18 mm 3 stage

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cerving

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Sounds like you need a tracker that will fit in that... :wink:
 

neil_w

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Wow. :eyepop:

I set all the finishes to "polished" and got another 500' out of it. :)

Would you need to do something special to mount the 1mm fins to the BT? That's not a lot of surface area to hold on.

You should definitely build this, and take a lot of good pictures of it *before* you launch.
 

TRFfan

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Wow. :eyepop:

I set all the finishes to "polished" and got another 500' out of it. :)

Would you need to do something special to mount the 1mm fins to the BT? That's not a lot of surface area to hold on.

You should definitely build this, and take a lot of good pictures of it *before* you launch.
Yea....thats the reason I designed this...i bet i could build it for under 20 dollars (not including motors, since i already have them). I just need a set of Bt-20s, a set of NC-20s, and a sheet of 1 mm plywood, all which i can get at my local hobby store for under 15$. I already have all of the other supplies so building it should be easy.

And no, i think wood glue would be sufficent for holding the fins on. Every time I've built a rocket Ive had the fin fail before the bond.
 

neil_w

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I tried the optimization and it added a few more feet with nose weight down to about .25 oz. Currently simming at 4299 ft and 504 mph (!).

This is fun! :)
 

TRFfan

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I tried the optimization and it added a few more feet with nose weight down to about .25 oz. Currently simming at 4299 ft and 504 mph (!).

This is fun! :)
Ya, and since you can build it for less than 15$ that makes it even more fun! :)
 

TRFfan

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But dont the motors have to be touching each other to light each other?
 

neil_w

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You can gap stage if you add vents to the top of each booster. Those vents will add a bit of drag if course and cut into your 4000' flight. ;)
 

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