On Sep 1, 7:49 am, "Zebulon" @###@.^net wrote:
"Bertie the Bunyip" wrote in 8.18...


They don't have much in the way of carb heat. Icing is very common problem
with a Gypsy.

Bertie

Isn't Google nice, shame you never post the link.

Now come back and lie about it. Tell us how you already knew and never have
to use Google.

Be hard to find that on Google, I think. I owned an Auster
with Gipsy, and it quit on me when it iced up. The Auster's setup had
automatic carb heat, and I suspect the Tiger Moth uses the same thing.
The heat comes on as the power is reduced through about half throttle,
since it's linked to the throttle instead of being separate, and so if
the dewpoint is high enough carb ice is likely. Further, the heat is
marginal; it's taken from up against the side of the crankcase, which
may or may not be very warm. It doesn't come off the exhaust like most
NA aircraft. Ice at full throttle is therefore very possible.
http://www.johnjohn.co.uk/compare-ti...ipsy_major.jpg
You can see that big round thing in the middle of the picture? The
carb heat pickup, and linkages are visible around the heat valve,
connected to the throttle on the carb below the valve.

Dan