Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Breaking prop on Shrike

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Old 02-03-2008, 08:09 PM
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cowboychris244
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Default Breaking prop on Shrike

I have flown my new Shrike three times now (and love it by the way), but each time on landing, I break the prop when it hits the ground. I kill the engine, and the prop always seems to stop in the vertical position, which doesn't make for a very pretty belly landing! I have tried mounting the prop in different positions, but it doesn't seem to help. Any suggestions?
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Old 02-03-2008, 08:21 PM
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Default RE: Breaking prop on Shrike

Don't go to Vegas.
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Old 02-03-2008, 09:39 PM
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Mike Connor
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Default RE: Breaking prop on Shrike

Tighten the prop down so the beginning of the compression stroke stops the prop horizontal.
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Old 02-03-2008, 09:40 PM
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Default RE: Breaking prop on Shrike

are you timing the prop to the engine compression? .. ie turn engine up to the start of compression and mount the prop sideways at that position.... be sure it's moving fast when you kill the engine, that way the air will rotate it up to compression.
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Old 02-03-2008, 10:08 PM
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Default RE: Breaking prop on Shrike

Not keeping it fast is my problem I guess. I was slowing it down to an idle before I would kill the engine. Fast landings goes against my better judgement, but I guess I will have to get over it!
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Old 02-03-2008, 11:02 PM
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Mike Connor
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Default RE: Breaking prop on Shrike


ORIGINAL: golddogs2@embarqmail.com

Not keeping it fast is my problem I guess. I was slowing it down to an idle before I would kill the engine. Fast landings goes against my better judgement, but I guess I will have to get over it!
The landings do not have to be fast to hold prop horizontal. I shut mine off from idle or run out of fuel at high rpm and the prop usually stops sideways if set right. Air pressure will push it horizontal when the engine dies and it will stay there regardless of speed through the landing.
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Old 02-03-2008, 11:20 PM
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Default RE: Breaking prop on Shrike

The Shrike builds nose heavy. If flown this way, it will not flare very good and landing speed will be high. If CG is a little rear of recommended, it will really slow down. I now have about 85 flights on my 10 Shrike and no broken props, only plane I have that I can say that about.
Good luck, MkeB
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Old 02-03-2008, 11:48 PM
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Default RE: Breaking prop on Shrike

I guess that came out wrong, kill the engine while you have some speed, then slow down for langing, like stated above moving the cg wll help you go even slower
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Old 02-04-2008, 12:30 AM
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Default RE: Breaking prop on Shrike


ORIGINAL: cncswiss1

I guess that came out wrong, kill the engine while you have some speed, then slow down for langing, like stated above moving the cg wll help you go even slower
I understood what you meant.
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Old 02-04-2008, 11:28 AM
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Default RE: Breaking prop on Shrike


ORIGINAL: golddogs2@embarqmail.com

I have flown my new Shrike three times now (and love it by the way), but each time on landing, I break the prop when it hits the ground. I kill the engine, and the prop always seems to stop in the vertical position, which doesn't make for a very pretty belly landing! I have tried mounting the prop in different positions, but it doesn't seem to help. Any suggestions?
One suggestions....

how ever you chose to install the prop now.......
... install it 90deg from that position.

A few test runs on the ground will prove it out... you just want the prop to naturally stop horizontally.

And as others have noted, it will not turn past compression in glide, so you can error toward the compression side a bit.
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Old 11-24-2008, 09:07 PM
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Default RE: Breaking prop on Shrike

Put the prop parrel with the wing when the engine is in the beging of compression.
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Old 11-25-2008, 01:15 AM
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Default RE: Breaking prop on Shrike

Mount your prop & just snug it up so it does'nt slip on the shaft when you rotate it. Rotate the prop counter clockwise till it hits compression, this is where your prop will stop when you kill your engine. If it's not parallel with your wing just loosen the prop nut & rotate the prop as needed. Tighten down & check again against compression. It may take you a couple of trys at this till you get the understanding on how this works but in the end there will be less broken props.
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Old 11-25-2008, 10:26 PM
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Default RE: Breaking prop on Shrike

i just bought a shrike 40 used, downloaded the manual it say's the cog is 5 7/8 in or 148mm. is that correct or do you have any recommendation's...thank's
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Old 11-27-2008, 09:57 AM
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Default RE: Breaking prop on Shrike

That's correct, they are a blast!
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