We wait with bated breath and anticipation for the launch!
Ken
Ken
Wow, wow, wow, this is great! I'm building a scratch rocket that's kind of sort of similar (a good bit smaller) out of some shipping tubes. I'll post a picture as soon as I get a chance. The two outter tubes will hold 24mm engines and the middle tube a 29mm. I promise you it is not half as pretty as yours!There is initial information over in the Rocketry Deals Forum on this rocket. Amazon keeps selling the Estes Der Big Red Max kit (3" version of the Der Red Max) for $21.99. I ended up with a number of kits.... then got this idea and got some more...
So this is a quick (hopefully) build thread for this kit bash. I do hope to keep this light enough to fly as Class 1, BUT with (3) 29mm Motor Mounts, and the overall size, the HPR Forum seems a better fit.
I did a bunch of copy-paste out of @K'Tesh OR design file for the original DBRM. My KitBash of 3 into 1 seems like it will work... Maybe even keep it class 1 if I can keep the glue amount under control...It sims OK on (3) F15-6 motors with a 7' launch rail. 850ft apogee. (4) original Skull & Crossbones parachutes.
[ NOT Class 1 with (3) F15's, it's over the 125gr propellant mass limit. It CAN use (3) Aerotech Composite F or G motors and stay class 1. (3) F42-Blue Thunder motors with a 6' launch rail. 1050ft apogee.]
Screen shot of initial SIM and OR Image. (Final SIM file will be posted at end of Build.) [If anyone wants me to post the initial version let me know and I can...but it's rough.]
View attachment 516702View attachment 516704
Thanks.... but, that was before the rough landing, and the current dissection to gain access to replace the fin...I promise you it is not half as pretty as yours!
Oh, I understand that!! Any pics or videos of it in flight?Thanks.... but, that was before the rough landing, and the current dissection to gain access to replace the fin...
It's starting to be repaired. But after I opened it up, and cut out the rest of the fin tab, etc... I have been too tied up at work to start the rebuilding process. I do have the plan worked out, and the parts on-hand. ( Just need to time. )
Any pics or videos of it in flight?
Thanks!See Post # 32 above for screen shots, and link to YouTube Video.
Interesting.I have a set of clip-whips made up with 3' of Teflon wire to give a "little extra contact time". On the cluster flight above I did look at the igniter of the non-lit motor, and it was burnt, but only a little of the pyrogen at the bridge wire burnt, not the whole length. I don't see any burning in the launch video even when I zoom way in and slow it down. So I am assuming it burned inside the moter, but not long enough to get it lit.
https://www.frankumperformance.com/product-page/lil-jrOk... thinking of next flight after repairs are done... best way to get all 3 motors going. I have done BP clusters, but this was my first attempt at composite cluster. Everything is a learning experience...
I want to do (3) H115 DMS Metalstorm Dark Matter motors, but open to ideas.
Here is another poll...
1) Go for it with the H115 DMS motos, with starters....( ideas )
(or)
2) Stick with Aerotech SU / DMS Blue Thunder.. and augment the OEM starters (pro-cast, etc)
(Or)
2) same as above but get aftermarket starters from ...(who) [need to fit small nozzles (F, G, H, etc)
(Or)
3) use 29mm CTI motors since they have the "starter pellet".
THANKS for your thoughts, and input.
I'm finally remembering to post a picture of mine. It had 2 bad flights where only 2 out of 3 engines ignited. So it's in rebuild now, but will fly again!Thanks.... but, that was before the rough landing, and the current dissection to gain access to replace the fin...
It's starting to be repaired. But after I opened it up, and cut out the rest of the fin tab, etc... I have been too tied up at work to start the rebuilding process. I do have the plan worked out, and the parts on-hand. ( Just need to time. )
Enter your email address to join: