I only know of ONE Rebel that has flown for several years with
an EA-81 - it was completely stock, except for the re-drive.
It seems to me that the most one could reasonably <believe>
from the EA-81 would be about 95 - 100 hp. ....
Personally, I wouldn't bother with the EA-81 - it's very little
lighter than the EJ-22, which has a much better record of
successful use in aircraft. You wouldn't have to worry about
pushing the EJ-22 to stay in the air ..... :-)
Have flown several EJ-22 Rebels - I like them, as they are
smooth & quiet, and burn about 60 % of the fuel a comparable
Lycoming does in the same flight profile. Without any tweaking,
you'll get equivalent to about 135 + hp.
-- all this is just my experience. YMMD ;-)
Nice, and cheap (debateable...), as the Subarus are, realistically,
you will add 6 months to a year to your build-to-happy-flying time !
Usually figure 6 months for every major mod - and here, you are changing
mounts, cowling, positioning radiators.... etc. .... soooooooo..... :-(
I still say - spend a few dollars and get a Rotax 912, or 912S - a proven,
certified (if you want) aircraft engine that gives good performance and
outstanding fuel economy ! It just can't be beaten for the Rebel !!
Old aviation rule-of-thumb - - 100 lb. of airplane = 10 hp.
Given that the Rotax installed weight is less than half the weight
of the Subaru ..... = better performance and increased safety !
The safety comes in when you run into something - you have less
mass, so less kinetic energy to dissipate -- and the Rebel airframe
is great at absorbing and spreading energy, to protect the occupants !
--
......bobp
bobp@prosumers.ca
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com
-------------------------------orig.-------------------------
On Wednesday 30 January 2008 17:09, bransom@dcsol.com wrote:
Ken's article nudged me to check in again over at ramengines.com. Anyone
know of any experiences with their products? Looks and reads pretty good,
although easy to wonder if they're trying to squeeze too much out of an
EA-81. My own personal counter to that is that the Sube engines
themselves are extremely robust and the devil is just in the details.
-Ben
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