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aeppel_cpm
08-22-2016, 06:06 PM
My latest downscale.

The intakes are printed on cardstock and then folded up.

Can't wait to put some 13mm Bs in it.

http://i328.photobucket.com/albums/l322/cpm4/Rocketry/2F3725BA-A38C-4FD4-8523-1CDD5136E68F_zpsxnq6thom.jpg (http://s328.photobucket.com/user/cpm4/media/Rocketry/2F3725BA-A38C-4FD4-8523-1CDD5136E68F_zpsxnq6thom.jpg.html)

hcmbanjo
08-23-2016, 10:43 AM
Wow! Charles,
After building a few of the larger kits, I would think the cardstock intakes would be much easier. Great work!

P.S. Where are you going to find the 13mm B engines? Unless you've got some stored away -

aeppel_cpm
08-23-2016, 11:06 AM
I went through about 5 versions, trying different cutout and fold ideas. Even so, they didn't turn out quite square. I forgot to compensate for the thickness of the cardstock in the forward part that rolls into a tube.

After that, it's a bunch of tiny work, trying not to stick everything including fingers together with CA. The fins are 1/32" balsa with a cardstock wrap.

http://i328.photobucket.com/albums/l322/cpm4/Rocketry/2B77B739-20EE-4AD9-BA56-E9C90B3722A3_zpspxqlmnvk.jpg (http://s328.photobucket.com/user/cpm4/media/Rocketry/2B77B739-20EE-4AD9-BA56-E9C90B3722A3_zpspxqlmnvk.jpg.html)

Up close, the intake mounting is a little sloppy. Maybe I should have used 5min epoxy.

I bought a case of Centuri B4-3s from a collector. And then signed up with the expired motor program so I can legitimately fly them at WOOSH Bong launch days.