Author Topic: Maule flap settings  (Read 5312 times)

Offline amcquiddy

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Maule flap settings
« on: November 23, 2007, 08:34:23 PM »
 On the Maule website the flap settings for the M-7-23 are listed as follows:
                              -7, 0, 24, 40, 48 (degrees)
I understand the purpose of the 0 thru 48 degree flap settings.  The -7 not
so much.  This would decrease lift.  My guess is that it would decrease ground
roll by putting extra weight on the wheels during rollout.  Could someone please
tell me what purpose these would serve in flight?
Thanks

Offline G-man

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Re: Maule flap settings
« Reply #1 on: November 23, 2007, 08:56:20 PM »
On the Maule website the flap settings for the M-7-23 are listed as follows:
                              -7, 0, 24, 40, 48 (degrees)
I understand the purpose of the 0 thru 48 degree flap settings.  The -7 not
so much.  This would decrease lift.  My guess is that it would decrease ground
roll by putting extra weight on the wheels during rollout.  Could someone please
tell me what purpose these would serve in flight?
Thanks

Severe updrafts in turbulence maybe.. ::thinking::
 I do know that some helicopters have a "negative pitch" setting on the collective, this is for ship borne operations, to hold it on the deck until it can be tied down.

But don't listen to me--Last time I was "Mauled", was in a whooooore house in Gibralter back in the 80's..  ::whistle:: ::whistle:: Can ya tell I'm bored today..  ::type::
Life may not be the party we hoped for---but while we're here--we might as well dance..........

Offline Fabo

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Re: Maule flap settings
« Reply #2 on: November 23, 2007, 09:00:22 PM »
Could be. I have readen negative flap is used in cruise, so maybe it lets for higher Vmax with decreased lift.
"When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return."

Offline Rooster Cruiser

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Re: Maule flap settings
« Reply #3 on: November 23, 2007, 09:06:34 PM »
Could be. I have readen negative flap is used in cruise, so maybe it lets for higher Vmax with decreased lift.

You are correct, Fabo.  The negative flap setting is to allow for a higher cruise speed by decreasing the amount of induced drag created by the wing.  At higher cruise speeds more total lift is generated at flaps zero than needed to keep the ship airborne, so the flaps may be retracted further to reduce the camber and resultant induced drag.
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Offline Fabo

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Re: Maule flap settings
« Reply #4 on: November 23, 2007, 09:11:40 PM »


Sorry could not resist clapping meself  ::wave:: |:)\
"When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return."

Offline Franz

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Re: Maule flap settings
« Reply #5 on: November 23, 2007, 09:15:40 PM »
Some gliders also have flaps which negative settings. As Fabo already mentioned, they are used for decreasing drag when flying at higher speeds.
As you all know, a slim airfoil equals little lift and drag, and vice versa. Also, at higher speeds, more lift and more drag is produced.
So, with negative flap settings, you reduce drag and lift, which then can / must be compensated by flying faster.

I hope I managed to express myself understandably. If not, let me know, I'll rewrite this when I'm not about to get some sleep  ::sleep::
And, I should type faster . . . .

Offline amcquiddy

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Re: Maule flap settings
« Reply #6 on: November 24, 2007, 12:40:20 PM »
  That makes a lot of sense.  Are there any other powered aircraft that have the negative flap setting?