Bull Pup AGM-12C by The Launch Pad (24mm)

Well, I've turned into Power-Building Rockets! A couple anyways.
I've started the Bull Pup. Here's that paper cone tip. I cut off the lapping
piece and will be placing it on the inside of the "cone tip", like sodmeister
and others do. The gluing tab doesn't go all the way to the tip...


I need advice on the motor tube. I'll keep it 24mm, but should I get a longer
piece of tubing? (BT-50) I think is what I need. And how long should I cut it? I've got
3 other TLP kits to build so having to buy more than one piece of tubing is OK by me.

I'll purchase the Aerotech 24/40 case. Reloads come out cheaper and I get some experience
on loading motors.

JP

:clap:op:

PM me if you'de like a 12" Section of LOC 24mm MMT. I'll Mail it right out to you.
The LOC Tubing is pretty nice, and 12" should be plenty, but I could part with a longer length of it if you need it. I have plenty.
Plus, then you don't have to buy anything.

TopRamen said:

PM me if you'de like a 12" Section of LOC 24mm MMT. I'll Mail it right out to you.
The LOC Tubing is pretty nice, and 12" should be plenty, but I could part with a longer length of it if you need it. I have plenty.
Plus, then you don't have to buy anything.

Click to expand...

Thank You! PM sent with address.
What length should I cut? 3.5", 4"? No idea what the AT24/40 needs...

Here's the paper nose tip. It helps to shape it over a steaming pot on the stove top,
keeps the tip from creasing. TLP needs to upgrade to nose cones with sharper points
so one doesn't have to go to all of this trouble!


JP

JP Morgan said:

Thank You! PM sent with address.
What length should I cut? 3.5", 4"? No idea what the AT24/40 needs...

Here's the paper nose tip. It helps to shape it over a steaming pot on the stove top,
keeps the tip from creasing. TLP needs to upgrade to nose cones with sharper points
so one doesn't have to go to all of this trouble!
View attachment 165011

JP

Click to expand...

the 24/40 case doesn't need anymore length than an Estes D. Besides that, your motor tube doesn't need to be as long as the motor you intend to use for any specific reason.

D's and 24/40 cases approx. 2.5", E's & 24/60 cases 3.5". assuming that you're not needing a stuffer tube.
Rex

chadrog said:

the 24/40 case doesn't need anymore length than an Estes D. Besides that, your motor tube doesn't need to be as long as the motor you intend to use for any specific reason.

Click to expand...

OK, I get that.

"D's and 24/40 cases approx. 2.5", E's & 24/60 cases 3.5". assuming that you're not needing a stuffer tube".
Rex

If this kit just had a little bit heavier tubing, I would consider the 24/60 case. 24/40 looks to be a good choice
for all of my TLP kits.
Thanks guys!

JP

The BT80 tube will withstand the thrust of an F35 (24/60) easily. Be sure to check your stability margin before you fly.

NAR29996 said:

The BT80 tube will withstand the thrust of an F35 (24/60) easily. Be sure to check your stability margin before you fly.

Click to expand...

I follow Pauls Technique of using a different Coupler than the one supplied with the TLP Kits to increase the Stiffness of the BT-80 Tubes.

NAR29996 said:

The BT80 tube will withstand the thrust of an F35 (24/60) easily. Be sure to check your stability margin before you fly.

Click to expand...

I wondered about that particular case in this rocket.

JP

TopRamen said:

I follow Pauls Technique of using a different Coupler than the one supplied with the TLP Kits to increase the Stiffness of the BT-80 Tubes.

Click to expand...

I'll look back on that idea.
I still haven't figured out how to do multiple quotes!

JP

Just got home from the Post Office. Your LOC MMT is on its way.
I "overbuilt" the Package so it does'nt get crushed in transit.

TopRamen said:

Just got home from the Post Office. Your LOC MMT is on its way.
I "overbuilt" the Package so it does'nt get crushed in transit.

Click to expand...

Thank you my Friend!
I sent out the Mylar parachutes to the guy looking too.
Rocket Men get along vey well...

JP

JP Morgan said:

Thank you my Friend!
I sent out the Mylar parachutes to the guy looking too.
Rocket Men get along vey well...

JP

Click to expand...

No problem. Others here on this Site have sent me stuff, and just asked me to "Pay it forward", so I'm glad to be of service to fellow Rocketry Enthusiasts. Especially when a Scale Missile Build is involved!

Got a little more done today. My wife says "you'll put your eye out" with the nose cone tip!

So I shaped the rear fin slightly different than stock, closer to an image I got off the web.
Instead of the balsa pieces for the root edges I'm using birch pieces. Found the stuff at Wallyworld.
Used my aluminum angles to keep the pieces flat when glued up, clamping two pieces together.



And I got some real motor hooks from Jonrocket.com


JP

The Nose Cone is looking good. Heed your Wifes advice. I made the Tip of my TLP ALARM Kitbash so Sharp that I accidentally stabbed myself in the Thumb with it while Sanding.

