The Bucket Foundry

[Grumph]

Surely if it can't be rotated around and still have the travel, it could be moved outbound enough?

If you've got room in the frame I'd have thought it could be moved outboard.

[Flettner]

Breezy you asked about the pull start?
Seen here, screws into the left hand thread used to screw the flywheel puller into. The rest of the mechanism is from Robin.

[breezy]

Breezy you asked about the pull start?
Seen here, screws into the left hand thread used to screw the flywheel puller into. The rest of the mechanism is from Robin.

thanks, now i can see how you’ve managed to attach this

[Flettner]

The gyro engine ready to run with new power valve cylinders, R6 servo to operate these blade valves. Ignitech runs the R6 servo, same as the one under the Kawasaki seat that runs the variable rotary valve via push pull cables.

[F5 Dave]

That so needs to go into an RG50 frame.

[Flettner]

A step closer

[WilDun]

Who is going be the test pilot? - you?

[Flettner]

Well Yes, this time. I've been building gyros for years and never flown them on my own. But I've been taking lessons recently. I'm ready to go, so will the gyro be ready by next weekend. Probably the guy training me will fly it first but then my turn. It will be just up and down the strip stuff for a start, too bad if the engine stops, pretty sure I can land it, probably do some more engine out training on the two seater first.
This gyro has flown before but with an earlier version of this engine.

[Niels Abildgaard]

What is state of art today for prop diameter,RPM and horsepower?
And what RPM ,cyl volume and mass for engine?

[Flettner]

Don't know about 'state of play' but this engine is 80 /90 HP , weighs 42KG, reduction ??? cant remember, approx 2.6 to one, 66" prop (limited by mast height, rotor clearance). electric start, balance shaft equipped (doubles as a pre rotator drive) and is pre equipped for TPI injection. Gear reduction is internal not a bolt on extra.

[Niels Abildgaard]

Don't know about 'state of play' but this engine is 80 /90 HP , weighs 40KG, reduction ??? cant remember, approx 2.6 to one, 66" prop (limited by mast height, rotor clearance). electric start, balance shaft equipped (doubles as a pre rotator drive) and is pre equipped for TPI injection. Gear reduction is internal not a bolt on extra.

Thank You and good luck
Small aircraft engines is the best bet for two stroke survival.
What cylinder dimenson and how many revs max?

[Flettner]

70 x 80 bore, approx 7000 / 7500 rpm, depending on prop pitch.

[WilDun]

Do carburetted two strokes deal well with the atmospheric pressure changes (at different altitudes) without problems?

Do they need to be jetted to run rich on the ground?

[Flettner]

Ha ha, I won't be off the ground far enough for that to be a problem. The slide carbs seem very tolerant to air pressure changes.

[Frits Overmars]

Do carburetted two strokes deal well with the atmospheric pressure changes (at different altitudes) without problems? Do they need to be jetted to run rich on the ground?

What made you say that, WilDun? Rich on the ground will only mean even richer at altitude, where the air is thinner and the atmospheric pressure is lower.
Rich on the ground was used in piston-engined fighter planes that used lots of blower boost for take-off and needed to cool the engine internals with fuel in order to keep them alive.