Rocket Dad
Going to be building the MadCow Skipper kit this summer.
It will be my first kit with a boattail. After looking at the kit I am concerned about motor retention, especially since I do not want to lose my 29/40-120 casing. Anyone have any tricks up their sleve?
Thanks
High on AP and sparkies
What is the size of the ring? If so, just use a bolt, blind nut, and washers.
Edit: I didnt see it was a boattail rocket. If so, check out GLR slimline tailcone retention system. A little bit pricy, but worth it.
Matt Tripoli Junior Member# 14257
2013 motors:
AT 38-360 H178DM (283ns)
CTI Pro-29 3 Grain 138G106-14A (138ns)
CTI Pro-29 1 Grain 55F29-12A (55ns)
Estes C6-5 (9ns)
Estes B4-2 (4ns)
Total Newton Seconds for 2013: 489ns
2.4% of N5800
Largest Motor flown: Aerotech H178DM (38-360)
Wildman VA
I have a GLR slimline on my Talon 2 (boattail) and like it a lot. The slimline has a ring that slips into a groove. Some have trouble getting the ring in and out, but I have had no problem.
But it looks like you have plenty of room back there for an aeropack, which just screws on and off. I used to make my own retainers with screws and blind nuts, but as my rockets and cases got bigger and more expensive, the cost of a machined retainer became less of a factor.
If you do go with a screw, a threaded insert might be a better choice than a blind nut. You would need to drill a 1/4" hole in the rear of the boattail.
http://www.mcmaster.com/#standard-th...nserts/=hmsw32
Kevin Dunn
Hovar.org
WildmanVA.com
NAR L1 Oct 2010 Battle Park
TRA L2 Mar 2012 Battle Park
Total 2013 Impulse: 892 Ns (39% J)
2013: 6 Motors Burned: ((164+110+93)+(0)+(108+159+258))/640-1
Total 2012 Impulse: 8104 Ns (58% M)
2012: 33 Motors Burned: ((166)+(217)+(229+648+168)+(110)+(93+125)+(108+160 )+(160+159+258+1874+108+159)+(125)+(138)+(315+159) +(166+164+298+168+168+660+159+282)+(229+56+52+107+ 116))/5120-1
Lv 1
I used an Aeropack retainer on my jayhawk. I did recess it about an 1/8".
rex
Certified Rocket Monkey
Is this kit a souvenir from the TCC Dairy Aire launch? LOL!
Kit (AKA Cranky Kong)
Total Total Impulse as BAR: 7,753.69 Ns (Equivalent to a 51% M motor.)
=| Calirado, Colofornia...what's the diff anymore? |=
Rocket Dad
No picked it up on EVILBay a while back. LOL ...Originally Posted by o1d_dude
Rocket Dad
Also making this my first zipperless design using paracord.
Question: How much paracord should I use from the aft bulkhead/baffle eye bolt to the parachute and then how much from parachute to forward bulkhead eye bolt?
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