What did you do rocket wise today?

The Rocketry Forum

Help Support The Rocketry Forum:

DigBaddy

Well-Known Member
TRF Supporter
Joined
Feb 19, 2021
Messages
170
Reaction score
287
Location
SE, WI
A little while back I realized I was a coupler away from making a Super Baby Bertha (or close enough) with some BT80 on-hand. We love our little Baby Bertha and never have owned a regular Big Bertha or Super Big Bertha, so why start that trend now? :) Trying the baffle thing on this; haven't ever used one so figured this was a good time to experiment. Made one from basswood kinda modeled after this Qualman BT80 version. I should have taken pics before I put it in the BT. Quick puff through the motor tube shows it should work just fine. Got a lot of BT80 rockets now so I'm tired of wadding/dog barf usage :)

Fins are a tiny bit underscaled if based on a normal Baby Bertha; mostly to work with the 1/8" balsa sheets I had. Papered with resume paper and TBII. (done a few now with this combo and no edges of the paper want to peel up and they round perfectly when sanded. Made my own centering rings. Top is two layers of 1/16" basswood and the bottom is doubled up thick cardstock.

OR shows I could probably get away with no nose weight once complete. .9c with a E12-6 and it's stubby...we'll have to see how it really balances out. It's not like this will fly on anything smaller than a D so maybe a bit of weight would be smart.

Just not sure on color scheme. Logo I made is red/white/blue/black/yellow. So, might stick to the current paint scheme of the SBB (but perhaps a different color on the lower parts).
 

Attachments

Antares JS

Professional Amateur
Joined
Mar 5, 2020
Messages
1,083
Reaction score
1,248
Location
Eastern Shore, VA
I've been tempted a few times by this kit. You've done a superb job with the build/paint, I'm interested in how it flies.
It was a scale model for the Estes Pro Series II and that was enough for me to get it. I'm a big fan of long burn/low thrust motors like the E16 and F15 and am always up for a rocket that will fly on them.
 

Mike Haberer

Well-Known Member
TRF Supporter
Joined
Jan 7, 2019
Messages
637
Reaction score
402
Well, sort of. When I glued on the centering ring I wanted to locate the nut and washer (which is the back end of the eye bolt for the shock cord attachment) equally spaced between the fins. Had it been rotated a little more it would have interfered with the fin contacting the motor mount tube, I would have had to notch the fin tab which I didn't want to do. Fortunately I test fit the fins before the epoxy set. The aft ring was in place, to keep the tube aligned, but not glued yet so I didn't notice how close it was to the fin tab. Anyway, I'll finish doing the internal fillets and glue on the aft ring and no one will ever see it.
I was going to say the nut doesn't look like it's epoxied to the bolt such that it might come loose over time....
 

prfesser

Lifetime Supporter
TRF Lifetime Supporter
Joined
May 7, 2017
Messages
1,969
Reaction score
2,109
Location
Murray, KY
Made a couple of aluminum casting bases and altered a few coring rods.
 

OverTheTop

Well-Known Member
TRF Supporter
Joined
Jul 10, 2007
Messages
5,305
Reaction score
2,631
Location
Melbourne Australia
Been watching the decay of the Long March 5B stage that China launched recently. Let's hope it lands somewhere without causing damage. I think this is the largest uncontrolled re-entry, except for failures, since 1990.
 

teepot

Well-Known Member
TRF Supporter
Joined
Dec 8, 2019
Messages
1,204
Reaction score
766
Location
Pahrump, Nevada
I hope I get to see that rocket body go over. I went over to see Bill at BMS and picked up a large order of tubes, coupler stock, nose cones, bulkheads and motors. Should keep me in supplies for the month. I am so lucky to have him so close to me.
 

GrouchoDuke

Well-Known Member
Joined
Oct 18, 2016
Messages
1,150
Reaction score
579
Got some carbon CNC cut fins in the mail. The cut quality reinforced my thoughts of “I need my own CNC router.”
 

teepot

Well-Known Member
TRF Supporter
Joined
Dec 8, 2019
Messages
1,204
Reaction score
766
Location
Pahrump, Nevada
I received a Rocketman 48" 2.2cd chute in the mail. I primed a new space plane build and started another dual deploy rocket. And I'm waiting on paint to cure on another build so I can put on the second color. And went over to BMS.
 

