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BEBERRY(at)aol.com
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 Posted: Fri Jul 14, 2006 12:19 am Post subject: > Re: Maximum Range flights. |
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Paul,
I cannot quote exact fuigures for the Europa but as an example (which is not perfect as jet powered aircraft work to different parameters), I used to fly in Sea Vixens and the best speed for maximum endurance i.e. for the maximum time in the air regardless of the distance travelled, would be about 180 knots.
On the contrary, if you were going for the best range i.e. maximum distance flown for a given fuel load, then you would beetle along at about 330 knots. There is, as you will note, a big difference. The best range speed would not vary with differing winds. The difference is not so large with a piston engine, and you will not be concerned with max endurance - a case which would only arise, usually, in the military field where you may have to stay on CAP station for max time , for instance, waiting to intercept an incoming raid.
One of the peculiarities of GA is that, unlike military flying, there are few, if any, tables to give best range and endurance speeds for differing heights, air temperatures etc. I know of no source for these but maybe the internet holds the answers somewhere!
It would be interesting to work out some figures for oneself but this would entail a great deal of air time and expense - a job which used to be done for us by test pilots who would then issue a complete set of pilot's notes with all the info.
Good job for you if you have the time and inclination!!
Best wishes.
Patrick
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milneab(at)onetel.com
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| Posted: Sat Jul 15, 2006 2:37 am Post subject: > Re: Maximum Range flights. |
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There was a chap at the Europa Seminar in Camberley this year who I think has
the performance figures you seek for the Europa aerodynamics. He might
also be
the man to theorise on this subject.
To cut a long story short we met airside he expressing interest in the
Europa as
he had completed a dissertation on comparing wind tunnel tests on the Europa
wing against the Don Dykins design figures. I gave him a caby and put him in
touch with the Europa Club and hence the seminar appearance. He had a copy of
the dissertation complete with polar curves etc. in it. Then all you need is
the equivalent thrust / fuel figures!!!
He has completed his degree from Hatfield and was last heard of
training towards
a CPL at Blackbushe in April last. The name has escaped me but Don Dykins or
Dave Bossomworth might help.
Yours Alasdair Milne
Quoting BEBERRY(at)aol.com:
| Quote: | Paul,
I cannot quote exact fuigures for the Europa but as an example (which is
not perfect as jet powered aircraft work to different parameters), I used to
fly in Sea Vixens and the best speed for maximum endurance i.e. for
the maximum
time in the air regardless of the distance travelled, would be about 180
knots.
On the contrary, if you were going for the best range i.e. maximum distance
flown for a given fuel load, then you would beetle along at about 330 knots.
There is, as you will note, a big difference. The best range speed would
not vary with differing winds. The difference is not so large with a piston
engine, and you will not be concerned with max endurance - a case
which would
only arise, usually, in the military field where you may have to stay on CAP
station for max time , for instance, waiting to intercept an incoming raid.
One of the peculiarities of GA is that, unlike military flying, there are
few, if any, tables to give best range and endurance speeds for differing
heights, air temperatures etc. I know of no source for these but maybe the
internet holds the answers somewhere!
It would be interesting to work out some figures for oneself but this would
entail a great deal of air time and expense - a job which used to be done for
us by test pilots who would then issue a complete set of pilot's notes with
all the info.
Good job for you if you have the time and inclination!!
Best wishes.
Patrick
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