#1
|
||||
|
||||
TRACTOR Helix rocket (no Terri Garr)
So, I made a Tractor Rocket with two C6 engines near the nose. Canted outward a lot. And also skewed to make it spin.
Had some problems last week with the first two flights, using a rail. Roll torque issues. Video here, plus video of my Pumpkin Surprise rocket. https://www.youtube.com/watch?v=Bml...eature=youtu.be As some suggested, I changed it to use an axial lug thru the center. Which was simple in theory but not so much when it comes to getting the recovery system to eject from a rocket that has holes at both ends. But finally a simple-enough solution came to mind. Tail plug has telescoping tubing that fits over the rocket's lug, for a good pressure seal. Flew it twice yesterday. But flight 1 tangled the ignition leads, so it only got up about 20-30 feet and crashed. No significant damage. So, i flew it again, this time CHAD staged C6-0 to C6-3. And it worked GREAT (albeit with some weathercocking). It spins quickly, with a nice helical smoke trail. Also the sound pulsates, reminiscent of the sound of a rocket going quickly unstable, but this is stable. I figure it is now "operational", but i'm going to do a bit more with the umbilical method. Video of those flights here: https://www.youtube.com/watch?v=xu45HZ-psjw Note how useful it can be to have a camera at the pad, looking up. For a lot more info, and modifications for the axial lug: https://tinyurl.com/ysm7m43k
__________________
Contest flying, Sport flying, it's all good..... NAR# 18723 NAR.org GeorgesRockets.com Georges'CancerGoFundMe: https://www.gofundme.com/f/help-geo...ay-fight-cancer Last edited by georgegassaway : 10-31-2021 at 12:11 PM. |
#2
|
||||
|
||||
That's a very interesting and innovative model!
|
#3
|
||||
|
||||
Pretty darned cool.
__________________
When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, and HAVOC ! |
#4
|
|||
|
|||
Awesome stuff, George!
__________________
Scott D. Hansen Ye Olde Rocket Shoppe - Your One Stop BAR Shoppe! Ye Olde Rocket Plans - OOP Rocket Plans From 38 Companies! Ye Olde Rocket Forum WOOSH NAR Section #558 |
#5
|
|||
|
|||
That's a great project George.
Really cool with well engineered design and fun. Well done.
__________________
Bob S.A.M. # 0014 |
#6
|
||||
|
||||
Build one using some old FSI E60's.......
|
#7
|
||||
|
||||
The FSI E60 was the worst turd of a motor ever produced.
I had a cato rate well over 50%. They were large firecrackers that sometimes acted like a rocket motor.
__________________
When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, and HAVOC ! |
#8
|
||||
|
||||
So, I tried 4 more flights Saturday. The 3rd did not light one motor, but stayed on the pad, no damage (ignitor clip issue).
1st and 4th flights were two C6-3's and flew well. Second flight was CHAD staged (C6-0 to C6-3), it weathercocked pretty badly. Below, flight #4. More info here: https://tinyurl.com/w4w4yh3j Video is here: https://youtu.be/2RJBhbJmogI These were the first time I used MJG's BP e-matches (starters) for Estes type BP engines. I had read about them on this forum, and saw good reviews. Worked nicely. https://electricmatch.com/rocketry/...rocket-starters
__________________
Contest flying, Sport flying, it's all good..... NAR# 18723 NAR.org GeorgesRockets.com Georges'CancerGoFundMe: https://www.gofundme.com/f/help-geo...ay-fight-cancer |
#9
|
||||
|
||||
That’s so cool! LOVE the twisted smoke trails.
__________________
Never trust an atom. They make up everything. 4 out of 3 people struggle with math. Chemically, alcohol IS a solution. NAR# 94042 SAM# 0078 |
#10
|
||||
|
||||
Once you got the ignition wires out of the way, those flights were impressive!
__________________
Lee Reep NAR 55948 Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor In the Paint Shop: Nothing! Too cold! Launch-Ready: Farside-X, Maxi Honest John, Super Scamp |
Thread Tools | Search this Thread |
Display Modes | |
|
|