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#31
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Prop angle of attack vs age
"Maxwell" luv2^fly99@cox.^net wrote in news:UV6ek.20349$%q.12918
@newsfe24.lga: "Bertie the Bunyip" wrote in message ... Snort! I'm so far ahead of you i know what you had for lunch next thursday. It will be Spaghetti-ohs, BTW Bertie You're a legend in your own mind. Yep. Bertie |
#32
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Prop angle of attack vs age
"Bertie the Bunyip" wrote in message ... You don't need those drugs, Maxie, you just need a bit of electro shock. Try sticking your tongue in a light socket. You'll not only enjoy it, you'll notice the difference n your outlook in a matter of days, if not hours. Bertie Sounds like the voice of experience to me. Now we know the rest of the story. Good day! |
#33
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Prop angle of attack vs age
"Bertie the Bunyip" wrote in message ... Snort! I'm so far ahead of you i know what you had for lunch next thursday. It will be Spaghetti-ohs, BTW Bertie You're a legend in your own mind. |
#34
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Prop angle of attack vs age
"Maxwell" luv2^fly99@cox.^net wrote in news:SZ6ek.20352$%q.4000
@newsfe24.lga: "Bertie the Bunyip" wrote in message .. . Can't argue with a liar. Translation. Won't argue because you can't. Evasion noted. Bertie Where you get this one, MX? Evasion noted. Bertie |
#35
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Prop angle of attack vs age
"Bertie the Bunyip" wrote in message .. . Can't argue with a liar. Translation. Won't argue because you can't. Evasion noted. Bertie Where you get this one, MX? |
#36
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IKYABWAI..
on 7/12/2008 1:39 PM Bertie the Bunyip said the following:
"Maxwell" luv2^fly99@cox.^net wrote in : "Bertie the Bunyip" wrote in message ... You don't need those drugs, Maxie, you just need a bit of electro shock. Try sticking your tongue in a light socket. You'll not only enjoy it, you'll notice the difference n your outlook in a matter of days, if not hours. Bertie Sounds like the voice of experience to me. Now we know the rest of the story. Good day! Awww, IKYABWAI lames. You adorable! You have quite the chewtoy there, Bertie! I think you can set the drag on high with this one and he won't throw the hook. |
#37
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Prop angle of attack vs age
on 7/12/2008 1:22 PM Bertie the Bunyip said the following:
"Maxwell" luv2^fly99@cox.^net wrote in news:dt4ek.20332$%q.3231 @newsfe24.lga: "More_Flaps" wrote in message ... I'd say unlikely. Cheers Or hallucination. Your an hullucination? I thought you were more sort of a bad dream. the kind you have whne you eat too many chilli dogs. He's more like what you find in the bowl the next morning after all those chili dogs... |
#38
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Prop angle of attack vs age
On Jul 13, 6:25*am, Bertie the Bunyip wrote:
More_Flaps wrote : On Jul 13, 12:53*am, wrote: On Jul 12, 8:37*am, Stealth Pilot wrote: On Fri, 11 Jul 2008 06:00:22 -0700 (PDT), wrote: On Jul 11, 7:09*am, Stealth Pilot wrote: On Fri, 11 Jul 2008 08:57:13 +0000 (UTC), Bertie the Bunyip T...@ld .you wrote: sid wrote in news:702f8b8d-b77e-452c-904c- : On older planes, does the angle of attack change ? Does the prop angle relax like a motorboat prop does after 1 or 2 decades of constant use ? (fixed pitch of course) There are some older warriors on the field (20 - 25) years, and i t seems that there props don't have the bite that the new warrior ( 10 years old) does. No, but years of wear and dressing the prop because of nicks and wh at not doesn't do them any good at all. Bertie I have a fibreglass covered wooden prop which makes it reasonably resilient in light rain. I paint it. when the aforesaid light rain has eroded the paint *near the leadi ng edge I lose 5 knots in cruise speed. also If I alter the shape with a poor paint coat I lose cruise speed . the other factor with some commercial aircraft is that there are oft en 3 props approved for them. a climb, a utility and a cruise prop. on little cessnas they are each 2 inches of pitch apart. memories of cruise with a cruise prop would make cruise on a climb prop seem quite anaemic. ....and what bertie wrote. Stealth Pilot I can understand why a poor -- as in not smooth -- paint job would alter the prop's efficiency, but never would have guessed having a fractional mm of paint ablated from the leading edge of the prop would affect it that much. Tongue in cheek question -- did the natural color of the prop clash with that color and scare the air, or something? On a serious note, have you any thoughts as to why such a minor change in shape would have such a remarkable change in efficiency? A 5 knot change in airspeed is like reducing the manifold an inch or so, isn't it? That's huge! It also suggests there may be very minor changes in prop that could improve performance too. l the prop had a fairly average sheath put on it. average workmanship. I use the paint layers to fair the surface to a smoother shape. the face I see is painted matte black to make it invisible. the leading edge is blue, the rest varnish. chipped paint just creates a turbulator which seems to affect this blade section. (clark Y, aka naca 44xx series) I got 5 extra knots in cruise for nothing when I cleaned up the prop and got the shape right the first time. the damaged leading edge paint just drops me back to the original slower cruise. Stealth Pilot Five knots is a huge gain. I remember reading some years ago of a homebuilt getting a new paint job, and the color change on the wings led to a paint 'bump' or seam near the leading edge which so altered the airflow the airplane could not fly (probably changed the stagnation line). Sounds like a myth to me. How thick is a paint line? Still, that big a change in cruise speed seems remarkable. I'd say unlikely. Not in an airplane like the Tailwind. A small change in somethign like a Cherokee might not get you much, though a series of changes will get you quite a lot evn in one of those, but something that acts more of a whole like a talwind or a Midget mustang can be hugely affected by one single ingredient being out. Sure but becoming unflyable due to a paintline? Cheers |
#39
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Prop angle of attack vs age
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#40
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Prop angle of attack vs age
Rich Ahrens wrote in
. net: on 7/12/2008 1:22 PM Bertie the Bunyip said the following: "Maxwell" luv2^fly99@cox.^net wrote in news:dt4ek.20332$%q.3231 @newsfe24.lga: "More_Flaps" wrote in message ... I'd say unlikely. Cheers Or hallucination. Your an hullucination? I thought you were more sort of a bad dream. the kind you have whne you eat too many chilli dogs. He's more like what you find in the bowl the next morning after all those chili dogs... Unfortunately, that's no hallucination. Bertie |
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