** Kline-Fogleman (KFm) Airfoils - Building/Flying Discussion ** - Page 651 - RC Groups
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May 26, 2018, 03:55 PM
Build straight - Fly twisty
Whiskers's Avatar
Quote:
Originally Posted by RexGalore
I'd have accepted 90mph.
What's 0.098822874413 mph between friends?
8.696412948344 feet per minute, now that you ask

Dick's headline sure grabbed my attention
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May 26, 2018, 04:17 PM
Out Standing In The Field
RexGalore's Avatar
Quote:
Originally Posted by Whiskers
8.696412948344 feet per minute, now that you ask

Dick's headline sure grabbed my attention
That sounds slooooooooooooooooooooooow, to me anyway.
But we're still friends, anyway!
Latest blog entry: Rare Bear
May 26, 2018, 05:23 PM
"long stretch of water..."
coongoola's Avatar
Quote:
Originally Posted by Whiskers
8.696412948344 feet per minute, now that you ask

Dick's headline sure grabbed my attention
Hah. I could probably fly my Nutball that slow. 😀✈

Pat
May 26, 2018, 08:02 PM
looking up, down under
scruffy1's Avatar
Quote:
Originally Posted by Whiskers
8.696412948344 feet per minute, now that you ask

Dick's headline sure grabbed my attention

i hope you don't do your own accounting
May 26, 2018, 09:22 PM
Build straight - Fly twisty
Whiskers's Avatar
Quote:
Originally Posted by scruffy1
i hope you don't do your own accounting
No I don't. I cohabit with The World's Greatest Book-keeper.

Are you saying that 0.098822874413 mph is not 8.696412948344 feet per minute? I am notoriously bad at math.
May 26, 2018, 09:58 PM
looking up, down under
scruffy1's Avatar
i just re-read the post - your maths is probably correct (didn't obsessively check), but my interpretation of the speed you were referencing i thought was the actual speed of the plane, not the difference in the calculation of the speed

seemed ~8.7 feet per minute was less than stall speed

carry on !
May 26, 2018, 10:10 PM
Build straight - Fly twisty
Whiskers's Avatar
Ah yes, one hundredth of a mile per hour would indeed be slow.
The guys who are obsessed with hovering do ground-speeds like that. (yawn)
Jun 12, 2018, 01:55 PM
scratchbuilder
Thomas B.'s Avatar

KFm 2 in ground effect


I managed to get the Ekranoplan to fly in ground effect. On the passes at the beginning of the vid, there was no need to touch the elevator. When it descended towards the water, the compressed air lifted it automatically- enjoyable and relaxing super low flying!

Modell-Aviator Ekranoplan am Edersee (1 min 47 sec)
Jun 12, 2018, 02:22 PM
Registered User
Sr71freak's Avatar
fpv cuda launched off school buss (9 min 24 sec)

my bus doing work. Got to love that kfm3!

one day I need to actually see how much she will lift.
Jun 12, 2018, 04:26 PM
Registered User
Dickeroo's Avatar
Quote:
Originally Posted by Sr71freak
https://www.youtube.com/watch?v=GEqeJ0IAkNQ
my bus doing work. Got to love that kfm3!

one day I need to actually see how much she will lift.
Some years ago, the Bloody Micks did some testing between a conventional airfoil and a KFm3. One of the tests was weight lifting. The sound cuts out at one point, but then returns. The KFm3 was able to lift 79oz. compared to 71oz. for the conventional airfoil. They conducted other tests for stall and stability as well.

weight lifting part 3 (6 min 10 sec)
Jun 12, 2018, 04:47 PM
Registered User
Sr71freak's Avatar
Quote:
Originally Posted by Dickeroo
Some years ago, the Bloody Micks did some testing between a conventional airfoil and a KFm3. One of the tests was weight lifting. The sound cuts out at one point, but then returns. The KFm3 was able to lift 79oz. compared to 71oz. for the conventional airfoil. They conducted other tests for stall and stability as well.

https://youtu.be/rspdbPaMY9c
Thanks, I'll check that out after work.


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