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#Post#: 62491--------------------------------------------------
Re: Unusual Porting
By: ch74 Date: September 30, 2015, 5:49 pm
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Thanks man.
#Post#: 62503--------------------------------------------------
Re: Unusual Porting
By: 660magnum Date: September 30, 2015, 7:48 pm
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I've had trouble trying to help you for the usual scenario is
putting a chainsaw or weed whacker engine into a model air plane
and I keep giving responses in that direction.
You are wanting to put a Chinese reed valve model airplane
engine into a chainsaw.
Some good chainsaw candidates would be the so called "Clam
shell" chainsaws with a plastic case and a independent metal
engine. These are typically the smaller saws offered as home use
chainsaws. The are more often sold in discount stores and are
often at garage sales and junk piles as they are often
considered not economical to repair. These are usually 30 - 50
cc. Look at some of them and see what you think?
I see a big problem in pulling this off as chainsaws have double
ended cranks and most reed valve model RC engines have
cantilever cranks. The modern RC engines with more power have
battery powered ignitions and no flywheel. How will you cool the
engine? How will you start it?
#Post#: 62515--------------------------------------------------
Re: Unusual Porting
By: ch74 Date: September 30, 2015, 11:03 pm
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Low volt computer fan, for cooling when the engine is running it
comes on I have also thought about doing it to a modern chainsaw
engine. Trimming and balancing the flywheel and using a fan to
cool only when eng is running the fan comes on. That would b
some ponys in a chainsaw eng if just that was done. But as far
as rc eng in chainsaw it would be a project that's for sure, but
the ignition on rc put a batt pack somewhere and wire it to the
kill switch , turn switch to on it energizes the ignition. It
would b a runner.I think
Has anyone ever done the fan thing and removed all weight off it
and drag installed a low volt high volume fan run that off
ignition. If this sounds stupid let me know. Lol
#Post#: 62517--------------------------------------------------
Re: Unusual Porting
By: 660magnum Date: October 1, 2015, 12:03 am
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There's also the direction problem as the prop end of a RC
engine turns counterclockwise and the PTO end of a chainsaw
turns clockwise.
But that presents little problem for a battery ignition engine
as you just re-position the timing sensor. The reed valve engine
runs as well in one direction as the other.
#Post#: 62518--------------------------------------------------
Re: Unusual Porting
By: ch74 Date: October 1, 2015, 12:42 am
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You thinking about it? ;D I no it's off key, but what about
removing all fins and necessary weight from a chainsaw eng
flywheel? Installing a elec fan? Would the power gain b worth
it? It would b like installing elec fans on a car and underdrive
pulleys, getting rid of mechanical fan and stock pulleys. The
way im looking at it is, the fan fins on a flywheel and extra
wieght in the flywheel is a lot of drag git rid and lighten that
flywheel up I bet u could get a couple hp out of it. What do you
think, 660?
#Post#: 62521--------------------------------------------------
Re: Unusual Porting
By: 660magnum Date: October 1, 2015, 6:22 am
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For a cold start race saw making three cuts, no cooling is
needed.
#Post#: 62539--------------------------------------------------
Re: Unusual Porting
By: ch74 Date: October 1, 2015, 9:00 am
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I was thinking for a work saw.
#Post#: 62620--------------------------------------------------
Re: Unusual Porting
By: ch74 Date: October 1, 2015, 11:49 pm
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Also another thought. Has anyone ever put a R/c supercharger on
a saw. There small and compact??
#Post#: 62628--------------------------------------------------
Re: Unusual Porting
By: 660magnum Date: October 2, 2015, 6:28 am
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Have not seen any super chargers on chainsaws.
A tuned pipe changes them tremendously
#Post#: 62630--------------------------------------------------
Re: Unusual Porting
By: ch74 Date: October 2, 2015, 7:27 am
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yes sir. But the tuned pipe would be a pita to work around if
you wanted to use it out in the feild.
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