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slyck(at)frontiernet.net
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 Posted: Tue Sep 13, 2011 8:28 am Post subject: rain tolerant prop |
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Dennis, I once bought some "authentic" prop tape which turned out to too old to adhere to anything, so I bought some heavy packing tape which worked very well. I don't remember what brand it was so you
may have to buy more than one roll. Since it comes two inches wide you will have to cut it down the middle.
One inch seems to be a perfect width. Stick the center on the leading edge at the middle first, then press down the
curved edge (rear on a kolb:) and last, the flat side.
The tape on my warp is starting to look a little ratty near the tips now so I should think about redoing them next spring.
BB
On 13, Sep 2011, at 10:15 AM, Kirby, Dennis Civ USAF AFMC AFNWC/EN wrote:
| Quote: | << I'll get some Power Fin plastic tape and try it out as sacrificial material. Thom >>
Thom R - Where can you get Powerfin tape these days? I thought the company went out of business.
Dennis Kirby
Mark-3, 912ul
Sandia Park, NM
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captainron1(at)cox.net
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| Posted: Tue Sep 13, 2011 6:57 pm Post subject: rain tolerant prop |
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This is a little off the top, so hold on to your hats, but since I know that my Alum prop handles rain pretty well, in fact its not an issue that ever
came up, why not place an alum prop on the M3 sized Kolbs for the rainy day fliers. I have not looked into the weight penalty
and all of the rest of it, but .... ?
Has anyone tried it at all, a two blade Sensenitch as goes on a C-150, maybe?
Everybody relax just wondering out loud. Furiously digging a fox hole. 
Ron (at) KFHU
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Dana
Joined: 13 Dec 2007
Posts: 1047
Location: Connecticut, USA
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| Posted: Wed Sep 14, 2011 3:05 am Post subject: rain tolerant prop |
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At 10:54 PM 9/13/2011, Ron (at) KFHU wrote:
| Quote: | --> Kolb-List message posted by: "Ron (at) KFHU" <captainron1(at)cox.net>
This is a little off the top, so hold on to your hats, but since I know that my Alum prop handles rain pretty well, in fact its not an issue that ever
came up, why not place an alum prop on the M3 sized Kolbs for the rainy day fliers. I have not looked into the weight penalty... |
It sure would be heavier. You might be able to live with it from a W&B standpoint by taking it into account, but I doubt a Rotax gearbox could handle the increased moment of inertia. Even the direct drive auto engine conversions would likely have trouble with it.
-Dana
--
"Let's set the memory limit at 640K. Nobody will EVER need more RAM than that." - Bill Gates, 1981
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Wed Sep 14, 2011 3:05 am Post subject: rain tolerant prop |
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Ron,
Thinking out loud is a habit of experimenters and tinkerers. Sometimes you have to go thru a lot of "imperfect" ideas to get to the best ones.
That said, I doubt seriously that anyone makes an aluminum prop for a Jabiru or Rotax pusher. I do not know the hole pattern in an O-200 prop flange but suspect it is not identical to either a Rotax or Jabiru. I know the twist for a C-150 tractor is in the wrong direction for a pusher Rotax 912 or Jabiru. Jabiru specifies wood only except on one or two approved composite props they have tested.
Being a cheapskate, my current solution is to avoid rain whenever possible. When rain cannot be avoided I will slow down to about 65 mph and 2400 rpm keeping tip speeds below 520 mph, which appears to be the speed limit above which rain begins to erode my prop leading edge.
Thom in Buffalo
On Tue, Sep 13, 2011 at 10:54 PM, Ron (at) KFHU <captainron1(at)cox.net (captainron1(at)cox.net)> wrote:
[quote] --> Kolb-List message posted by: "Ron (at) KFHU" <captainron1(at)cox.net (captainron1(at)cox.net)>
This is a little off the top, so hold on to your hats, but since I know that my Alum prop handles rain pretty well, in fact its not an issue that ever
came up, why not place an alum prop on the M3 sized Kolbs for the rainy day fliers. I have not looked into the weight penalty
and all of the rest of it, but .... ?
Has anyone tried it at all, a two blade Sensenitch as goes on a C-150, maybe?
Everybody relax just wondering out loud. Furiously digging a fox hole.
Ron (at) KFHU
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Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
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