Roost Air Lounge => The Classroom => Topic started by: amcquiddy on November 23, 2007, 08:34:23 PM
Title: Maule flap settings
Post by: amcquiddy 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
Title: Re: Maule flap settings
Post by: G-man 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::
Title: Re: Maule flap settings
Post by: Fabo 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.
Title: Re: Maule flap settings
Post by: Rooster Cruiser 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.
Title: Re: Maule flap settings
Post by: Fabo on November 23, 2007, 09:11:40 PM
Sorry could not resist clapping meself ::wave:: |:)\
Title: Re: Maule flap settings
Post by: Franz 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 . . . .
Title: Re: Maule flap settings
Post by: amcquiddy 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?