Fishhead

Keel Loopy
Joined
Jan 20, 2009
Messages
3,535
Reaction score
187
I had six rockets that I wanted to fly on Saturday that needed work, so I got the work done on four of them. The ASP Corporal is ready for primer, I printed a decal for the Estes Voyager II, added nose weight to a TLP Exocet MM:40, and epoxied the launch lug back onto my LOC Lil' Nuke. I have a Beta that needs fin work today, and a Solar Flare that I'd finish if I could find the rest of the parts for it.:rolleyes:
 

Wayco

Desert Rat Rocketeer
TRF Lifetime Supporter
Joined
Mar 23, 2011
Messages
3,665
Reaction score
669
Location
Goodyear, AZ
Yesterday, I made up some new lighters for our research motors while two electricians re-wired my work area. They were a bit surprised when I lit one to test it.
This morning, I woke up at 2 am thinking about the 2.6" Madcow Fireflyer that I'm sending up to 25K ft. at NSL later this month. I decided to extend the charge cups by about 1 inch to improve the combustion of BP at high altitude. Got out of bed and measured the drogue space with an L935 installed, just enough room.
 

GrouchoDuke

Well-Known Member
Joined
Oct 18, 2016
Messages
1,150
Reaction score
579
I’ve been fighting a cold for the last few days, so I haven’t done much besides lay on the couch. I did manage to try out prototype version 2 for one of my rocket electronics designs today - everything works perfectly so far.
 

heada

Well-Known Member
Joined
Jan 18, 2009
Messages
4,170
Reaction score
1,319
Location
Indianapolis, Indiana
Shot silver and brown on my 3" BBX and just now pulled all the masking. Need to drill shear pin holes and mount a Quantum in the av-bay and it'll be done.
 

Lugnut56

Well-Known Member
TRF Supporter
Joined
Apr 7, 2015
Messages
960
Reaction score
328
Prepped the 3D printed parts for my SBR Bullet and got the white base coat on a Super Big Bertha.

Bullet.jpg
 

Lugnut56

Well-Known Member
TRF Supporter
Joined
Apr 7, 2015
Messages
960
Reaction score
328
What's the reason for the poking the nose cone through the box?
I had just coated the parts with thinned epoxy. It was windy out, and while the transition section and base piece were stable, I was concerned the nose cone would blow over. The epoxy was tacky so I wasn't concerned about it running down onto the shoulder of the nose cone.
 

jqavins

Helpful Smartass
TRF Supporter
Joined
Sep 29, 2011
Messages
5,669
Reaction score
2,753
Location
Howard, NY
I finally joined NAR and TRA. It is about to get off the pot and get this certification process going for the penultimate goal of Level 3. Down the road of course, but that is the goal...
If L3 is the penultimate goal, what's the ultimate?
 

Rory Gin

Well-Known Member
Joined
Apr 2, 2021
Messages
52
Reaction score
30
Location
Regina, Saskatchewan
I started studying up for my CAR Lvl 1 exam. In the mail came my first issue of Sport Rocketry. Later I picked up a 1010 x 6' rail from Acklands-Grainger. Tonight I will be sanding some plywood fins (putting on a chamfered leading edge).
 

Lugnut56

Well-Known Member
TRF Supporter
Joined
Apr 7, 2015
Messages
960
Reaction score
328
I wish my hand stitching looked that good.
[/QUOT

This is the second shockcord I've stitched (first was on my Zephyr--man was I nervous when I went for my L1.) I learned how to do this watching John Coker's video. Like most things, you get better the more you do it !

 

Michael L

Random Pixel Generator
TRF Supporter
Joined
Sep 22, 2020
Messages
308
Reaction score
233
Location
Weimar, TX
Well... the first and only stitching that I've ever tried was when I sewed a loop in the shock cord of my LOC IV that I flew for my L1 attempt (I'm happy to say it was successful) on 5/1/21. I watched John Coker's video too. His stitching went better than mine and recovery was the most nerve wracking part of the flight. I just knew my stitching was going to tear out on ejection and my chute would go one way and the rocket parts would go another. But it held with no apparent damage.

AFTER I got home from the launch I read the directions and found out that the side that formed a loop when you pull it bac was where I was supposed to pass the cord through. That was good info LOL
 
Top