On Thu, 24 Feb 2005 21:47:27 +0100, Artur Rutkowski
wrote:

Thanks for all info!!! It's very useful as I have no experience with
tow-planes other than Wilga,Yak 12 or Zlin :-)

Could anybody provide more specific figures about performance of Rallye
235C version - especially climb rate and take-off run with heavy glider,
and fuel consumption during tow operations (I heard something about
75l/h !!!)

Artur


A properly adjusted MS235E should use around 55l/h fuel on average for
towing. If you get to 60l/h you have a carburettor mixture problem...I
got this number quite consistently over the years. I suppose the 235C
might do a tad better because of the lower drag classical gear, and
its interior is lighter than the 235E interior (2 seats only, simpler
avionics...).
I do not know precisely the performance numbers for towing, but I
would say 3,5 m/s for an ASH 25, and 5 m/s for standard gliders are
close to the truth. The take-off run is about 250 m with an ASH 25, 15
m high run around 400 m on a field 300 m high.
I have often towed ASH and Nimbus 3/4D out of a 650 m long field at
1300 m (Sollières if Robert knows :-)) )altitude without undue worry,
and without wind...

Amically,

JVM