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TZ250
4th September 2010, 02:59 AM
The Giant Leap Rocketry 4” Talon is a cool kit. I bought the fiberglass version and I’m glad that I did. I made one significant change; I opted to use a 54mm Aeropack motor retainer instead of the Slimline that the Talon was designed for.

I must give credit where credit is due: Bob Mosley at Aeropack and Kent Burnett at Giant Leap Rocketry have been fantastic to deal with. Both have politely (and patiently!) answered my phone calls and emails. They both possess a great deal of knowledge and they’re glad to help. I spent a lot of time with Mr. Mosley on the phone as he explained the details of the conversion. FYI, the conversion was my idea. I liked the Aeropack retainer on my Wildman Dark Star Lite, so I wanted to have the same style on my Talon.

Mr. Mosley explained what had to happen to make the Aeropack RA54P retainer fit. He was well ahead of me at that time. Although it seems simple now, I didn’t immediately understand the process. The 4” Talon orignally used two centering rings in the airframe, and the tailcone is epoxied to the Slimline retainer. It is designed for the Slimline to be a centering ring. I had to make a third centering ring that would fit just above the RA54P. I approximated the angle of the tailcone to be 5.5.

A good (great!) friend owns a machine shop. I stopped by on Monday of this week to show him the Talon kit. He said that Tuesday would be a good day for me to machine my parts because he was planning to spend the day taking care of paperwork. We cut the tailcone shorter so that it would clear the Aeropack RA54P. We then measured to the top of where the new centering ring was going to fit. I had some leftover ” oak and thought that it would make a good centering ring. Tom cut the oak on his 3 axis CNC mill.
The Beginning
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4201_1000_A.jpg

Custom made centering ring on a 3-Axis CNC Mill
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4206_1000_A.jpg

U-Bolt Installation
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4212_1000_A.jpg

I then cut the 5.5 taper on a lathe. I left the centering slightly over sized so that I could sand it to fit the tailcone. While I was there I also used the drillpress to bolt the stainless steel U-Bolt to the top centering ring. I used Loc-Tite on the nuts, then later epoxied them into place. I had to sand the edges of the washers to make them fit inside the airframe.

Lathe Work
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4217_1000_A.jpg

Front View
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4219_1000_A.jpg

Preliminary Measurements
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4221_1000_A.jpg

The next day I sanded the I.D. of the new centering ring for a better fit. The tapered centering ring was sanded on the outside edge until it fit inside the tailcone at the correct depth. That way, the RA54P and tapered centering ring will be (are now) epoxied with JB Weld to the motor tube. The outer edge of the top surface of the tapered centering ring is epoxied to tailcone. Everything is concentric and strong.

When I fit the motor tube/airframe/tailcone assembly together I had a 54mm-38mm adapter in the motor mount and also a Aerotech 38-720 in place. That way I wouldn’t be surprised with fit issues later on. I had to widen the slots about .010”. The fins fit perfectly now. The airframe was cleaned inside and outside with alcohol to remove oil and sanding debris.

Testing 1,2,...
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4236_1000_A.jpg

Thousandths Matter
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4241_1000_A.jpg

Big Difference
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4244_1000_A.jpg

Naturally, I sanded around the fin slots so that the epoxy would have more surface area to adhere to. I also sanded inside the airframe around the slots and where the centering rings would go. It was great to reach inside the airframe! I also drilled holes so that I could inject epoxy onto the centering rings. I don’t know if it needed it, but the CR’s have epoxy fillets top and bottom. I did not use the stick method that GLR mentions. I poured epoxy on a 3/16” dowel and let it run down to the top surface of the top motor mount. The centering rings were slightly loose when the motor tube was in the correct position. I used a wood clamp to hold the bottom centering ring and airframe together until the epoxy cured.

Third Hand
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4252_1000_A.jpg

After that, I removed the tailcone and inverted the booster. I poured epoxy onto the bottom surface of the middle CR and injected epoxy onto the bottom surface of the top CR. Speaking of epoxy I used Pro Line epoxy from Wildman. It is very thin and runny so it required more colloidal silica than the System Three epoxy that I used last time. This time I bought the West System mini-pump set. It was so easy to mix that I kept checking everything to make sure that I had the correct ratios. It will be a long time before I weigh epoxy!

I Made A Mess!
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4267_750_A.jpg

I'll Never See The Motor Tube Again
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4261_1000_A.jpg

I also drilled a hole for epoxy through the tailcone. This epoxy joined the outside of the tapered centering ring to the tailcone. Next week I’ll fill this area with Mega-Foam. I would feel better with fiberglass tailcone and nosecone, but this will do.

The booster is now finished. That was the most difficult part of the build because I couldn’t use GLR numbers once I cut the tailcone. I was on my own to establish reference points. It wasn’t hard, but it added to the build time.

I'll post more pictures of the build soon. For now, I need to get back to normal life! :) I've been staying up late working on numbers, then checking the dry assembly, then epoxying everything together. (Is epoxying a verb?) ;)

I still need to buy some supplies, but they will have to wait. I need parachutes, altimeters and a CTI 6XL case and motor. It will certify on a Aerotech J350.

TheAviator
4th September 2010, 03:28 AM
Thousandths Matter
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4241_1000_A.jpg

Big Difference
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4244_1000_A.jpg



I'm glad to see that I'm not the only person that uses a pair of calipers while building rockets! That's a nice interference fit right there. Not really a good thing, but that's what sandpaper is for, right? I think I'd prefer that over an overly large slot.

fox_racing_guy
4th September 2010, 11:07 AM
Great looking build with excellent photo's. If you fly that at a Team Ohio launch this fall I would love to see it.

TZ250
5th September 2010, 05:15 PM
That's a nice interference fit right there. Not really a good thing, but that's what sandpaper is for, right?

How about rotary sandpaper. ;) I widened all of the slots in ten minutes. I only needed .005" per side, and the Dremel made that an easy task.
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4250_1000_A.jpg

ThreeJsDad
5th September 2010, 08:37 PM
The Talon has always been a thorn in my side. I LOVE how they look but they have so flight issues that I really don't like.

Your skills and your shop are an entirely different matter. You have excellent building skills and you have some very nice toys...I mean tools !!! I love you attention to detail.

Paul

BsSmith
5th September 2010, 10:56 PM
The Talon has always been a thorn in my side. I LOVE how they look but they have so flight issues that I really don't like.

While I cannot speak for the Talon 4, my Talon 3 flies just fine. I did have some small stability issues when I flew it single deploy, but when flown dual deploy with a tracker bay in the nose, it flies beutifully. I've even flown it on a J510, which is a couple grains larger than the maximum motor size, no issues. I built it with no attention to removing weight from the back.

ThreeJsDad
7th September 2010, 02:29 AM
You are actually describing my only gripe with the Talon series. They seem to have some stability issues unless they are flown on a pretty hard hitting motor. Yah the J had more grains but that is a pretty hard hitting motor for a 3" rocket. I have flown by 4" by 10' WISHB in an I435 and it is still very stable. My home field isn't super sized and has a lower waiver. This makes it tough to fly rockets that need to be moving fast to be stable.

Like I said, I love the design and if your home field can handle very high flying rockets the TALON is a wonder rocket. :cheers:

Let's gat back to the build, I want to learn some more stuff.

Paul

BsSmith
7th September 2010, 02:34 AM
You are actually describing my only gripe with the Talon series. They seem to have some stability issues unless they are flown on a pretty hard hitting motor. Yah the J had more grains but that is a pretty hard hitting motor for a 3" rocket. I have flown by 4" by 10' WISHB in an I435 and it is still very stable. My home field isn't super sized and has a lower waiver. This makes it tough to fly rockets that need to be moving fast to be stable.

Paul

I've actually flown my Talon on an H268 as well. The igniter was installed wrong, so it burned all the bottom grains then the top about a second later, so the peak thrust was lower as well.

It only hit 950', strait as an arrow, and with the DD it landed about 50' away from the pad.

TZ250
8th September 2010, 05:38 AM
For comparison’s sake, this is my first highpower rocket next to my second. What a fun hobby!

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4275_300_A.jpg

There has been little progress made since my last post. However, any progress is good news! I epoxied the airframe coupler, av bay, into the upper airframe. This area has to be clean because the bulkheads seal against this surface and because it slips into the upper part of the lower airframe. I carefully applied epoxy into the airframe, trying to make sure that I didn’t have too much. I did. That wasn’t a problem because I wiped the excess off with alcohol. The outside stayed clean.

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4301_375_A.jpg

The Proline epoxy gets hot! Small batches haven’t melted my cheap plastic cups, but a large batch created significantly more heat.
Hot Stuff!
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4294_942_A.jpg

I tried to keep some forward momentum, so I built the electronics sled. The width of the G10 is slightly tapered, but that won’t affect it’s function. It has about ” clearance per side. I measured the bolt hole spacing in the bulkheads, which is 1.620”. To keep everything perfectly centered I needed 0.611” under the outside of the brass tube. One of my sets of setup blocks is 0.620”, so I used it. What’s .009” between friends? ;) I realize that the sled doesn’t require this amount of precision, but the blocks are a convenient way to hold everything together. I was working by myself. I tacked the brass tube in place with Super Glue and carried it outside for a picture. After this was taken I mixed some epoxy and added a 0.175” fillet the length of the tube, on the top surface. If I had thought more, I would have flipped the sled and installed the fillet on the bottom. That way I would have been able to stack blocks on top of the brass tube. The way I did it required extra thought and time. I couldn’t stack blocks on top of the tube because the fillet was now there.

Third and Fourth Hands
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4284_1000_A.jpg

I then got an angle plate and placed it on my surface plate. I used the same surface for all measurements to make sure that the brass tubes remained parallel. Since I needed a spacing of 1.620”, I used another setup block and placed a 1.000” parallel on top of that. The spacing is perfect and the brass tubes are parallel. I then tacked the top of the brass tube with Super Glue and added a 0.175” fillet to the top surface. After that had cured, I flipped the sled and placed two fillets on the bottom side of the brass tubes. I let them cure at an angle to help the epoxy flow better.

One clamp is all that was needed
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4307_1000_A.jpg

Simple is good
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4304_1000_A.jpg

Curing Phase
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4311_1000_A.jpg

TZ250
13th September 2010, 03:50 AM
The Talon is a little closer to completion. Even though it's going to certify with single deployment, I started working on the AV bay. I used a fancy extension for my shop vac to help hold things together. Neither would fit. I noticed that they both rocked in one area. I measured the diameter and discovered that both were 0.025" out of round. My Dremel is the go-to tool for this type of work. Once that was solved, everything came together quickly. With the AV bay at the top, I placed a wood disc inside the airframe, resting on the shop vac extension. I then placed some Titebond wood glue on the inner disc and dropped in from the top. I used the all-thread to align the holes for the all-thread. I placed a weight, really just a tube of Liquid Nail, on top to slightly compress them. This method kept the two discs concentric. The next day I installed U-bolts instead of the rolled eye bolt that came with it. The discs are starting to get cramped for space now, but I still have enough room for the charge canisters.

Soon, I'll sand the airframe because it's convenient to do without fins. The fins should be installed later this week. After that, it will be ready for the L2 cert. flight.

Note: Fancy Tools Used
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4495_229_A.jpg

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4501_A.jpg

pcotcher
13th September 2010, 03:11 PM
I'm enjoying reviewing your thread, as you know I have my own FG T4 to work on - and am actually just about to start.

