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rowedenny
Joined: 09 Mar 2008
Posts: 338
Location: Western PA
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 Posted: Mon Jun 15, 2009 3:33 am Post subject: Spare Prop blade? |
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Kolbers,
Last night while backing the Mk-3 into the hanger with my tractor, I forgot to rotate the prop so that one blade was pointed down, was so occupied watching the wing tips clearing the doors that the sound of the straight up prop blade breaking on the door frame caught me completely by surprise.  A John Deere 950 in low range does not give you any feedback that you are hung up on something.
Anyway, I'll be ordering a new prop blade from Powerfin later today along with a trailer dolly from harber freight to use to pull the bird and TEE trailer in and out of the hanger by hand. Funny how the $20 trailer dolly seemed expensive until the $200 prop blade was sacrificed.
Dang
Dennis Rowe
Mk-3, 690L-70, Powerfin F
PS: If anyone has a spare blade from a Powerfin F model pusher 2 stroke set up, call me quick to make a deal.
724 882 6788
[quote][b]
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Mon Jun 15, 2009 4:23 am Post subject: Spare Prop blade? |
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Sorry to hear of your prop problem.
I've been running prop blades into the edge of the sheet metal roof on my hangers since I first pushed the Firestar in its new home. However, never broke one, probably because I push mine in by hand.
Would it be possible to see a photo of the damaged prop blade?
john h
mkIII
[quote] Last night while backing the Mk-3 into the hanger with my tractor, I forgot to rotate the prop so that one blade was pointed down, was so occupied watching the wing tips clearing the doors that the sound of the straight up prop blade breaking on the door frame caught me completely by surprise.
Dennis Rowe
[b]
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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h20maule(at)hotmail.com
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lucien
Joined: 03 Jun 2007
Posts: 721
Location: santa fe, NM
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| Posted: Mon Jun 15, 2009 8:53 am Post subject: Re: Spare Prop blade? |
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[quote="rowedenny"]Kolbers,
Last night while backing the Mk-3 into the hanger with my tractor, I forgot to rotate the prop so that one blade was pointed down, was so occupied watching the wing tips clearing the doors that the sound of the straight up prop blade breaking on the door frame caught me completely by surprise. A John Deere 950 in low range does not give you any feedback that you are hung up on something.
Anyway, I'll be ordering a new prop blade from Powerfin later today along with a trailer dolly from harber freight to use to pull the bird and TEE trailer in and out of the hanger by hand. Funny how the $20 trailer dolly seemed expensive until the $200 prop blade was sacrificed.
Dang
Dennis Rowe
Mk-3, 690L-70, Powerfin F
PS: If anyone has a spare blade from a Powerfin F model pusher 2 stroke set up, call me quick to make a deal.
724 882 6788
I might be stating the obvious but be sure you do a runout check on your prop flange and inspect your motor mounts for tweaking, etc. while you have the prop off.
Contrary to popular folklore, the F model blades are NOT weak, especially in terms of bending-to-failure and you can definitely do damage in such a case.....
LS
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LS
Titan II SS |
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rowedenny
Joined: 09 Mar 2008
Posts: 338
Location: Western PA
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| Posted: Mon Jun 15, 2009 8:56 am Post subject: Spare Prop blade? |
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Its a 68 inch diameter, forgot that tidbit
[quote] ---
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NeilsenRM(at)comcast.net
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| Posted: Mon Jun 15, 2009 10:25 am Post subject: Spare Prop blade? |
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Powerfin props have a weight mark on the root end of each blade. When you
order a new blade they will balance to that weight. If you purchase a spare
blade from someone else you aren't likely to get a blade that will balance
which is a bad thing.
Also there was a recent comment about them being noisy. The are quiet till
the tip speeds get to high subsonic. When a prop tip nears supersonic speeds
it will turn a bunch of horse power in to noise. Tapered tips can get closer
to supersonic speeds and still remain fairly quiet. If the prop is noisy it
is turning too high a RPM. Change to a higher reduction ratio or reduce the
length of the prop. Generally speaking a Kolb airplanes like longer props
and slower prop RPMs for best performance.
Rick Neilsen
Redrive VW Powered MKIIIC
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mdnanwelch7(at)hotmail.co
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| Posted: Mon Jun 15, 2009 10:56 am Post subject: Spare Prop blade? |
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Denny C
Your tractor/prop mishap reminds me of mine. While trying to load my Kolb MkIII onto a flatbed trailer (in preparation to move out of state) C I lifted the entire plane up in the air with my Kubota backhoe and set it on the trailer. The loaded plane was just too top heavy on the trailer C so I lifted it back off. After untying the plane from my backhoe bucket C I thought I'd move the tractor out of the way......and then I drove the raised bucket into the prop blade.
You are right. I can't recall the tractor showing any signs of "give" when it came into contact with the blade. Can't recall any damage to the backhoe bucket. Evidently C tractors win every battle with airplanes.
I had a mishap once with my Cessna 172 and my 300ZX. I was parked under the wing C with the rear decklid up. I need to move the plane back a few feet and forget to lower the decklid. Sometimes C the airplane wins!!
I ended up mailing my entire prop back to Ivo Prop. They matched me a new blade to my existing two good blades C did a thorough balance check on all three C and replaced the stainless steel edges on all three. $200 total. Now C my prop's good as new. Tractor not allowed within 25'.
Best regards getting it fixed C
Mike Welch
MkIII GEO 1.0L Turbo Ivoprop
A John Deere 950 in low range does not give you any feedback that you are hung up on something.
Anyway C I'll be ordering a new prop blade from Powerfin later today along with a trailer dolly from harber freight to use to pull the bird and TEE trailer in and out of the hanger by hand. Funny how the $20 trailer dolly seemed expensive until the $200 prop blade was sacrificed.
Dang
Dennis Rowe
Mk-3 C 690L-70 C Powerfin F
PS: If anyone has a spare blade from a Powerfin F model pusher 2 stroke set up C call me quick to make a deal.
724 882 6788
Windows Live™ SkyDrive™: Get 25 GB of free online storage. Get it on your BlackBerry or iPhone. [quote][b]
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h20maule(at)hotmail.com
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| Posted: Mon Jun 15, 2009 11:38 am Post subject: Spare Prop blade? |
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Dennis C the Richter prop actually belongs to my father. I just spoke to him and he wants $200 but I told him I told you $75. I asked my dad if I could sell it for $150 and he said yes...sorry about that. Would that be a fair price? Sorry that i got your hopes up.Daniel
From: rowedenny(at)windstream.net
To: kolb-list(at)matronics.com
Subject: Re: Spare Prop blade?
Date: Mon C 15 Jun 2009 12:55:31 -0400
Its a 68 inch diameter C forgot that tidbit
[quote] ---
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rowedenny
Joined: 09 Mar 2008
Posts: 338
Location: Western PA
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| Posted: Tue Jun 16, 2009 3:54 am Post subject: Spare Prop blade? |
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I'll see if I can figure out how to do that later today.
Denny
[quote] -----
Would it be possible to see a photo of the damaged prop blade?
john h
mkIII
[b]
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