Starting inverted four stroke.

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carl anderson - 11 Jul 2004 05:00 GMT

I have installed my Saito 40 inverted and it runs fine but is difficult to
start.
Has anyone experienced this problem.
It does seem difficult to prime , and if I use an electric starter it start
much easier.
Thankyou
Carl Anderson

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Dr1Driver - 11 Jul 2004 16:01 GMT

>it runs fine but is difficult to
>start.

Make a cradle to allow you to invert the plane for starting. Then turn it
upright to make the final adjustments.

Dr.1 Driver
"There's a Hun in the sun!"

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Len Cuff - 11 Jul 2004 19:49 GMT

>>it runs fine but is difficult to
>>start.
[quoted text clipped - 4 lines]
>Dr.1 Driver
>"There's a Hun in the sun!"

Got a SC120 four stroke inverted in a P51 and it's no problem to
start. Never had to put it the right way up!

cheers,
Len

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Paul McIntosh - 11 Jul 2004 23:31 GMT

Same with my OS and YS .91s. Spin them with no glow until a little vapor
comes out hte exhaust, thel light the glow and they fire instantly.

--
Paul McIntosh
http://www.rc-bearings.com

> >>it runs fine but is difficult to
> >>start.
[quoted text clipped - 10 lines]
> cheers,
> Len

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JohnT. - 11 Jul 2004 20:44 GMT

I've got a OS .52 in a rascal 40, likes to be started right side up for
the first flight of the day, the rest of the time inverted is OK.

I also have a Saito 150 in a Great Planes super stearman, hand prop it
just fine inverted.

John

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John N. Kessler - 12 Jul 2004 04:18 GMT

I don't usually need to prime my inverted 4stroke engines. I close the
needle valve when fueling, then open it up to start, but somewhat lean. As
soon as it fires I richen up the needle to fly.

opinions will vary, jk

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Six_O'Clock_High - 12 Jul 2004 05:38 GMT

I don't bother with the needles, just heat and swing the prop.

> I don't usually need to prime my inverted 4stroke engines. I close the
> needle valve when fueling, then open it up to start, but somewhat lean. As
> soon as it fires I richen up the needle to fly.
>
> opinions will vary, jk

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John N. Kessler - 13 Jul 2004 04:33 GMT

I close the needle valves because I just use a third line into the tank to
fill and then plug it off at the cowl with a fuel dot. I don't use any kind
of fueling valve.

If I don't close off the needle valve fuel will run into the engine and
flood it.

opinions will vary, jk

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Six_O'Clock_High - 13 Jul 2004 05:59 GMT

> I close the needle valves because I just use a third line into the tank to
> fill and then plug it off at the cowl with a fuel dot. I don't use any kind
> of fueling valve.
>
> If I don't close off the needle valve fuel will run into the engine and
> flood it.

Yeah, that could be a problem <G>

> opinions will vary, jk

Do tell! <VBG>

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Model Forum / Radio Controlled / Air Models / July 2004

Starting inverted four stroke.