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Water take off speed

Old 03-22-2010, 07:40 PM
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rickburnout666
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Default Water take off speed

Just getting back into things, and want to know, if anyone knows (i'm sure someone out there does) What speeds do the planes reach before take off, .40 engine + high wing trainer, plane weight 8lbs approx,
hope someone can help, thanx
Old 03-22-2010, 08:39 PM
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jimmyjames213
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Default RE: Water take off speed

ORIGINAL: rickburnout666

Just getting back into things, and want to know, if anyone knows (i'm sure someone out there does) What speeds do the planes reach before take off, .40 engine + high wing trainer, plane weight 8lbs approx,
hope someone can help, thanx
its just going to depend on the plane, the airfoil/weight/drag of the floats/ect
but at eight pounds (heavy for a .40 sized trainer) id guess maybe 25-35 mph
my 5.5lb trainer will take off at about 15-20 mph (on land), its a spad so its a little higher than some.
the tower trainer rtf, im guessing will fly at 15 mph, maybe less.

what is the reason behind this?
Old 03-22-2010, 10:18 PM
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rickburnout666
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Default RE: Water take off speed

I said trainer, i mean its a trainer style design, made from corrugated plastic of sorts, weight is about 4.5lbs with the floats (not 8lb, my mistake) -3.5lb should help with the take off speed
Old 03-23-2010, 07:17 AM
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Default RE: Water take off speed

A stock LT-40...high wing trainer, trike gear....will come off the ground at around 30 MPH and stall at about 28 MPH....full power level flight at around 70 MPH....I don't remember where I read that but it has stuck with me over the years.......I sold a modified LT-40 to my son in law's dad, he's a retired cop.......with a radar gun he was clocked at 72 mph in level flight.....kinda validates what I read
Old 03-23-2010, 03:25 PM
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jimmyjames213
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Default RE: Water take off speed


ORIGINAL: rickburnout666

I said trainer, i mean its a trainer style design, made from corrugated plastic of sorts, weight is about 4.5lbs with the floats (not 8lb, my mistake) -3.5lb should help with the take off speed
ahh ok, its a spad. i would guess would be around 15mph depending on the size of the wing and the prop you are useing.
my 48in, 5.5lb spad will takeoff at about 18-20mph.
Old 03-24-2010, 12:15 AM
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Default RE: Water take off speed

I guess I'd ask how long is your runway to get 8 lbs moving up to take off speed?
Old 03-24-2010, 07:22 AM
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Default RE: Water take off speed

You should be able to get an 8 Lb trainer style airplane powered with a 40 or 46 using a 10/11X 6 or 7 prop in the air in less than 30 or 40 ft I would think....

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