[rebel-builders] Rebel - Engine choices
Posted: Sun Feb 19, 2012 11:38 am
Hi Brad !
My O-320 cruises about 116 - 118 mph at 2,450, with a 150 hp.
O-320, and a 74 x 56 Sensenich metal prop. That's the number I see
most often - summer, winter, loaded, or solo, - not as fast as some,
but realistic. Sometimes, when I'm loaded aft for Rambling, it goes
over 120 slightly ....
My old 80 hp. 912 Rebel cruised pretty consistently at 97 mph,
at 5,400 rpm - my idea of the best rpm for that engine.
GSC ground adjustable wood prop. Others see in the 90 - 95 mph
range with standard, 1,650 Rebels with the 80 hp 912 & Warp Drives.
I would expect that a 100 hp. 912-S Rebel would give about
110 mph cruise - especially if I use an in-flight variable pitch prop,
like the GSC mechanical one ( ~$1,500 !!).
You're right - the takeoff distance on wheels isn't much of a problem !
I've got video of the 80 hp 912 taking off in 129 ft. -- my O-320 Rebel
takes at least 300 ft. ... Bigger engined, heavier Rebels always have
longer takeoff rolls. So there's no problem no matter where you fly ! :-)
The old 80 hp 912 was no slouch on floats either ! It was better
than my old 85 hp. Aeronca Chief..... I have video of a 6 second
takeoff on Murphy 1500 straights - solo & very light !! Of course,
you might need a verrrry long lake on amphibs, at 1,700 lb !!! ;-)
(Not recommended ! )
--
......bobp
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
-------------------------------orig.-------------------------
On Monday 29 January 2007 22:58, Brad Hewlett wrote:
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My O-320 cruises about 116 - 118 mph at 2,450, with a 150 hp.
O-320, and a 74 x 56 Sensenich metal prop. That's the number I see
most often - summer, winter, loaded, or solo, - not as fast as some,
but realistic. Sometimes, when I'm loaded aft for Rambling, it goes
over 120 slightly ....
My old 80 hp. 912 Rebel cruised pretty consistently at 97 mph,
at 5,400 rpm - my idea of the best rpm for that engine.
GSC ground adjustable wood prop. Others see in the 90 - 95 mph
range with standard, 1,650 Rebels with the 80 hp 912 & Warp Drives.
I would expect that a 100 hp. 912-S Rebel would give about
110 mph cruise - especially if I use an in-flight variable pitch prop,
like the GSC mechanical one ( ~$1,500 !!).
You're right - the takeoff distance on wheels isn't much of a problem !
I've got video of the 80 hp 912 taking off in 129 ft. -- my O-320 Rebel
takes at least 300 ft. ... Bigger engined, heavier Rebels always have
longer takeoff rolls. So there's no problem no matter where you fly ! :-)
The old 80 hp 912 was no slouch on floats either ! It was better
than my old 85 hp. Aeronca Chief..... I have video of a 6 second
takeoff on Murphy 1500 straights - solo & very light !! Of course,
you might need a verrrry long lake on amphibs, at 1,700 lb !!! ;-)
(Not recommended ! )
--
......bobp
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
-------------------------------orig.-------------------------
On Monday 29 January 2007 22:58, Brad Hewlett wrote:
Bob,
Engine choices seem to be on peoples mind these days, including mine.
What do think the difference in cruise speed would be between the 912 S and
the
O-320? If a person is not going to go to floats I'm thinking that the
difference in
take-off distance on wheels shouldn't cause that much of a problem.
Brad.
Brad Hewlett
Saskatoon, SK
bhewlett@sasktel.net
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