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Richard Pike
Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee
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 Posted: Sat Dec 23, 2006 1:10 pm Post subject: MKIII Dihedral |
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Since the FSII flew hands off so well with a bunch of dihedral, decided to try it on the MKIII and see if it could also be made to fly hands off. You can see from the pictures how much dihedral is in the FSII, and how much is in the MKIII, but the results were not at all alike. Could not come up with a combination of trim or throttle settings that would enable hands off flight. It was better than before, but just barely, it was still impossible to pick up a low wing with rudder. There was a small amount of turbulence, but very small. Perhaps if I had a passenger so that it was balanced on each side, and the air was glass smooth, or maybe if I had a full fuselage that ran up to the base of the wing - who knows?
Anyway, my initial tests show that dihedral is of no apparent value on this MKIII, your results may vary. None of the other flight characteristics seemed any different. Will probably put it back like it was. The gap seal fits better that way...
Richard Pike
MKIII N420P (420ldPoops)
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David Lucas
Joined: 10 Jan 2006
Posts: 79
Location: Europe. based Amsterdam NL
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| Posted: Sun Dec 24, 2006 5:11 am Post subject: Re: MKIII Dihedral |
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Richard,
Seems like your a little disapointed in the results after all the trouble of increasing dihedral. Vis; | Quote: | | it was still impossible to pick up a low wing with rudder |
,
Have you ever heard of 'Canted Tabs'. Perhaps they would work in your situation.
Read all about it here; http://www3.lehigh.edu/engineering/news/grenestedtinventstabs.asp
If you do a Google search, you'll also find a few other entries on 'Canted Tabs'.
Happy Christmas,
David.
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David.Lehman
Joined: 10 Jan 2006
Posts: 265
Location: "Lovely" Fresno CA
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| Posted: Sun Dec 24, 2006 6:54 am Post subject: MKIII Dihedral |
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Besides all that Rev., it looks funky...
On a different note, my original Firestar has a canopy like the FS II in the picture and the top of the fuselage sides (under the wing) are open as well... Thinking I might cut a little wind and noise, I covered the openings with Lexan and went out flying... The coverings cut my airspeed considerably, I removed them and things went back to normal... A buddy flying beside me, said he could see the difference in AOA with and without the coverings... My theory is that the coverings robbed air from the prop...
Merry Christmas...
DVD
do not archive
On 12/23/06, Richard Pike <richard(at)bcchapel.org (richard(at)bcchapel.org)> wrote: [quote]--> Kolb-List message posted by: "Richard Pike" <richard(at)bcchapel.org (richard(at)bcchapel.org)>
Since the FSII flew hands off so well with a bunch of dihedral, decided to try it on the MKIII and see if it could also be made to fly hands off. You can see from the pictures how much dihedral is in the FSII, and how much is in the MKIII, but the results were not at all alike. Could not come up with a combination of trim or throttle settings that would enable hands off flight. It was better than before, but just barely, it was still impossible to pick up a low wing with rudder. There was a small amount of turbulence, but very small. Perhaps if I had a passenger so that it was balanced on each side, and the air was glass smooth, or maybe if I had a full fuselage that ran up to the base of the wing - who knows?
Anyway, my initial tests show that dihedral is of no apparent value on this MKIII, your results may vary. None of the other flight characteristics seemed any different. Will probably put it back like it was. The gap seal fits better that way...
Richard Pike
MKIII N420P (420ldPoops)
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"Both optimists and pessimists contribute to the society. The optimist invents the aeroplane, the pessimist the parachute."
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Richard Pike
Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee
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| Posted: Sun Dec 24, 2006 11:55 am Post subject: MKIII Dihedral |
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This one has a tapered Lexan fairing that goes behind the factory cockpit enclosure, and we have flown it with and with out the rear Lexan. Without the rear lexan fairing, the speed goes down, and it loses some rudder authority. Since we have the Lexan tapered, hopefully it enable wind to the prop.
Richard Pike
MKIII N420P (420ldPoops)
dna
[quote] ---
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_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing. |
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