in the plane little breeze 5mph
but i think it was a 82 x 44 cruise was barely 95 at 2450 instead of 105
mph
speaking of top speed i get about 120-122 @2725 i think you may be a
little over proped drew
fish
----- Original Message -----
From: "Walter Klatt" <Walter.Klatt@shaw.ca>
To: <rebel-builders@dcsol.com>
Sent: Sunday, August 26, 2007 9:07 AM
Subject: RE: [rebel-builders] Props
Were you flying off the water with it and if so how many seconds?
Walter
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Bob
Fisher
Sent: Saturday, August 25, 2007 8:57 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Props
hi walter i tried a borer prop about 2 years ago climbed a little
better
not signifigantly! but it was soooooo slow in cruise compared to the
sensenich that i took it off the next day
bob fisher rebel 342
----- Original Message -----
From: "Walter Klatt" <Walter.Klatt@shaw.ca>
To: <rebel-builders@dcsol.com>
Sent: Tuesday, August 21, 2007 11:48 PM
Subject: RE: [rebel-builders] Props
Sure would like to see someone try a Borer. I had a chance a couple years
ago, when someone offered to lend me one. But with my cowl and need for a
spacer, it wouldn't fit. I realize the cruise speed would be less, but am
really curious to see how fast it can come off the water, and what the
climb
rate would be.
My prediction for 150 hp is less than 10 seconds (in near no wind
conditions) and 1500 fpm. If not, then it is not worth it.
The only way I get less than 10 seconds with mine, is with a good head
wind.
Top climb for me solo, is 1100 fpm. That is with the Sensenich 74 X 54
and
150 hp.
Walter
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Angus
McKenzie
Sent: Saturday, August 18, 2007 9:29 AM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] Props
Hi everybody, summer greetings!
I've been running a McCauley 74X56 (now re-pitched 54") that was on my
0-320-A2B on the Champion GCBC it came from.
Built the engine up to 160+hp; the prop worked great at 56" on wheels and
then I went on MAM amphibs, after trying a friends' 74X52 I had the 56"
re-pitched to 54". Works quite well.
Off the water in fairly quick times at gross+ and cruises at 80kts IAS at
2400rpm.
Max static rpm is 2400 and max level flight rpm is 2550.
Not getting to the 2700rpm where all the horsepower lives. Possibly a bit
over-propped.
So, to complicate the equation I bought an 80X40 Borer (McCauley) off a
150hp Champion GCBC.
I intend to install this prop as-is and verify performance but I'm
expecting
to need to re-pitch to about 43". Oh', as well, there was a 2" McCauley
spacer came with the prop if anybody needs one let me know.
Has anyone else tried a Borer? Results? Numbers? Advice? I know that
"rule-of-thumb" is: 1" of pitch = 100rpm
As an aside to this I heard today from Carm Titus that his cousin Mike
Titus
(longtime Leavens employee who has helped many of us Rebel types with our
engines) was working on a plane at Brampton in recent weeks and
momentarily
distracted by a bystander got hit in the head by a prop blade. Carm said
Mike is going to lose one eye. You can't be too careful.
Thanks and best regards to everyone, Angus
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