I've been coming up with an alternate sequence, as I just can't live without internal filets, and don't want to inject them with that big of a spread between the 98mm airframe and 54mm MMT.

Also sill wierded out by the fixed av-bay design, but am getting my head around the right way to load it - vs. just sticking with the switch band setup that you see with most av-bays.

Keep rolling, I'm enjoying your alternate take on how to do it.

TZ250
13th September 2010, 04:21 PM
Paul, I am also going to inject epoxy for internal fillets. You can see the holes that I've already drilled. I drilled them close to the fin slots so that the external fillets will cover them. The epoxy will only run down about 1". I have no problem letting it run down that far. In addition to the epoxy on the root edge, the fin/motor mount joint will have epoxy. After that cures, I'll point the fin downward, inject some epoxy on both sides, cover the hole with tape, and let everything cure. The last fillets to be installed will be external. That's six fillets per fin plus the root edge. It will be very strong. In addition to that, my Mega-Foam will arrive tomorrow. I wanted that for the tailcone and nosecone because they're plastic, not fiberglass.

This is the way that I epoxied the fillets on my Dark Star Lite.
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSL_Epoxy_CAD.jpg

TZ250
16th September 2010, 03:13 PM
The rocket is still progressing, just at a slower rate. I sanded the airframe last night. I'll install the fins over the next few days.

I'll have more pictures soon. :)

TZ250
21st September 2010, 02:27 AM
The lower fins and one upper fin are tacked into place. I 'buttered' the root edge where the fin contacts the motor tube, per Giant Leap instructions. I did that several times, per Giant Leap instructions, to make sure that there was plenty of epoxy on the root edge. I also left a few small dabs of epoxy between the fin and airframe.

I made one mistake during the fin installation. I forgot to bevel the edges of the first fin before installing it. I beveled the remaining fins before they were installed. I'll sand the bevel on the first fin by hand once all of the epoxy has cured.

I used right-angle aluminum channel as a guide. The channel has a slot cut in it that is .096" wide. I used bungee cords to keep the right-angle channel centered and tight while the epoxy was curing.

I'm going to epoxy one more large fin tonight. I'll tack the other one in the morning. After that, I'll start injecting epoxy. After that, I'll finish with the exterior fillets.

The hard part of the build is finished. All that's left is recovery gear and paint.

First fin tacked into position
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4515_1000_A.jpg

t's nice to see it with fins!
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4524_1000_A.jpg

Blackfly
21st September 2010, 02:51 AM
Nice build; I really like your details like the tapered ring in the tailcone. Subscribed!

TZ250
23rd September 2010, 02:24 AM
The fins are now in the correct location. I still need to add the external fillets, but that is the easy part.

I drilled holes into the airframe next to the fin slots so that I could inject epoxy. I wanted a small amount of epoxy on the motor tube/fin joint. That is now complete. I'm still debating on whether or not I'll add epoxy to the inside of the airframe where it meets the fin. A small amount would be okay. Weight gain is minimal; we're talking about grams.

A couple of the holes are farther from the slot than I intended. The .375" (3/8") radius of the spoon will barely cover a couple of the holes. I'll probably use a .5" radius for the fillet. That is the radius of the handle of the plunger of the syringe. That's why it's included in the picture.

It's been a fun rocket to build. I enjoy building rockets as much as I enjoy flying them! :)

.375" radius of a plastic spoon that GLR recommends for fillets
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4531_1000_A.jpg

It's now ready for fillets!
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4538_1000_A.jpg

TZ250
24th September 2010, 02:51 AM
2/3 of the fillets have been applied. I would say 'finished' but they need a little sanding. I used colloidal silica to thicken the epoxy. Proline epoxy is very thin compared to the System Three that I used for my Dark Star Lite. I had some clumps that can be seen in the final fillet. This is a snapshot of the first set of fillets. I made sure to thoroughly mix the silica for the second set. The second set is smoother. My System Three fillets were immediately as smooth as glass. These will need to be sanded. I'll use a 1" dowel to keep the same radius.

