Strange Body Tube

[Hospital_Rocket]

Anybody ever hear of a BT3? According to Totally Tubular it is a 3/8" tube. This is smaller than a 10.5mm motor. Any guess on what motor would have fit in this? The design is the Pee Wee and dates to 1961.

A

 

[doug_man_sams]

Art,

TT's T-3 is used in scale models I believe. There aren't any motors that fit it.

The T-3 in the PeeWee plans is the original designation for what was later called BT-30, which BTW TT now sells as does ARG in Canada.

If you look at some of the early Estes catalogs on ninfinger, you can find BT-3 listed.

HTH.
Doug

 

[Hospital_Rocket]

Cool, a BT30 I can stuff a motor in.

Thanx

Al

 

[sandman]

The BT-3 has a very limited use but is "useful" for cloning some models.

It's used as the multiple engine tubes on the Space Cruiser Excalibur kit #1339 (good guy)

https://www.dars.org/jimz/est1339.htm

And on the Dragonship7 kit #1345 (bad guy)

https://www.dars.org/jimz/est1345.htm

But it's "original use was for the 1/70th scale Apollo Capsule escape motor used with the 1/70th Apollo Capsule, 1/7th Saturn 1B and the 1/70th Little Joe II.

https://www.dars.org/jimz/est1345.htm

The Totally Tubular T-3 is the old Estes BT-3 (.375" O.D./.349" I.D.)NOT the BT-30

 

[Stymye]

bt-3 is what all those motor tubes in the back of the Estes space cruiser excaliber are ,, that kit also uses the bt-63 to contain them.

I bought a batch of them as a plan to clone it and build a few micro models

 

[Stymye]

whoops ok Sandman covered that info

 

[sandman]

beat ya!!

Oh! yea...i built them too!

 

[stl1951]

I am just finishing up MicroMaxx clones of the
Space Crusier Exclibur and the
Dragon Ship 7
May be my next kit releases.

 

[Micromeister]

Originally posted by Hospital_Rocket
Anybody ever hear of a BT3? According to Totally Tubular it is a 3/8" tube. This is smaller than a 10.5mm motor. Any guess on what motor would have fit in this? The design is the Pee Wee and dates to 1961.

A

Al:
Totally Tubulars T-3 is .375" OD .349" ID with .013" white craft paper tubes in 34" long sections.

They are Wonderful size tube for downscale Micro-Maxx powered models. T-3 has proven to be a great Airframe size allowing good detailing and less weight then T-4 .448" (10.5mm tubing) for micor models. My recent micro powered Scissorwing transport is a T-3 body with T2+ ejectable pod. Totally Tubular also carries T2+ to T3, T4 & T5 (Bt-5) diecut Fiber centering rings.
These tube allow larger OD models powered by micro motors that achieve decent altitudes 100feet and up. I lost a T-3 Nike smoke out of sight
Hope this helps.

 

[Micromeister]

Al:
Over the weekend I through together a bunch of Micro tubes and related scratch building materials took a photo, labled the parts so folks can see whats actually out there. all you need to add to this photo is some fin stock. 3/64th ply, 1/16th balsa or basswood, .020 or .030 styrene sheet , 110lb cardstaock or .030 clear lexan and you in the MicroMaxx building business
Hope this helps