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Author Topic: What is required from a modern stunt engine?  (Read 1775 times)

Offline Neville Legg

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What is required from a modern stunt engine?
« on: July 30, 2008, 04:41:51 AM »
The reason I ask, is because my local model shop ( westonuk.co.uk ) produces a number of engines under the name of West.  West 36 West 51 etc. These are all very powerful R/C motors, but he wants to make them in C/L form as well. He's asked me if I can get some feed-back from C/L flyers, so I thought you lot out there might be able to help?? He has modified a few for speed flyers in the past, but that is out and out horse power!!. I only use old vintage motors in my models, and of late 4 strokes. He also produces strange light weight power pipes for these motors as well. Have a look at his website, I've told him of this site so he can check on your comments and remarks.

Cheers   Neville
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Offline Louis Rankin

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Re: What is required from a modern stunt engine?
« Reply #1 on: July 30, 2008, 12:28:38 PM »
1 - Light weight.

2 - Low RPM, High Torque timing.

3 - Low Price!!!
Louis Rankin
Somerville Tennessee
AMA 10859

Offline Randy Powell

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Re: What is required from a modern stunt engine?
« Reply #2 on: July 30, 2008, 01:21:26 PM »
Neville,

Think tractor rather than Ferrari. Low end torque and pulling power.
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 Randy Powell

Offline Gordon Tarbell

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Re: What is required from a modern stunt engine?
« Reply #3 on: July 30, 2008, 01:38:03 PM »
What Web site?
Gordon Tarbell AMA 15019

Offline Larrys4227

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Re: What is required from a modern stunt engine?
« Reply #4 on: July 30, 2008, 01:48:56 PM »
What Web site?

Looks like he meant this one:  http://www.westonuk.co.uk/

FlySafe!  Larry (Larrys4227)

Offline Tom Perry

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Tight lines,

Tom Perry
 Norfolk, Virginia

Offline John Miller

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Re: What is required from a modern stunt engine?
« Reply #6 on: July 31, 2008, 11:02:51 AM »
I checked out the site. It appears that the engines are of decent quality, and are side exhaust. The availability of a pipe from the manyfacturer suggests that they would be timed for that style of running.

I imagine that a lot will be decided by what level of competitor the manufacturer wants to attract. the money is likely to be made by catering to the sport competitor.

If catering to the sport competitor, I would suggest lowered timing and a typical 4-2-4 break. There are a lot of engines being manufactured today to that standard. An alternative would be the so called 2-2-2 running engine. More of your high rpm, low pitch style of run.

The sport competitor will be most impressed with value for his money.

The weight of the total package will be important.

Americans prefer to run some amount of nitro in their fuel. I persoanally like to run FAI fuel in the engines I use. The answer would be to provide good instructions and additional head gaskets.

If catering to the all out competitor, one who tries to compete in the upper ends of the pileup. I suggest looking at the top competition engines in the world.

Look at Randy Smiths PA series, or the Ro Jett engines from Richard Oliver for ideas for a piped style of run. Remember, these engines also run well using a muffler.

For something in the Classic 4-2-4 run, take a look at the Stalkers, and Belkoff's (sp) designs.

There will almost always be a place for side exhaust engines in Stunt, but notice that at the high end of competition, rear exhaust seems to rule.

These are all choices the manuifacturer will, or should consider when making the decision to  break into this small competitive market.
Getting a line on life. AMA 1601

Kim Doherty

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Re: What is required from a modern stunt engine?
« Reply #7 on: July 31, 2008, 01:08:25 PM »
I think anyone looking to invest time and money in a "money making venture" in C/L PA for either sport or all out competition might want to look over their shoulder at the train that just just hove into sight down around the bend. Hunt described it in Spain as:


EEEE.........LECK..........TRIH..........CITY!!!,  EEEE.........LECK..........TRIH..........CITY!!!


He was trying to convey a slightly different message at the time but the words were prophetic none the less.

Kim   :)

Offline kdheath

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Re: What is required from a modern stunt engine?
« Reply #8 on: July 31, 2008, 05:57:09 PM »
For this sport flyer, light and easy hot restarting.
Maybe follow the Horizon lead and supply extra venturis, or at least make them easy to get. Just glad to hear that someone else is considering new CL engines.

Offline Neville Legg

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Re: What is required from a modern stunt engine?
« Reply #9 on: August 06, 2008, 09:55:26 AM »
Thanks for your input chaps! I popped in to the model shop today and the proprietor, Alan Greenfield has already started to modify one of his West 36 2 stokes for stunt use!! As I'm the only C/L flyer he knows in this area, I'll probably get to test it! We shall see??? Then I'll pass it on to somebody that knows what they're doing!  **)

Cheers   Neville
"I think, therefore I have problems"

(not) Descartes

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