I am looking for a magazine with a .40 size engine shootout that is maybe 30 years old. It had a comparison of maybe 20 or 30 engines from the Stas's to OPS to most things available at the time. The cover was red and I think a Zues engine was on the front. Maybe MAN or RC modeler.
Any info would be appreciated. I just spent about four hours going through my old mags and can't find it.


Max

Model Aircraft News March 2001 page 44:

http://www.rcfaq.com/RPMSTATS/RPMBYCC1.HTM

I'd be interested in that old report too because I've got one of those Stas's 42's and I'd like to see how it rates amongst engines of that age. It's horrible!

Hi!
MAN did a "Shoot out" on many .40 two strokes in the middle or late eighties...still have the magzine somewhere.
What do you want too know???

Actually, I'd like to get a copy of the article or magazine. If you can give me the date of the issue, I may be able to get one from MAN archives. Or I would buy yours if you wanted to sell it.

Max

MAN July 1994, Red cover, featured "exclusive engine guide 32 2 - stroke engines..." It did haveZeus, Fox. etc. on cover. Ihave anoriginal copy of the issue. Also, MAN April 1986featured a "Big engine shootout of 2 stroke .60 and .61s. I have a copy of that also.What would you like to know from either of these?

Sincerely,

Richard

The September 1986 issue of R/C Report had their "shootout" of 26 40 sized engines with RPM and thrust ratings, etc.

Engines reviewed: Rossi, Webra Speed, HB 40, Enya 40 CXTV, OS 40 FSR, OPS 40, HB, K&B PUMP,OS 40 FSRABC, Fox 40, Picco, Irvine, Supertigre 40 ABC, HP 40 Gold Cup, Royal 40, COMO 40 Webra Siverline, Thundertiger 40, Webra Blackhead, Como 40 Ring, Supertigre 40 Bullring, Supertigre S40, OS 40 FP, DH 40 ABC, K&B 40

This article must be different from the one you want.

I believe the MAN article said the Fox .40 was the outstanding one, with the MKX carb.

Thanks guys,

the article I was looking for was the July 1994 MAN. I found a copy of it in their archives but, alas, it was just specs and prices. No performance ratings. I'll check out the other articles mentioned.

Max

Hi!
What is it you want to know?
Todays .40 sport engines are more or less equally when it comes to power in a sport airplane.
For straight out power, in pylonracing, running 80/20 fuel and a 10x6 prop, nothing beats the Webra .40 GT! Thats the engine of choice over here in Sweden in Q-500 pylon racing and has been for several decades.

Runner up is the ASP.40 (Kyosho .40 GX) which is a very good engine when it comes to swinging large props. It can handle a 12x6 APC without problems.
Both these engines swings a 10x6 RAM or Graupner at around 14000-15000rpm on just 80/20 fuel.

OS FX .40 , TT.40 PRO SE and SK .40 are also good engines and are very userfriendly, and they all turn the 10x6 RAM and Graupner props at around 13600-13800rpm.

Sadly FOX .40 engines are no good compared to the above engines.

"OS FX .40 , TT.40 PRO SE and SK .40 are also good engines and are very userfriendly, and they all turn the 10x6 RAM and Graupner props at around 13600-13800rpm."
"Sadly FOX .40 engines are no good compared to the above engines."

I don't know what Fox .40 you have used but mine swings a 10X6 at 14,500 RPM on FAI fuel.

I still have 2 Fox .40's that have always run strong since new, one dates back to the 80's. Both are still in use today, one in a Telemaster .40 and the other in a Sig Kougar. They are powerful and light and I love them. Both have the 2 needle carb.

P.S. I have also run and own O.S. and Supertigre with great results, too.

I put a perry pump on a Supertiger Blue head S.40 and it screamed. That big carb that came on them was as big a a .60 tiger carb I think! The engine had many hours on it when i put the perry pump on it. I think a loose engine sometimes will rev more. If it is a Supertiger!! Capt,n

The .60 engines shootout Dave Gierke did in MAN 05/03 is quite outdated, since several of its runners have been discontinued, superseded, or changed.

Several of the .40 group tests some mentioned in this thread are even more so.

A group test can only have validity, if anyone can order all, or most of the exact, same engines NOW.


I strongly suggest to Dave Gierke, Clarence Lee, Mike Billinton and the other engine guys at MAN, to do a repeat .40 group test that will be valid for the next couple of years.


It seems the .40 size has, for many, changed to a .46-.55... And some new .35-.40 engines use a .25-size frame...

If such a group test is done, it must be stringently displacement limited... Only .38-.42 cid engines must compete.
One cannot fairly 'compare' a .40 to a .55... and then 'be surprised' that the larger engine is more powerful...

Displacement is still the main criterion that separates engines into groups.

Interestingly the Fox .60 won this ShootOut.

It is amazing how many manufacturers have changed their engine designs and chased rainbows. While Fox hasn't had to change their designs for more than 25 years, to have powerful engines that are still quite competitive.