Thanks Dion,
I'm downloading it now.
Allan Hudson showed me in and out of cockpit video earlier this month
when we flew in to Waikerie and stayed with him and Marie overnight.
I had a good look at the installation then. Apparently the ignition
difficulties were caused by a really bad batch of LPG(approximately
50/50 propane butane mix when it is good. Not certain what was in
what he got). He's located a source of pure propane since and things
are much better.
I got to start an AMT Olympus in late 2006 in a test cell and it lit
off right away just with the glowplug. In Perth last August we tested
the spark ignition on butane and had absolutely no problems. That was
with my prototype spark unit which fired about 4 times a second and
an unmodified spark plug. I've since modified the spark unit to fire
60 times a second and the spark jumps from the centre electrode to
the plug body so we have a nice 3 mm arc. Testing as soon as I have
the engine mounts fabricated.
At full throttle Allan has about 70Kg thrust available. This is just
a little less than a TOP (76Kg) static thrust but the difference is
that the jet thrust only decreases slowly with increasing airspeed
where the TOP is down to 44KG at 50 knots. Hence the slower initial
ground roll.
Mike
Borgelt Instruments - manufacturers of quality soaring instruments since 1978
phone Int'l + 61 746 355784
fax Int'l + 61 746 358796
cellphone Int'l + 61 428 355784
email: [email protected]
website: www.borgeltinstruments.com
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