Rebel Cruise speed
Posted: Fri Feb 17, 2012 10:45 pm
Bruce as for part two of you message!!
I was out today on my 20" x 70" wheel skis and at 2450 I only get about 95
mph, with my 150 HP and WD prop. Mind you I <CAN> take off in less than 450
feet, out of 2' deep powder snow, with 26 gallons and myself aboard (or an
all up weight of about 1420lbs, including my two sets of snowshoes in the
back). I know categorically that a Super Cub can't do that on 10" wide
straight Federal skis (with plastic bottoms) as I had two of them in the
yard Monday afternoon. The 125HP SC used approx 1050 feet to get off and the
150HP used 800 feet when they left, and the150hp even cheated and used his
"back tracks" for half the take off run!!
Even on wheels in the summer I only see a maximum of about 100Knots wound up
at 2550/2600, but usually about 90Knots on the GPS on a calm day at
2450/2500. Sure I could pitch my prop a bit coarser, but I am in no hurry to
go anywhere (except maybe when a thunderstorm is chasing me!). Bob P's XWI
cruised pretty close to 104Knots with the power up at about 2550, if I
remember correctly, without any gear fairings and it's 150 HP x E2D and
Sensenich 74 x 56. Maybe Bob can give us the true number for XWI that he is
getting these days. Anyone that is getting much more than what you and I are
seeing must be running a really coarse propellor, or be like Steven that has
spent, many, many hours fairing everything right down to his filler necks.
I have wheel pants for mine and don't think they give me 10 MPH, maybe 5 at
the most but I have never really bothered to compare when they are on or
off. My gear legs are faired but I did make the cardinal sin of leaving the
rear tube round, unlike the way I fair them all now with a proper trailing
edge. SOME day when I find some spare time I am going to clean up the rear
drag brace tube and also add a trailing edge to my gear struts to make them
streamline and see how much I gain. The only thing that worries me about
taking out the drag is losing the ability to slide down the back side of
trees to land very very short. Make it tooo "slippy" and I won't be able to
land in the back field behind my mothers house anymore.
Cheers,
Wayne
----- Original Message -----
From: <Legeorgen@aol.com>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, January 28, 2003 11:55 PM
Subject: Re: Proseal
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I was out today on my 20" x 70" wheel skis and at 2450 I only get about 95
mph, with my 150 HP and WD prop. Mind you I <CAN> take off in less than 450
feet, out of 2' deep powder snow, with 26 gallons and myself aboard (or an
all up weight of about 1420lbs, including my two sets of snowshoes in the
back). I know categorically that a Super Cub can't do that on 10" wide
straight Federal skis (with plastic bottoms) as I had two of them in the
yard Monday afternoon. The 125HP SC used approx 1050 feet to get off and the
150HP used 800 feet when they left, and the150hp even cheated and used his
"back tracks" for half the take off run!!
Even on wheels in the summer I only see a maximum of about 100Knots wound up
at 2550/2600, but usually about 90Knots on the GPS on a calm day at
2450/2500. Sure I could pitch my prop a bit coarser, but I am in no hurry to
go anywhere (except maybe when a thunderstorm is chasing me!). Bob P's XWI
cruised pretty close to 104Knots with the power up at about 2550, if I
remember correctly, without any gear fairings and it's 150 HP x E2D and
Sensenich 74 x 56. Maybe Bob can give us the true number for XWI that he is
getting these days. Anyone that is getting much more than what you and I are
seeing must be running a really coarse propellor, or be like Steven that has
spent, many, many hours fairing everything right down to his filler necks.
I have wheel pants for mine and don't think they give me 10 MPH, maybe 5 at
the most but I have never really bothered to compare when they are on or
off. My gear legs are faired but I did make the cardinal sin of leaving the
rear tube round, unlike the way I fair them all now with a proper trailing
edge. SOME day when I find some spare time I am going to clean up the rear
drag brace tube and also add a trailing edge to my gear struts to make them
streamline and see how much I gain. The only thing that worries me about
taking out the drag is losing the ability to slide down the back side of
trees to land very very short. Make it tooo "slippy" and I won't be able to
land in the back field behind my mothers house anymore.
Cheers,
Wayne
----- Original Message -----
From: <Legeorgen@aol.com>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, January 28, 2003 11:55 PM
Subject: Re: Proseal
whiteWayne,
Just how yellow is the "old" Randolph slosh? The slosh in my tank was
thein color but I believe was added to the wing in 95, so I assumed it was
gasold stuff. I thought the newer auto grade Randolph was introduced in 96 or
97. After testing pieces of the slosh coated aluminum it in a jar of auto
speedsI felt confident enough to start mixing auto fuel with 100LL. just very
recently.
On another subject. I have heard several builders claim 120 MPH cruise
itat 75% (like MAM advertises) with the 0320 Lycoming and a 74x56 Sensenich
metal prop. My cruise at this power setting is 110 MPH. I have the spring
gear not faired, no wheel pants (don't want them) and a speed cowl. I find
wheelhard to believe, from my own experience, that I can pick up 10 MPH with
comments?pant spring gear faring and a few other possible drag reducers. Any
*-------------------------------------------------------------------------*Bruce 357R
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