Coulda feathered the props

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pelmet
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Coulda feathered the props

Post by pelmet »

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ahramin
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Re: Coulda feathered the props

Post by ahramin »

It's pretty obvious he was having enough difficulties just keeping control of the airplane. In that case not worrying about shutting down the engines and feathering the props after touchdown is a good move.
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Big Pistons Forever
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Re: Coulda feathered the props

Post by Big Pistons Forever »

Worst thing you can do is feather the props in this situation. Rotating in fine pitch the tips just bend back as the props hit. Stopped and feathered the whole width of the blade is resisting the bending forces. This is a great way to break the crank and bend the engine mounts or warp the firewall.

All you should do is pull the mixtures to idle cutoff in the flare.
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magic wand
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Re: Coulda feathered the props

Post by magic wand »

Big Pistons Forever wrote:Worst thing you can do is feather the props in this situation. Rotating in fine pitch the tips just bend back as the props hit. Stopped and feathered the whole width of the blade is resisting the bending forces. This is a great way to break the crank and bend the engine mounts or warp the firewall.

All you should do is pull the mixtures to idle cutoff in the flare.
Really..from what source do you reference this piece of wisdom?
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cgzro
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Re: Coulda feathered the props

Post by cgzro »

That seems pretty sensible to me..
just try dragging a metal ruler along the floor in the two orientations and the one that apples the most force on your hand will be pretty obvious.
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xsbank
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Re: Coulda feathered the props

Post by xsbank »

If you pull the mixtures in the flare, the flare is going to stop being a flare pretty quick. Remember what an unfeathered prop does for your aerodynamics? X2?

Conduct a 'normal' landing first, then worry about shutting stuff off.
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Big Pistons Forever
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Re: Coulda feathered the props

Post by Big Pistons Forever »

xsbank wrote:If you pull the mixtures in the flare, the flare is going to stop being a flare pretty quick. Remember what an unfeathered prop does for your aerodynamics? X2?

Conduct a 'normal' landing first, then worry about shutting stuff off.
Good point I was think more about an all wheels up landing. In this case you should obviously wait until the mains have touched before pulling the mixtures to ICO. I stand by my contention that feathering the props is a bad idea
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JMACK
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Re: Coulda feathered the props

Post by JMACK »

Big Pistons Forever wrote:Worst thing you can do is feather the props in this situation. Rotating in fine pitch the tips just bend back as the props hit. Stopped and feathered the whole width of the blade is resisting the bending forces. This is a great way to break the crank and bend the engine mounts or warp the firewall.

All you should do is pull the mixtures to idle cutoff in the flare.


Bingo +1
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