<9F7CCD5AA88D1B46A911658D80F960B8017467@zserver2.Zutrasoft1.zutrasoft.com>
My experience with the overheating problem is that the 914 will not overheat
in cruise or climb if you stay faster than 120MPH. At slower climb speeds
it will blow coolant out of the bottle and overheat if you continue for more
than about a minute. That allows you to take off and get to pattern
altitude the level off and get some speed. It will overheat if the outside
temp is 30 degrees and you try climbing at 90-100 MPH for any sustained
length of time. On the ground the engine will overheat in summer 70 degree
temp if you sit more than about 5-10 minutes. I am using a 50% mixture.
That's my experience after 88 hours. I am considering a cowl flap.
I see the AirForce has a 914 powered drone. How big is their radiator?
Ken Carpenter
A123 N9XS
----- Original Message -----
From: "Peter Zutrauen" <peterz@zutrasoft.com>
Subject: Re: 2 items - service bulletins on Rotax and
> Just wondering..... what kind of _coolant_ temps are folks seeing;
> @cruise?
> @climb?
> @taxiing?
>
> Is anyone out there measuring it?
>
> I am asking the question with full understanding that it depends upon
outside air temp (and speed/power setting) since there is no thermostat in
the rotax plumbing. I would assume that the highest temps would be during a
prolonged taxi. In that case, are folks blowing coolant out the bottle vent
when/if it gets to over-pressure?
>
> Cheers & thanks,
> Pete
> A239 Dual-wing
>
>
> >PFA now require coolant temp to be measured rather than CHT. Very
> >sensible,IMHO but please note the boiling point, 115deg C or 130deg at 1
> >bar overpressure, (the relief valve is set at 1 bar)
>
> >Graham
>
>
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