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Richard,
That's all good information, as I regularly try to convince people to consider the single as
an alternative engine for aviation requirements of 80hp to 125hp - so 170
lbs is quite light indeed!
The only info I have had to date on weights is the
stock housings and a PSRU of a similar design to Tracy's which is why I quoted
the 240 lbs.
I will have to sit down (one day) and weight
everything to show how these weights are derived, for those who might be interested in a single in the not to distant
future, so keep up the good work there may be more people interested than you
might imagine.
George ( down under)
George,
FireWallForward means everything ready to fly,
but dry.
Hope this helps.
My redrive is a Hirth G40 which is rated for up
to 140HP. Gear ratio for my AVID is 3:1. This gear box is available with a
clutch if needed.
----- Original Message -----
Sent: Saturday, May 19, 2007 4:16
PM
Subject: [FlyRotary] Re: Single Rotor
update
Thanks Richard,
What is the 170lb made up of, are you including
PSRU, radiator and fluids?
I was estimating an all up weight of 240lb with
Tracy's PSRU (45lb) - if I remember correctly your using something lighter (
Rotax?).
George ( down under)
George,
the original side housing on the flywheel end
is 30lb including stationary gear, my compound housing is 15.5lb.
Keep in mind that is has been adjusted to single Rotor requirements, like
smaller water passage and a few other things.
On the water pump side, the difference is
going to be somewhat less, because of the stationary gear.
Over all, a FF weight of 170lb is still the
goal, and possible.
Richard Sohn
N2071U
----- Original Message -----
Sent: Friday, May 18, 2007 10:01
PM
Subject: [FlyRotary] Re: Single
Rotor update
Today, I did an engine tear down after
the first hr accumulated running with the new compound side
housing.
The runs were about 7 to 8 min each.
This is the time it takes the engine on the test stand to heat up to
max temperature, which was over 200F on water and
oil.
There was never a leak of water or oil
during the tests.
As the inspection indicated,
the O-Ring seal around the bearing area was as it was when
installed. The clamping of the cast iron insert did not show any
movements.
It looks like the compound side housing
with the floating insert periphery is going to work.
Next is fixing the test stand for running
the engine with gear box and propeller for max power testing. At the
same time, I will incorporate ancilliary items, such as ignition,
exhaust, fuel system, cooling and motor mount.
Richard Sohn
N2071U
Richard,
Very good outcome - will you give the
weight difference between the cast iron and the composite
housing.
George (down under)
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