Looking for article on the "Doctor"

Anyone know which issue of Stunt News had the article on Ted Fancher's "Doctor"? All I can find out by searching the various forums was that it was several years ago. I would like to order the back issue, or if anyone has a copy of the article in an email-able format could you send me a copy?

Thanks in advance,
Ed N.

It's in the May/June (Issue 3) 1998. It's a detailed and very comprehensive article with a good touch of Ted's humour and huge licks of good advice.

>Anyone know which issue of Stunt
>News had the article on
>Ted Fancher's "Doctor"? All I
>can find out by searching
>the various forums was that
>it was several years ago.
>I would like to order
>the back issue, or if
>anyone has a copy of
>the article in an email-able
>format could you send me
>a copy?

ME TOO...
Ted, do you have the original in Word?

Sorry guys,

I've re-computerized a couple of times since the DOCTOR and don't have anything in file on it. PAMPA Products should be able to supply copies...as well as plans.

The original is now flying well with an OS .40 Surpass (four stroke). This is pretty much the best combination I've found yet. If you're into building a new one give it some thought. The OS .26 or SAITO .30 for the MEDIC would also be great combos.

For what it's worth, the .40 is a lot more consistent with a reduced venturi choke area. I simply JB Welded one size smaller aluminum tube into the throttle barrel and most of the inconsistencies of the run disappeared. for some reason, the .26 doesn't seem to mind the fairly large sized venturi.

If you go the 4 banger way I suggest setting the needle for peak power and doing the prop-pitch-dance and line-length-polka to find a nice combination. I'm using the three blade Tornado 10 X 4 on the .40 and it is happy as a clam.

Ed: I have a copy of the article, and can make a copy of it if you like.

Ted,
Is there any deep reason why you didn't just use the built in throttle on the Surpass and throttle it down?

>Ted,
>Is there any deep reason why
>you didn't just use the
>built in throttle on the
>Surpass and throttle it down?
>
>
>Alan
Hi Alan,

Yeah, there is...although I don't know just how "deep" the reason was.

My experience with four bangers has been that they've all got much bigger choke areas than necessary for our needs (the little guys less so than the big ones). I've also felt there has been inconsistency in the runs even when throttled down.

I've theorized that some of this inconsistency is the result of ambient air being able to bleed through the space between the steel throttle barrel and the cast throttle housing. This is usually a nicely machined interface but isn't air tight. I attempted to seal this area with high viscosity oil without long term success. On the .26 in my Ringmaster I simply glued the barrel in the housing with silicone sealant. The engine run immediately evened out.

In addition, every "pro" stunter with whom I've talked who has seriously developed these engines for stunt has replaced the throttle with a conventional venturi. That is, in fact, what I'm doing with the .52 Surpass I'm preparing for my KA-10 Rooskie Stunter which should be in the air next spring.

Ted,
Thanks for the reply.

It got me wondering if some of the inconsistancy you mention might be related to the air bleed on the carb., which is normally used in RC to keep the mixture lean enough when the engine is throttled down. Of course the high speed needle is set at full throttle. In CL the air bleed can be turned off (by screwing in the adjustment screw (or just capping it off with some JB Weld). Then one can just needle the engine at any setting.

Of course, once you have a venturi you are happy with, why worry?