Need Advice for Upscale Groove Tube
 

I finally flew my Centuri Groove Tube from 1970-something. What a great launch! I did a search for upscale Groove Tubes and found some high powered upscales but I didn't want something that challenging. Excelsior has decals but I wasn't sure how big the actual rocket would be.

I'd probably want to make something a bit bigger that would take a D engine but I'm not sure about the parts to get get. Any suggestions?

Wallyum's BT-56/ST-13 Groove Tube 1.76 upscale
 

This should get you where you want to go:

http://www.rocketreviews.com/scratc...chelberger.html


You're welcome. ;) :D :cool:

Dangit! You beat me to it! :D

The one I just finished building (ready for paint now) is BT-60 and is a kit bashed Mean Machine. You end up with just a little tubing left over (you can get three tube fins from one 18" length). I put a 3.75" 24mm motor mount in it so i can fly it on E9s and, using a spacer, 24mm AT reloads. I have a build thread over on TRF.

Greg

BT-56 tube and nose cone. I believe they're an original Centuri part and readily available from placed like Hobbylinc. http://www.hobbylinc.com/htm/est/est303164.htm Centering rings and internals would just be standard rings that fit the BT-55. Semroc should be able to help you with the BT-56 tubes and motor mount parts. Give a thought to going with an E motor. You can always use an adapter for C and D flights.
DON'T FORGET THE NOSE WEIGHT!!!! ;) :cool:

"Thank you, Komrade Beel..."
 

(Russian accent) "Is because I am beeg fan, for many years." ;) :D :cool:

That was a cool rocket, and Greg's build got me thinking about doing another one, possibly on a BT-70 scale. Lots of other irons in lots of other fires at the moment, but someday this winter. :cool:

I wrote two articles for our club newsletter last year on cloning and upscaling the Groove Tube.

See,
http://www.masa-rocketry.org/planet..._13-Issue_2.pdf
and
http://www.masa-rocketry.org/planet..._13-Issue_5.pdf

Thanks, Alan! Nicely done! ;) :D :cool:

Cheers,

That's what I'm looking for! I love the upscale PDF! I'll have to take a look to see what parts I have to get and get the decals from Excelsior.

The original was impressive on a B6-4. A D or E engine would be an AWESOME launch!