I have the parts collected and partially cut out for an ESS Raven clone, but I've planned for it to be D or E powered from the start.
But I also bought some Silly Putty when I was buying my engines on Saturday so that I could try my hand at a BT-60 upscale. (It was right there at the checkout, just calling to me. )

__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Centuri Mini Dactyl Estes - Low Boom SST Semroc - Marauder, Shrike, SST Shuttle

In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Multi-Roc, Solar Sailer II, Xarconian Cruiser Semroc Cyber III

Ready to fly: Estes - Solar Sailer II Semroc - Earmark, Groonie Der V 1/2

Don't forget Quest is coming out with their 18mm D which would work great with these large 18mm designs Craig has.

I haven't seen any loaded motor weight specs yet, bet the empty casing I held at NARCON felt lighter than an empty Estes paper 18mm casing.

__________________
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

Did you try the sim with a C6-3? Also, try it with Quest C6 motors. They are different from Estes C6's.

__________________
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

George,

I think you meant to direct your message to Bill or Craig. Anywho, if you send a zip of your rkt file to Craig or attach it to a message here, we can include it on the BARCLONE website.

__________________
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

Scott,

Tried the Estes C6-3 just now on the 741 version. This actually works better, deployment is pre-apogee, about 4' before max altitude, with a 22.5 fps deployment velocity. Still requires a 76" launch rod, however. It's the degree of kick at ignition. The C5 had plenty, the C6 is terribly weak for this model. The model weight is 4.7 oz with the C6 loaded, and 3.9 oz empty.

Using the Quest C6-3, the performance was about the same, maybe even a bit less overall, but there is a big difference in the kick off the pad. It gets to flight speed at 47".

I'd like to see that Quest 18mm D when it becomes available. As long as it has the kick of the C5, these models should perform better. If the C5 can get 400', then a D should easily get 600'-750' without any trouble.

Craig

Hey Craig, have you tried any of the RMS 18mm D's or the single use D21? I bet that D21 will do the trick.

__________________
Quando Omni Flunkus Moritati

I just ran the Aerotech D13 and D21 motors, and got some good results:

D13 reaches flight V at 25", the D21 reaches flight V at 17"...

D13 deployment V is 47.5 fps, D21 deployment V is 30.9 fps...

D13 altitude is 1008', D21 altitude is 1037'...

HOWEVER...

D13 Max Acceleration is 477.4 fps/s, and Max V is 325 fps, but the D21 reaches 744 fps/s, with Max V at 392 fps. Both of these may kill the model before it reaches altitude...

Craig

I would think it would survive the D13, but the D21 is a monster. I watched a Little Ivan do a strip tease yesterday on a E25, which is just s slightly hotter D21.

BTW - D21's are excellent motors for the Centuri Argus and Estes Interceptor.

__________________
Quando Omni Flunkus Moritati

Just ran a quickie on these numbers...

D13 = 221.6 MPH...

D21 = 267.3 MPH...

Someone with more technical flight experience can suggest whether this might result in a shred for this design. The model as-designed does not use TTW fins. This might be an issue with 1/8" balsa...

TTW and 3/16" balsa might be a better construction choice...

Craig

Is that for an original, unmodified Interceptor, or one that has been engineered for high-acceleration boosts?

Craig