The bumps are only a few thousandths above the surface. It will take very little sanding to make them perfect. One more set to go! I'll take care of those tomorrow morning. I hope to have them sanded by the end of the weekend. I now need parachutes, then I can try to certify for L1 and L2. It will probably certify without paint. Later, I'll buy altimeters and set it up for dual deploy.

The parallel lines are a result of sunlight coming through the windows of the garage door. The lines are the areas between the windows.

A Bumpy Road
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4558_1000_A.jpg

Pantherjon
24th September 2010, 02:38 PM
Those fillets look pretty dang smooth to me Rob!;) The ones on my Ultimate have bumps that look like 'bunny hills' at a ski resort!:roll:

TZ250
25th September 2010, 03:06 PM
Those fillets look pretty dang smooth to me Rob!;) The ones on my Ultimate have bumps that look like 'bunny hills' at a ski resort!:roll:

Coming from you, I feel better about my epoxy bumps. Thanks Jon! :D

All of the epoxy fillets have been applied. They are dry and waiting to be sanded. I now need paint and parachutes.

This bird may fly next month!

TZ250
26th September 2010, 10:56 PM
This is a snapshot of the mess that I made while adding epoxy fillets.
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4573_Grey_1000_A.jpg

It's waiting for recovery gear. Other than that, it's ready to fly. I'm not sure if I'll have a chance to paint it before the L2 cert. flight.
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4577_500_A.jpg

Pantherjon
28th September 2010, 09:44 PM
Yeah, you made quite a mess in making all of the background turn grey!:duck:


:roll:

Have you come up with a paint scheme?

TZ250
29th September 2010, 02:50 AM
Yeah, you made quite a mess in making all of the background turn grey!:duck:


:roll:

Have you come up with a paint scheme?

It's easier to clean the picture of the garage with Photoshop than it is to actually clean the garage! :neener::D

I'm still debating on a few paint schemes. I hope to have it painted in the next couple of weeks.

TZ250
29th September 2010, 11:21 PM
Have you come up with a paint scheme?

My issue now is saving for money for paint or parachutes. It needs parachutes to certify L2, but I'd really like to paint it before the weather turns cold. Fortunately, a friendly member here on TRF offered to let me borrow a 'chute at a Team Ohio launch. If I paint it now, I can borrow a parachute, then ask for parachutes for Christmas.

I have to watch my spending. The rocket is complete, but needs parachutes and altimeters. L2 on a budget sounds crazy! ;)

So, I want to paint it, but I need parachutes. Sylvia Plath defined that as neurotic! ;)

DAllen
1st October 2010, 11:21 AM
How about rotary sandpaper. ;) I widened all of the slots in ten minutes. I only needed .005" per side, and the Dremel made that an easy task.
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4250_1000_A.jpg

YIKES!

Kids, when you do this operation at home be sure to wear your safety glasses. Those little disks can go KAH-BLAMMO and billions of little pieces will go flying by your face at 107032984576 mph. :y: (Can you tell that's happened to me before?)

Nice build!

-Dave

TZ250
11th October 2010, 04:37 AM
The Talon is still progressing toward the L2 flight. I've had some things to take care of and haven't been able to spend time on the rocket. It's now been sanded a couple of times to fix a couple of small imperfections. I've experimented with one color on a scrap piece of PVC tubing. This color is awful! I tried changing the primer color, changed the base to silver and changed the base to white.

I hope to order the paint that I really want in a day or two. It may be a couple of weeks before it's painted and ready to go. A VERY helpful TRF member sent a parachute for me to use for the L2 cert. flight. That allowed me to concentrate on the paint.

I hope to have some in-process paint pictures soon.

TZ250
21st October 2010, 01:36 AM
I've started on the 'bodywork' of the Talon. It sat for a while until I could find time to work on it. My biggest problem has been dealing with the plastic nosecone and tailcone. Fiberglass cones are far superior! I used 3M spot putty to fill the voids. I thought that it would be okay to use a sanding block with 80 grit sandpaper until the spot putty was close to the surface. I was wrong! I'll never, ever use coarse sandpaper anywhere near plastic. It cut hundreds of tiny slices into the plastic, each with there own tiny burrs.

I'm still making progress.

A work in progress
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4595_350_A.jpg

My 'hound approves of my rocket build :D
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4628_1000_A.jpg

White primer works better with the top coat
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4674_1000_A.jpg

It still needs filling/sanding before it's painted
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/Rockets/DSC_4856_1000_A.jpg

TZ250
25th October 2010, 04:08 PM
I did more painting yesterday. The wind was gusting and I had to wait between gusts to paint. I learned that I'm not a good painter. I had one run on a small fin. I tried wiping that off before it became a mess. That was not a good decision. The paint smeared and left an ugly texture.

I'm racing to get it painted before cold weather arrives. I could have waited until next spring, but I wanted to see it painted. The old adage is true, haste does make waste!

I was so disappointed in the paint job that I considered naming the rocket "Graffiti". ;)

In five days I'll apply the clear coat and it will be done. I also need to order a decal from Stickershock23.

I'll post pictures soon!

TZ250
9th November 2010, 04:17 AM
Update: I'm now L1 & L2 certified. I went to TORC Fest #2 and met many nice people. Mark Lose and Chris Pearson helped A LOT!

Just before the pre-flight L2 tech. inspection
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_5233_1000_A.jpg

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_5246_1000_A.jpg

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_5247_1000_A.jpg

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_5248_1000_A.jpg

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_5249_1000_A.jpg

Rocketman248
9th November 2010, 04:28 AM
Congrats! Any details on the flight? Motor, altitude, etc?

TZ250
9th November 2010, 05:26 AM
Congrats! Any details on the flight? Motor, altitude, etc?

Thanks Nick. It flew motor ejection so the flight was basic. I don't have an altimeter. The motor was an Aerotech J350. OpenRocket approximates the altitude to 2,650 ft. That's all that I have for reference.

The flight was perfect and the rocket had zero damage. Earlier in this thread some people were saying that a Talon's had stability issues with a small motor. The winds were consistently blowing at 10-15 MPH, the motor is considered minimum for this rocket, and it flew straight as an arrow. I'm happy with this kit. Now, I want to see it fly with a K700, K1100 & CTI L935.

Before those flights, I need an altimeter. I have a lot to learn.

Six months ago my wife asked me to build a small rocket for her classroom. That was my first rocket, an Apogee Aspire. I learned a lot in six months, but I have at least that much more to learn about L2. In a couple of years, I'll start checking into L3.

cjl
9th November 2010, 05:30 AM
Congratulations on the L2, and it looks like a great flight.

I would suggest flying it on a large J or small K (54mm 3 or 4 grain) before shoving in a K700 or L935. Even a full J (54mm 3 grain) is quite a lot more power than a J350, so it's a good idea to work your way up and get a good idea of the additional power 54mm offers.

Nice pics by the way :D

TZ250
11th April 2011, 06:08 AM
I made a new sled to prepare for TORC FEST #3. When I made the first one, top, I did not know how it was going to be used. The new one is shorter and has extended stainless steel tubes. I will use 1/4-20 nuts to secure the sled in place. I didn't like the original design because the fiberglass would have had stress from the nuts. That makes no sense to me.

Soon, I'll mount the batteries and Raven altimeter.

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_6996_800.jpg

JAL3
11th April 2011, 06:39 AM
Update: I'm now L1 & L2 certified. I went to TORC Fest #2 and met many nice people. Mark Lose and Chris Pearson helped A LOT!

Just before the pre-flight L2 tech. inspection
http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_5233_1000_A.jpg

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_5246_1000_A.jpg

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_5247_1000_A.jpg

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_5248_1000_A.jpg

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_5249_1000_A.jpg

I had not seen this thread before. It looks great. May I copy this post to teh gallery?

pokerace721
11th April 2011, 06:47 AM
Thanks Nick. It flew motor ejection so the flight was basic. I don't have an altimeter. The motor was an Aerotech J350. OpenRocket approximates the altitude to 2,650 ft. That's all that I have for reference.

The flight was perfect and the rocket had zero damage. Earlier in this thread some people were saying that a Talon's had stability issues with a small motor. The winds were consistently blowing at 10-15 MPH, the motor is considered minimum for this rocket, and it flew straight as an arrow. I'm happy with this kit. Now, I want to see it fly with a K700, K1100 & CTI L935.

Before those flights, I need an altimeter. I have a lot to learn.

Six months ago my wife asked me to build a small rocket for her classroom. That was my first rocket, an Apogee Aspire. I learned a lot in six months, but I have at least that much more to learn about L2. In a couple of years, I'll start checking into L3.

From an Aspire to a Level 2? That's a big jump....what about anything in between?

TZ250
11th April 2011, 05:04 PM
From an Aspire to a Level 2? That's a big jump....what about anything in between?


Yes, that's quite a jump. Obviously, I had a lot to learn. :roll:

My L1 rocket is a Wildman Rocketry Dark Star Lite. This thread became the build thread for that rocket.
http://www.rocketryforum.com/showthread.php?t=12948

I've built machinery for twenty years and can run mills, lathes etc. I have CAD/CAM software so I can design parts and can program CNC machines. The building process was not intimidating to me, but I had a LOT to learn about rockets. As you can see, I'm hooked on rockets now! :)

atxcple
11th April 2011, 07:44 PM
congrats on L2..great looking talon 4 i fly mine on LOKI L1400's:wink:

45736

45737

TZ250
14th April 2011, 09:16 PM
Even with the reduced size of the new sled, I still have plenty of room to mount the battery holder, battery holder support (not shown) and the tiny Ravel altimeter.

http://i561.photobucket.com/albums/ss58/TZ250Fanatic/DSC_7114_Crop_A.jpg

sparky
15th April 2011, 03:55 AM
I would mount the battery on the opposite side from the raven, just in case.

Crosswire3
5th May 2011, 03:08 PM
Rob,

I just got and replied to your email through UD's MEE dean. I was browsing your photos and got to your post #34 about TORCFEST #2 and saw my buddy's red pickup on the one photo. All the crap on/around it is mine, so I guess we were neighbors at that launch. Any plans for TORCFEST #3 (assuming it doesn't get cancelled? I was hoping to do my L3 on a 1/2-scale D-Region.

TZ250
5th May 2011, 03:53 PM
Rob,

I just got and replied to your email through UD's MEE dean. I was browsing your photos and got to your post #34 about TORCFEST #2 and saw my buddy's red pickup on the one photo. All the crap on/around it is mine, so I guess we were neighbors at that launch. Any plans for TORCFEST #3 (assuming it doesn't get cancelled? I was hoping to do my L3 on a 1/2-scale D-Region.

Crosswire3, I had planned to attend TORC FEST #3, but it was just cancelled due to rain. I will attend a U.D. rocketry club meeting soon. Should I bring a rocket, or three, with me?

As for the Talon, there has been little progress because of the demands of being a fulltime student. Soon, I hope to continue with the AV bay of the Talon and also finish my Kestrel.

jadebox
5th May 2011, 06:52 PM
The Talon has always been a thorn in my side. I LOVE how they look but they have so flight issues that I really don't like.



What flight issues? :-)

http://my.rocketreviews.com/image-roger-smiths-talon-400-600-48415.jpg
(http://my.rocketreviews.com//roger-smiths-talon.html)



(It was a motor problem that claimed my Talon 2, not any problem with the Talon's design.)

-- Roger