13mm lament

[Coop]

I don't know about ya'll, but I find it unfortunate that with 13mm motors, there are no choices besides the Estes offerings. Personally, I'd like to see some APCP 13mm's. Would a full B or small C be too much to ask?

Apparently...


Vent over.


Later!

--Coop

[Peter Olivola]

They were fun when they were available, but there isn't enough market at the price they have to be sold at to justify manufacturing them. When they were available they were manufactured by Aerotech in a batch that was pre-paid by Ed LaCroix when he owned Apogee. I don't know if he'd consider it, but Gary would probably only do it on the same basis again.

[Aksrockets]

Dang you got be day dreaming......
An estes gnome on a C engine!

Alex

[GDJ]

Dang you got be day dreaming......
An estes gnome on a C engine!

Alex

Oh yeah!


Actually gram for gram, the 13mm engines have a phenomenal performance rating. Having a small minimum diameter rocket with one of those (I love the A3's) and getting up near 1000 feet is not out of reach.

And they really are cheap thrills!

[MarkII]

http://www.nar.org/SandT/pdf/Quest/A3T_cn.pdf

I don't know when or if these will become available for regular consumers.

[GDJ]

http://www.nar.org/SandT/pdf/Quest/A3T_cn.pdf

I don't know when or if these will become available for regular consumers.

Love the specs on that motor. That would work great on a Quark!

[MarkII]

Love the specs on that motor. That would work great on a Quark!

Yeah, a two-second A! I suspect that these were made in a limited run for FAI competition. You would need to have one very lightweight rocket to have a successful flight with a motor that puts out 0.82 N-s average thrust for over 2 seconds.

[Initiator001]

The AeroTech/Apogee B7 13mm motors were fun but expensive. I once clustered two B7s for 'C' eggloft at a NAR contest in Los Angeles. Dual Copperhead igniters and both worked fine. The model screamed off the pad! Too bad I didn't secure the egg capsule to the booster better because as soon as those two B7s burned out, the egg capsule kept going while the much lighter booster seemed to stop. Out came the parachute for a very low opening altitude. The ejection charges burned through the paper shroud which formed the booster section. Still, pretty cool!

Apogee also had an C6 motor in 13mm. I still have a few of those around somewhere...

[GDJ]

Yeah, a two-second A! I suspect that these were made in a limited run for FAI competition. You would need to have one very lightweight rocket to have a successful flight with a motor that puts out 0.82 N-s average thrust for over 2 seconds.

My daughters have a few very light rockets that would work.

[Rocketjunkie]

Dang you got be day dreaming......
An estes gnome on a C engine!

Alex

If you are into the dark side...

This is a 13mm reloadable full D40. Gets a Gnome to 1000 mph in .4 seconds

The C20 is 2" shorter.

[shreadvector]

i strongly suspect that the ejection charges did not burn through the paper shroud and that the "delay afterburn" or "Hibachi effect" was what burned through the paper shroud. It is HOT and PROLONGED (and did I mention it was HOT??).

The AeroTech/Apogee B7 13mm motors were fun but expensive. I once clustered two B7s for 'C' eggloft at a NAR contest in Los Angeles. Dual Copperhead igniters and both worked fine. The model screamed off the pad! Too bad I didn't secure the egg capsule to the booster better because as soon as those two B7s burned out, the egg capsule kept going while the much lighter booster seemed to stop. Out came the parachute for a very low opening altitude. The ejection charges burned through the paper shroud which formed the booster section. Still, pretty cool!

Apogee also had an C6 motor in 13mm. I still have a few of those around somewhere...

[Coop]

I was thinking something ridiculous, like a C-2. I understand about manufacturing cost and marketability.... just wish that weren't so. **heavy sigh**


Later!

--Coop

[MarkII]

There was a company called Green Monkey Aerospace that produced EX motor hardware in a variety of diameters, including 13mm. (Reloadable 13mm motors!) They were in business until quite recently but their website does not seem to exist anymore now.

[mikemech]

I'd like to see longer delay times. I have some cluster / multistage designs but RockSim shows them ejecting while still climbing at 30-40m/s.