Congratulations to all for achieving this, incident free.
It's heartening to know that several Europa's can make such a long
trip together, safely and economically.
I have some figures of my own from recent expeditions. I think a clear
lesson to be learned from analysis of the published figures is that a
reduced power settings brings increased economy. An overall target of
105 knots ground speed, seems to yield a figure just under 14 litres/hr.
Reducing that by 10 knots seems to result in a value closer to 11 litres/hr
and adds roughly 4 mpg to efficiency (>10%).
N.B. My own figures probably appear surprisingly good due to very favourable
flying conditions on the days in question (ie. Wind strength aloft has a
very
significant effect on overall performance)
BWFX (Europa 'Classic' 912, unmodified):
Recent cross country performance:
* Time figures are overhead-overhead field
Rayne (Essex) - Polperro (Cornwall) 9th April 2000
Outbound: 1hr 50 min wind neg.
Return: 1hr 50 min wind neg.
Distance: 250 statute each way (estimate includes 2% error)
Av Spd: 136 1/2 mph (118 kts)
Still air mpg: 37 mpg
Fuel use: 16 litres/hr
RPM: circa 5000 - 5200 (Flydat)
Rayne (Essex) - Blair Atholl (Highlands, Scotland) 12th - 14th May 2000
Outbound: 2hrs 39 min
Return: 3hrs 01 min
Distance: approx 395 statute miles each way (routing includes
additional 4% for error)
Av Spd up: 152 mph (132 kts) tailwind assisted (10-15 mph??)
RPM up: 5200 -5300
Fuel use up: 49 litres (c 18 litres/hr)
Av Spd down: 131 mph (114 kts) slight headwind (5 mph??)
RPM down: 5000 -5200
Fuel use down: 49 litres (c 16 litres/hr)
Av. MPG figure: 36 1/2 mpg
NB. Tank capacity in main is circa 70 litres useable (larger than average)
----- Original Message -----
From: <DaveBuzz@aol.com>
Subject: RE: Prague trip
> got to agree Mike, many thanks to Dave, Peter and Tom for a super
experience.
> especially liked the way they threw in the odd 'character building'
challenge, such as the arrival and departure at Spa on the monday...
> FWIW, totals for g-bxum for the trip popham-benesov-popham:
> brakes off/brakes on 12:00
> 5:20 flying time out, 635nm
> 6:40 flying time back, 631nm
> 173L fuel, at 105kt ias, 115 tas (i like to fly high!),
> 13.3L/hour for a 912/warp drive/classic.
>
> chus,
> dave
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