Correct. They call the APCP stuff motors and the BP stuff engines. IIRC the casing of Estes A-E motors have both words on the labels now.

The use of the word engine while not technically correct is valid simply because they have been calling them that for several decade and changing the term completely would possibly be confusing to low information users.

The fact they adopted the term motor at all over the past several years is a step forward to rhetorical accuracy.

The morph of the product line to increasingly duplicative designs differentiated only by colors, is an interesting inventory control development. The "fantasy" rockets on the cover are a wink to the "good old days" whether or not they actually sell. The thing I take away from this catalog is just how indestructible certain rockets are. Alpha, Alpha III, Maxi-Alpha, Big Bertha, Wizard, Viking, Yankee, etc. Some rockets simply have a steady following over the course of decades!

The A10-PT is the rocket car motor I presume. That back cover has the distinct flavor of future vaporware..

Jerry

That kit disappeared off the Estes site in July. You can still find it at several other web sellers though.

In fact, isn't 2015 the 50th anniversary of the K-23 Big Bertha kit?

__________________
Rich Holmes
Camillus, NY
Secretary / newsletter editor
Syracuse Rocket Club

http://richsrockets.wordpress.com

I am still surprised the Super Alpha did not sell better. BT-60 is the most practical size for this design. Maybe it is the "wrong" nose cone after Estes went back to plastic. Maybe it should have had a 24mm motor mount instead of 18mm.


Bill

__________________
It is well past time to Drill, Baby, Drill!

If your June, July, August and September was like this, you might just hate summer too...

Please unload your question before you ask it unless you have a concealed harry permit.

: countdown begin cr dup . 1- ?dup 0= until cr ." Launch!" cr ;

Give a man a rocket and he will fly for a day; teach him to build and he will spend the rest of his days sanding...

Agreed 24mm would have been great. Maybe it's time for a 29mm Bertha with slide ring parachute to assure safe deployment with the heavy casing.

Bertha
Mini-Bertha
Ranger
50th Anniversary Bertha

Where's the 24mm and 29mm Berthas?

Tech Jerry

Well, there was the Super Big Bertha and its brother, the Broadsword...


Bill

__________________
It is well past time to Drill, Baby, Drill!

If your June, July, August and September was like this, you might just hate summer too...

Please unload your question before you ask it unless you have a concealed harry permit.

: countdown begin cr dup . 1- ?dup 0= until cr ." Launch!" cr ;

Give a man a rocket and he will fly for a day; teach him to build and he will spend the rest of his days sanding...

Slide ring?

__________________
Never trust an atom. They make up everything.

4 out of 3 people struggle with math.

Chemically, alcohol IS a solution.

NAR# 94042
SAM# 0078

ANYTHING BT-60 and above should have a 24mm mount standard.
Include an 18mm adapter.

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !

A slide ring is a key ring on a nylon chute or a multilayer paper ring on a poly chute slid all the way to the canopy, on the shrouds, on folding that when deployed prevents the parachute from "explosively deploying", and slides down on deployment to gently open the canopy and thus let it deploy over seconds rather than milliseconds.

You could also use a short piece of BT-5 or BT-20, say 1/4"+.

"Slide Ring" Tech Jerry

also cite:
https://www.google.com/search?q=sli...hute+slide+ring

Ah so. It works like a shock absorber.

__________________
Never trust an atom. They make up everything.

4 out of 3 people struggle with math.

Chemically, alcohol IS a solution.

NAR# 94042
SAM# 0078