Today's Message Index:
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1. 07:10 AM - Old Firestar (Dennis Thate)
2. 08:03 AM - Re: Old Firestar (Ralph B)
3. 10:49 AM - free air (chris davis)
4. 04:45 PM - Re: free air (wakataka)
Message 1
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Found this old Firestar stashed in the back of a hangar. I'm just curious about
the landing gear wheels !?
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Both optimists and pessimists contribute to our society. The optimist invents
the airplane and the pessimist the parachute. ~Gil Stern
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Message 2
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| Subject: | Re: Old Firestar |
They are lower profile wheelbarrow tires. All Kolb Firestars came with wheelbarrow
tires. The ones in the picture would be less drag and give a slightly faster
cruise.
Ralph B
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Ralph B
Original Firestar 447
N91493 E-AB
1000+ hours
26 years flying it
Kolbra 912ULS
N20386
200 hours
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Hi Kolbers , Just a question , has anyone ever tried a free air 377 on a Ko
lb ? or a 477 -or 503 free air ? I have a chance to buy on I am also wond
ering if the fan cooling shrouds and fan off a-Ski Doo-will fit an airc
raft 377 or are they the same engine ? Thanks Chrfis=0A-=0AChris Davis=0A
KXP 503 492 hrs=0AGlider Pilot=0ADisabled from crash building Firefly
Message 4
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Chris -
I have a fan cooled 377 from a 1992 Ski-Do and it has shrouds very similar to my
UL-377 except they are made of steel rather than aluminum. Also, there is hole
about 1.5" in diameter where a tube was connected to the shroud to deliver
fresh cooling into the muffler on the sled. It would be relatively easy to rivet
some sheet metal over this hole and then you could use the shroud on the UL
engine. The fan and all the mounting holes in the castings are the same. The
Ski-Do engine has the same internals, cylinders, and block as my UL engine but
the PTO end of the block is not machined to accept a gearbox. It has the provision
8 bolt holes, which aren't tapped. I've read that this case can be machined
to fit a gearbox, but of course it is verboten by Rotax.
I'd be a little skeptical about running free air but you might get away with it.
I see CHT of 350 degrees on climb out with fan cooled 377. I think you'd be
pushing red line with free air. The other drawback to free air is that it cools
down more during descent, so you have more risk of cold seizure. With fan cooling,
the engine stays warmer on a rapid descent at idle, such as when doing
touch and go practice. If you are careful about the way you fly it, you might
be able to get away with it. The 377 has a reputation of running cooler than the
other engines.
Martin B.
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There is something fascinating about science. One gets such wholesale returns of
conjecture out of such a trifling investment of fact.
Mark Twain
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