TopRamen said:

The Nose Cone is looking good. Heed your Wifes advice. I made the Tip of my TLP ALARM Kitbash so Sharp that I accidentally stabbed myself in the Thumb with it while Sanding.

Click to expand...

That's when you know you've got it right :wink:.

TopRamen said:

The Nose Cone is looking good. Heed your Wifes advice. I made the Tip of my TLP ALARM Kitbash so Sharp that I accidentally stabbed myself in the Thumb with it while Sanding.

Click to expand...

Dang dude!

NAR29996 said:

That's when you know you've got it right :wink:.

Click to expand...

It's right then! If I tried it would puncture skin!

The rear fins are dry and straight. They had no choice but to come out straight! I've got to strengthen
the fins somehow. Not sure if I want to do paper and thin CA or straight CA. Thought about a layer of
balsa, crossing up the grain and sanding the edges to a bevel, similar to other TLP kits that use the balsa
and paper method to achieve fin airfoils...

JP

Inside glue tabs, cutting angles off at the tips. Glue one half at a time, letting it dry before
rolling and gluing together.

Make sure the tab is flat while drying.
I press it on the "green builders matt" (most of us have) with a small metal ruler for this.



JP

Waiting on the motor tubing from TR to arrive, it's time to do the Flares that glue to the tail cone.
I made this JIG for sanding them to a taper. Most of the time I don't fasten the sand paper to my
sanding bar. This way I can slide the sand paper half way off the bar, as shown, that way I don't sand my JIG.
If you build rockets and you don't have a sanding bar, such as the Great Planes one, how do you manage!
The wood disc (JIG) is from Wallyworld, only 97 cents each, found in the Crafts section with dowels, artist brushes and such.
I've used these discs to make Centering Rings. They are lighter than most plywood Centering Rings and sand easier too.
I used CA at the rear of the dowels only so as not to mess up the finished product.

This first image (above), is at a point where the Flares are close to being finished.
I cut slightly beyond the pencil line and rounded back to it.

JP

JP Morgan said:

Here's the paper nose tip. It helps to shape it over a steaming pot on the stove top,
keeps the tip from creasing. TLP needs to upgrade to nose cones with sharper points
so one doesn't have to go to all of this trouble!
View attachment 165011JP

Click to expand...

If you can get a Nose Cone from the Executioner or Phoenix it would work well. Here's one on ebay

Not as pointy but.....

TopRamen said:

I follow Pauls Technique of using a different Coupler than the one supplied with the TLP Kits to increase the Stiffness of the BT-80 Tubes.

Click to expand...

I have built quite a few TLP kits replacing the coupler with a Jonrocket BT 80 Baffle...works great!

https://www.ebay.com/itm/171240914127?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Very sturdy and you can still use the stock parachute shelf.

Cheers!!

dgreger said:

If you can get a Nose Cone from the Executioner or Phoenix it would work well. Here's one on ebay

Not as pointy but.....

Click to expand...

That's a good idea. The paper nose may give way after a few landings. This would certainly replace it.
Thanks!

JP

marwady said:

I have built quite a few TLP kits replacing the coupler with a Jonrocket BT 80 Baffle...works great!

https://www.ebay.com/itm/171240914127?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Very sturdy and you can still use the stock parachute shelf.

Cheers!!

Click to expand...

I'll check that out. Thanks!

JP

marwady said:

I have built quite a few TLP kits replacing the coupler with a Jonrocket BT 80 Baffle...works great!

https://www.ebay.com/itm/171240914127?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Very sturdy and you can still use the stock parachute shelf.

Cheers!!

Click to expand...

I use Sunward Baffles for Couplers.

TopRamen said:

I use Sunward Baffles for Couplers.

Click to expand...

Link?

JP

I ordered them from Apogee Components.

www.apogeerockets.com

https://www.apogeerockets.com/Build...ion_Baffles/BT-80_66mm_Ejection_Charge_Baffle

TopRamen said:

I ordered them from Apogee Components.

www.apogeerockets.com

https://www.apogeerockets.com/Build...ion_Baffles/BT-80_66mm_Ejection_Charge_Baffle

Click to expand...

Thanks there buddy!
I have a short piece of bad TLP tubing, I may make a baffle out of that. Not sure about the ring pieces though
at this time. I like the baffle opposed to wadding.

JP

I got the LOC 24mm motor tubing today from TopRamen! Thank you again!
Got the motor mount made up and drying.
Here I used the E size motor clip from Estes. The package came with an adaptor
so I can also use D motors.


JP

JP Morgan said:

That's a good idea. The paper nose may give way after a few landings. This would certainly replace it.
Thanks!

JP

I'll check that out. Thanks!


JP

Click to expand...

You can always do what I do and fill the Paper Cone with PC Superpoxy.

JP Morgan said:

I got the LOC 24mm motor tubing today from TopRamen! Thank you again!
Got the motor mount made up and drying.
Here I used the E size motor clip from Estes. The package came with an adaptor
so I can also use D motors.
View attachment 165511

JP

Click to expand...

No problem. Hope you enjoy it.