Paul, what make is the rotary in the gyroPlane ?
Thanks, Steve Carlisle
for all you guys building your own PSRU here is a company selling drive train parts.
http://www.drivetrain.com/parts_catalog/axle_shafts/axle_shafts_cars_and_pickup_trucks.html#FORDTRUCK
Paul Lamar
Hi Paul.
Do you think motorcycle drive chain can take 6000rpm?
What is your opinion simple to make chain drive PRSU?
I appreciate your help.
Luke F WINGS.
It might work. I think a late model Harley cog belt would work better.
Chain and belt drives take up more room in the cowl not leaving enough
for the cooling system. You also need an extra bearing on the outside
of the small e-shaft pulley.
Paul
Paul, what make is the rotary in the gyroPlane ?
Thanks, Steve Carlisle
It was a Rotomax charged cooled unfortunately.
Charge cooled rotaries are not going to fly for long on over about 70% power.
Also something failed in the rubber coupling, the gear box or the drive shaft
and the test Vampire aircraft crashed. The rubber coupling shown had a
5000 RPM rev limit.
The company then went bankrupt.
http://lightsportaircraftpilot.com/sadler_vampire_ultralightaircraft/index.html
I spent a lot of unpaid time trying to fix the many problems but I was
pretty much ignored.
They had a well equipped factory but it turns out all the machine tools
were borrowed or leased. The debtors got little.
Paul Lamar
We tried a motorcycle chain drive for a prop reduction on the
Aixro as we had the clutch and everything off the karting engine anyway.
I was never really aware how much noise and vibration the chain makes
until that day. Later a customer tried the same thing. We told them
it's pointless, but they tried anyway - and ended up with the same result.
As Paul says, a (Harley) cog belt - with a torsional damper - would
be a better choice if you want to go down that route.
Just to comment on charge cooling: Charge cooled engines are good
if know what you do and set them up to run them within their limits.
They will not be as powerful as air/oil cooled rotor engines, but in
return they are smaller and lighter. So really it depends on what
you need and what you do with the engine, and the problem with
Rotamax was surely not charge cooling as such, but things like
understanding the limitations, getting everything right - and
not listening to Paul's advice ;-)
Poul Woelfle
ph.woelfle@woelfle-engineering.com
Very funny Poul :) Oil cooled rotor, rotary engines have no stinking "limitations" :)
Jim Mederer at Racing Beat is getting 650 HP for a minute and a half
out of the Mazda 13B.
Quote from the AIXRO manual :) I think you wrote this Poul :)
-------------------------------------------------------------------
1.2. General Safety Instructions
The XR50 is made exclusively for kart racing. Using the engine in other applications is
strictly prohibited without our express written consent. Race the XR50 on designated
karting tracks only, so you never run the engine at full throttle for more than 10 con-
secutive seconds.
------------------------------------------------------------
End quote.
Rotomax, Austro Engines and Norton had classic problems with the needle
bearings mandatory in charge cooled rotors. OK for road racing as
you never spend more than a few seconds at max power. At first Rotomax claimed
well over a 100 HP and that steadily came down over time.
This pdf describes the problem and soutions in a nutshell.
http://www.rotaryeng.net/Wankel-CC-paper.pdf
BTW Poul, I will be in Germany the first week in January and
will bring the ignition stuff with me. I know I am crazy to
go to Germany in the winter time but I will be in New York for
Christmas so I am half way there :)
Paul Lamar
The Rotary Engine News Letter. Powered by Linux.
ACRE NL web site.
http://www.rotaryeng.net
You Tube
http://tinyurl.com/beqqxas
Copyright 1998-2014 All world wide rights reserved.
