RE: Great Planes Seawind   
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RE: Great Planes Seawind - 6/20/2009 11:51 PM   
hattend



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From: King Salmon, AK, USA
Status: offline 		Hey Rossco,

How'd that 3" extension to the step work out for you?  It's now June and getting into winter for you.  Hope you got some flights in before the weather turned bad.

Don

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RE: Great Planes Seawind - 7/10/2009 10:08 PM   
hattend



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Status: offline 		Didn't mean to break the thread.

Don

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RE: Great Planes Seawind - 9/9/2009 2:05 PM   
wloomis15@comcast.net


 

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From: Ridgefield, CT, USA
Status: offline 		Hi,

Every year I fly my GP Seawind at our summer place in the 1000 Islands, near Gananoque ON, Canada. Previous posts can be found at yearly intervals in this thread(i.e. see Post 1035). I've had a lot of trouble getting my Seawind to take off from water without porpoising. Being stubborn it's taken a while to absorb/comprehend what I hear in this thread, but I may be catching up to the rest of you. This year I had good success on takeoff by holding full up on the elevator as the Seawind gathers speed. I was also using nearly full flaps. Previously as the plane gathered speed, I would try and level the aircraft so as to plane on the water and gather speed. This causes the plane to porpoise and become a submarine. Seen from the top, the Seawind has a huge proportion of its hull area in front of its nominal CG. That large amount of hull, I believe, is what causes the porpoising. Holding up elevator keeps much of the front hull out of the water, so that the porpoising tendency is damped and take off is controllable. This year it worked for me.
Another feature of holding up elevator is that once some speed is gained, the rudder has enough effect to keep the tip floats out of the water, so they can't dig in. BTW, I seem to break the small rod fitting that couples the water rudder to the air rudder about every flight - does anyone have a better way to do this?

Regards

Tony Loomis
AMA #76638

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RE: Great Planes Seawind - 9/9/2009 4:15 PM   
normgoyer


 

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From: Apple Valley, CA, USA
Status: offline 		Hi Tony, You have discovered something that is standard operational procedure for all full scale seaplane pilots. When starting a takeoff run, its full up elevator and then as speed increases pressure is reduced on the elevator allowing the nose to lower. When the airplane is level and planing apply a bit of up elevator and the aircraft will fly. If it settles back on the water DO NOT APPLY DOWN ELEVATOR AT ANY TIME. Hold the slight up elevator position and the plane will fly. I have been a certified seaplane pilot for over 60 years and have flown many types from 50 hp Cubs to 600 hp turbine powered amphibians. The rules are the same. Norm

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RE: Great Planes Seawind - 9/25/2009 6:49 AM   
Bob93447


 

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From: Playa del Rey, CA, USA
Status: offline 		Has anyone tried using upthrust with the Seawind? It may be possible that the propwash from upthrust would hold the stabilizer down. Certainly one of the "attributes" of this design is that a sudden increase in power, with neutral incidence of the motor, causes the nose to drop. Or maybe just holding full up elevator is the way to go on takeoff.

Bob

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RE: Great Planes Seawind - 9/25/2009 6:56 PM   
sylo26


 

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From: Valdor, QC, CHAD
Status: offline 		Hi ! I ,my winter project is to set up this nice ARF ,but somebody could tell me if my saito .91 surpass will be good and fast for the seawind ? I saw that some guys putted a saito 100 and more ! What do you think about that ? Thanks ! paul

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RE: Great Planes Seawind - 9/25/2009 8:21 PM   
obiwan12


 

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From: Escanaba, MI, USA
Status: offline 		Paul if you go the Saito route, good luck with that. I had a Saito 91 on mine and the vibration shook the nacelle so much that it eventually developed hairline cracks all throughout the back of the fuselage leading to structural failure. You are better off with a good OS 75AX back there, they weigh the same but it'll have less vibration. This plane isn't about how much power you can strap to the nacelle but rather how well you manage your power to properly fly the airframe.

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RE: Great Planes Seawind - 9/25/2009 9:35 PM   
jet22b


 

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From: Olympia, WA, USA
Status: offline 		Paul,

I have a OS 91 Surpass motor on my Seawind. Good power for this bird on land and water. I agree with obiwan12 in his post about the manage of power to fly this bird.
Have fun!!

Sonny

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RE: Great Planes Seawind - 9/26/2009 3:42 PM   
sylo26


 

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From: Valdor, QC, CHAD
Status: offline 		Obiwan ,I understand what you say;I have two Saito .91 surpass and one of them is really soft ,and the other have more vibrations ,and I don't know why. And Sonny , you didn't have problems with the structure ? The thing is that I already have this saito .91 surpass,that's why I would like to put it on the seawind. Also , it's looks like a hard thing to take off and land on water ; was it a bad experience for you guys ? Thanks ! Paul

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RE: Great Planes Seawind - 9/26/2009 4:18 PM   
jet22b


 

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Status: offline 		Hi Paul;

I now have over 25 flights on my Seawind and no problem with the tail structure. My OS 91 has a soft vibration even at full power!! To answer your other question, yes, the Seawind can be a pain to takeoff from water. If you read back in this post, you will see what other people say about the water takeoff. In the air this bird fly llike a dream and a joy to fly. My first flights was off of land, just to get the feel of the plane. I hope this help you out. Keep me post on your outcome!!
Have a great day of flying!!!

Sonny

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RE: Great Planes Seawind - 9/26/2009 4:38 PM   
sylo26


 

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From: Valdor, QC, CHAD
Status: offline 		Excuse me Sonny , I tought you had a 4 strokes ! So you have a .91 2 stroke on your seawind; am I right ? Sorry if I misunderstanting , my english is not very good ... Paul

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RE: Great Planes Seawind - 9/26/2009 5:54 PM   
jet22b


 

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From: Olympia, WA, USA
Status: offline 		Paul,

The engine is a OS 91FS Surpass, ( 4 stroke )

Sonny

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RE: Great Planes Seawind - 11/24/2009 7:00 PM   
corsair-wb



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From: Edmonton Alberta, AB, CANADA
Status: offline 		Ok was lucky a freind picked up a set of the seawind retacts for dirt cheep and has no use for them, I will be putting them in my seawind but have heard of problems with them and can not remeber where the posts are or why they were having the problems. If someone can point out the page or if it was on another thread, or even repost it here I would be thankfull for it.

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All Forums >> RC Airplanes >> Seaplanes >> RE: Great Planes Seawind
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