Was that the standard back then? I just assumed 2.75".

__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Centuri Design Contest F-150 Hurricane Estes - Low Boom SST Semroc - Marauder, Shrike, SST Shuttle

In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Multi-Roc, Solar Sailer II Semroc Cyber III

Ready to fly: Estes - Solar Sailer II Semroc - Earmark, Groonie Der V 1/2

There may not have been a standard.

Looking at that 1964 catalog, I didn't see the pages that list tubes and nose cones. But there is a "Designers Assortment" that lists TB-714 4-inch "booster tubes."

The 1965 catalog "Apollo Custom Parts Special" lists ST-71B "booster tubes." Those were 3.75-inches.

If you get the proportions correct, I'd say your "sport scale" clone would be about right.

__________________
-Wolfram v. Kiparski
NAR 28643 - TRA 15520
MTMA Section #606 President

Nice! I've never seen either of those fly, let us know how it goes. Cloning the Cyber III has been on my (long) list for a while now.

__________________
Paul
If we weren't all crazy, we would go insane - Jimmy Buffett
NAR #87246 www.wooshrocketry.org

Here are pertinent pages from the 1964 catalog that appear to be missing in the Ninfinger catalog.

Looks like there are ST-7 tubes in the 2.25", 3", and 3.5" sizes.

I think the nosecone is probably going to be the BC-74 (top of page 30). Also, your 'outer' tube coupler is probably the CT-7B listed on the bottom of page 31. These would be before they were 'ported' with two holes 180 degrees apart and called the 'Passport' stage coupler which was introduced around 70-71 timeframe.

Earl

Attached Files

	Centuri 64 Catalog Scan 29-30.pdf (1.10 MB, 38 views)
	Centuri 64 Catalog Scan 31-32.pdf (1.05 MB, 31 views)

__________________
Earl L. Cagle, Jr.
NAR# 29523
TRA# 962
SAM# 73
Owner/Producer
Point 39 Productions

Rocket-Brained Since 1970

So NOBODY out there has Instructions?

I think this was a one year only kit, and from 1964 at that. Not a big surprise that it's not represented out there. I don't know of anyone who has even seen a kit. (That's a big part of the attraction.)

__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Centuri Design Contest F-150 Hurricane Estes - Low Boom SST Semroc - Marauder, Shrike, SST Shuttle

In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Multi-Roc, Solar Sailer II Semroc Cyber III

Ready to fly: Estes - Solar Sailer II Semroc - Earmark, Groonie Der V 1/2

The picture of the Aero-Dyne in the 1964 catalog looks like there is one of those external "passport" staging couplers on at least the top of the second stage. Looking at instructions for the Micro-Probe and Arrow 300, the standard construction for a booster seems to be:

1. An airframe tube,
2. An engine block glue to the airframe so the nozzle end of the engine is flush with the end of the airframe,
3. Topped off with the staging coupler.

If the Aero-Dyne had the same construction as other Centuri staged model rockets (witht eh exception of the Black Widow) this arrangement suggests a booster length of 3-inches.

Interesting project.

__________________
-Wolfram v. Kiparski
NAR 28643 - TRA 15520
MTMA Section #606 President

Was the T-Bird the successor to the Aero-Dyne?

So, three fin or four?
Or should I say, nine or twelve?
I'm thinking four, just because of the rockets that came later.

__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Centuri Design Contest F-150 Hurricane Estes - Low Boom SST Semroc - Marauder, Shrike, SST Shuttle

In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Multi-Roc, Solar Sailer II Semroc Cyber III

Ready to fly: Estes - Solar Sailer II Semroc - Earmark, Groonie Der V 1/2

Looks like 3 (9) to me. I'm going by the spacing between the fins on the BT.

And because you said 4.

__________________
I love sanding.