ORIGINAL: phlpsfrnk
ORIGINAL: dick Hanson
The FAA exerpts are fine -if you are flying a Cessna 150 - or other underpowered overweight lightplane .
the relevance to our stuff tho -is HIGHLY speculative.
There's nothing "speculative" about aerodynamics that can be voted away. I've flown "underpowered overweight" C172s in ground effect during soft field takeoffs and I've also flown scale 76" overpowered .60 J3 cubs and other scale planes in ground effect. The aerodynamics are the same. Its just how we get there that's different. As RC pilots the more one attempts more scale like takeoffs and landings the more you
will come into contact with ground effect.
Regards
Frank
"Takeoffs are optional. Landings are mandatory"
Frank I can't buy it .
I have too much flying time in models ranging from 5 ounces to 45 pounds .
The largest ones ar still so smal that the change in pressure beneath the model is "minute " to say the least
Now take a 767- those wings
capture a lot of air and you don't need any education in aerodynamics to see the huge plumes of dust /vapor moving under and aft the wings
Mother nature simply takes th easiest path and IF the wing is big enough and travelling fast enough there is a definite change in pressure beneath
but little stuff really can't restrict the air movement and make pressure differences like large stuff can
sure "theory"is fine but unles it cn be practically applied - it is worthless.