Also, if you're straightening the front end of the hook and skipping the engine block, what do you have to keep the motor from pushing forward? I think I must be missing something.
To answer your question the hook is attached with glue (Titebond) for half its length, plus the little plastic ring that is glued over it, and a strip of heavy kraft tape and more glue for good measure.For standard engine hook installations,the engine block is to stop the front end of the motor hook from putting all the forward thrust pressure from the engine on one small spot, possibly damaging the motor tube. The block spreads the thrust over a wider area, i.e. the diameter of the tube. But if you are straightening the front end of the hook to allow for longer engines, how are you securing the hook to the motor tube? Seems like rear tape wrap or a screw on retainer would be easier.
If I use commercial 18mm motors, a couple wraps of masking tape on the aft end should do. The Green Monkey Aerospace motor casings all have an integral thrust ring. Though I doubt I'll be putting the 7.75" motor in the Interceptor; that's likely to be an F or (possibly) a baby G.Also, if you're straightening the front end of the hook and skipping the engine block, what do you have to keep the motor from pushing forward? I think I must be missing something.
(Why have both a motor hook AND an engine block??? If you're using standard 18 mm motors the motor hook is quite enough to stop any forward motion of the motor.)
GMA was a brief foray of Neil Kinney's (husband of Nadine, of rocket photography/calendar fame). He made hardware for 13mm and 18mm composite research motors. And no, I wouldn't put the big case into the Interceptor anyway, I've waited too long for Estes to bring 'em back and for AC Supply to have 'em in stock. Most I'd do would probably be a D, maybe a baby E motor.You mention 18mm experimental motors and a 7 3/4" case. Is that a composite motor? If so I would expect significantly more thrust than a BP Estes motor. Also putting a 7.75" case into an Alpha MIGHT significantly change the CG ( just my guess). You may have to put A LOT of nose weight into that rocket to fly stable.
Joe, could be that the motors have a rear flange on them. Not familiar with the Green Monkey motors.
Sounds REALLY interesting. If you get a chance to launch them some videos would be nice. Cheers!.GMA was a brief foray of Neil Kinney's (husband of Nadine, of rocket photography/calendar fame). He made hardware for 13mm and 18mm composite research motors. And no, I wouldn't put the big case into the Interceptor anyway, I've waited too long for Estes to bring 'em back and for AC Supply to have 'em in stock. Most I'd do would probably be a D, maybe a baby E motor.
Performer 98?The motor fairy brought gifts!
Got my L1000 that I’ll be using for the test flight for my L3 rocket. Plus a J500 for my 3” scratch build.
View attachment 375215
Worked on my new 3D printed scratch build. Only thing left is finishing the coupler and attaching the recovery system.View attachment 375350View attachment 375351
Thank you! The wrap is just 3M (I believe) carbon fiber vinyl, forgot the specific one. I put it on for the looks and to protect the cardboard tubing.Looking good! Well done.
Question: Is your airframe wrapped with 3M Di-NOC?
I'm glad I'm not the only one with a fancy rocket cradle made out of a box with a notch cut in itLaid internal fillets for my loc vulcanite - first time building fun can externally. Got a start on the fillets on my mach1 desdemona
View attachment 375235View attachment 375236View attachment 375237
Performer 98?
Wow, it really does look similar. Your DX3XL is looking good, good luck on your L3.Took me a second on Google to figure out what you were asking. It's a MadCow 4" Fiberglass DX3XL -- but looking at the pics, they look almost identical.
Will be glad to get my L3 complete -- then I can build a rocket where the fin tips go below the bottom of the rocket. LOL.
lol, ditto here....I'm glad I'm not the only one with a fancy rocket cradle made out of a box with a notch cut in it
The Jr is a fun build. Lot's of ways to go, as in mods, with that bird. I added a GLR tailcone motor retainer to mine.Box 'o goodies from Wildman! A Darkstar Jr. to make it's first flight at Red Glare?
For some LP kits I've made horizontal stands or cradles by folding and taping the face cards to make a pair of up-pointing tees, with or without notches.I'm glad I'm not the only one with a fancy rocket cradle made out of a box with a notch cut in it
Forget the rocket ........... I'll take the GoldWing in the background!The motor fairy brought gifts!
Got my L1000 that I’ll be using for the test flight for my L3 rocket. Plus a J500 for my 3” scratch build.
View attachment 375215
It's not easy but it has been done...Meditated upon how a body made up of an elliptical instead of circular cross section would be made
Enter your email address to join: