RE: Great Planes Seawind   
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RE: Great Planes Seawind - 12/13/2005 9:02 PM   
MinnFlyer



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Status: offline 		Well, I will say this: Seeing as how my retracts are designed to use a Sullivan Gold-n-rod, they are probably the ONLY mechanical retracts that would be practical.

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RE: Great Planes Seawind - 12/13/2005 9:12 PM   
RVman


 

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Status: offline 		yeah that and they are the only ones that i could find that will take the weight

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RE: Great Planes Seawind - 12/14/2005 12:24 AM   
seanychen



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quote:

ORIGINAL: Fast Freddy

RCV ENGINE FOR SEAWIND
Anyone have any opinions on using an RCV engine for the Seawind? Their slim profile and high power to weight ratio might make it an ideal candidate. Any thoughts would be appreciated.


I looked at the RCV 91, and its power is not too impressive. It's about the same as Saito 72 or OS 70 Surpass, swinging APC 13x6 @ 10500 rpm, APC 13x8 @ 9600 rpm, APC 14x6 @ 9000 rpm. It should swing Graupner 12x5 x 7 3-bladed prop at mid 9k, so should fly the plane. As for dimension, its height from crank shaft center to top of head is 81.4mm, so the head will just stick out the cowl a little. But the intake manifold should be contained.


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RE: Great Planes Seawind - 12/14/2005 1:39 AM   
Fast Freddy


 

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Status: offline 		Sean, Yeah I agree, I think the RCV will be underpowered. I think I will go with GP original recommendations, either an OS 60 FX 2s or a 90/91 4s. Thanks

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RE: Great Planes Seawind - 12/15/2005 3:43 AM   
seanychen



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Status: offline 		I have thought about using YS 63-S on this plane. It will fit quite well, with only the slim black valve cover sticking out. Muffler can even be routed to exit from the side aft airscoop right behind the cowl, through the use of a 90 deg elbow. Power of YS 63 on 30% nitro is stronger than a normal 61 2-stroke.

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RE: Great Planes Seawind - 12/15/2005 11:27 PM   
Strykaas



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Status: offline 		Any building/setup pix, guys ?? We haven't seen many

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RE: Great Planes Seawind - 12/16/2005 12:23 AM   
RVman


 

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Status: offline 		just wait a few days and i should have some pics up soon

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RE: Great Planes Seawind - 12/16/2005 3:54 AM   
Hookedonairplanes


 

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Status: offline 		Hey there,

Easy to fix the canopy. Get rid of the plastic canopy and replace it with a FRP one. The clear plastic on the canopy is completely painted anyway. Furthermore, with a FRP canopy you could, more than likely get rid of the framing inside as well.

Roy

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RE: Great Planes Seawind - 12/16/2005 3:59 AM   
PaulG-RC



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Status: offline 		You lost me Roy

FRP ?

Paul

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RE: Great Planes Seawind - 12/16/2005 2:30 PM   
jetlag


 

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Status: offline 		Free Range Plastic? How do catch those little guys?
Allen

Seriously though, is it fiberglass-reinforced plastic?

< Message edited by jetlag -- 12/16/2005 2:31 PM >

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RE: Great Planes Seawind - 12/17/2005 4:23 AM   
RVman


 

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Status: offline 		I started on the plane today. i got the engine mounted and cowl all cut out and thats about it for now. All the formers in the main fuse are loose and the balsa sheet for the rudder hinges is broken at the bottom. Since i am going to be cutting a hole for the water rudder i will fix the rear formers then. I was a little disappointed by the loose formers but otherwise the plane is perfect and the canopy is perfect as well nothing loose. The finish on the plane is outstanding way better than what i could do. I am still waiting for my servos, retracts and stuff to get here.

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RE: Great Planes Seawind - 12/21/2005 1:17 AM   
Skyventures



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Status: offline 		Hello Tom G.,
What balsa sheet are you referring to that is cracked?

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RE: Great Planes Seawind - 12/23/2005 12:33 AM   
maxiemac


 

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Status: offline 		I have read these posts with interest but since late October I havent read where anyone has actually flown off water and reported their findings. I have just learned of one Seawind 'downunder' that 'digs in' badly when trying to take off. From the Tower Hobbies video the takeoff is from very smooth water - what happens when there is a one to two inch ripple on the water? Any comments?

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RE: Great Planes Seawind - 12/23/2005 2:18 PM   
gouda


 

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Status: offline 		Look at the other Seawind thread. That has actualy flight reports>
http://www.rcuniverse.com/forum/m_3486829/tm.htm

I don't recall the problem you mention.

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RE: Great Planes Seawind - 12/23/2005 5:35 PM   
flying_phil


 

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From: Lenexa, KS, USA
Status: offline 		I've been building my Seawind a little every day and could definately rewrite the instruction manual, especially in the order they tell you to do things.

First, they should have had you put the fuel tank hatch on first so you don't screw into the tank with screws that are too long. Since the tank rests against the wood blocks under the hatch, I should have shortened the screws but didn't want to take the tank out.
Oh well ,no big deal.

I was attaching the elevator yesterday to find that it was warped by about a 1/4 inch with the hinges in place. Called GP and asked if they had a recommend fix and they said they would ship me a new elevator/rudder kit. It was shipped today. How's that for customer service.

I installed the fixed landing gear and they are the strongest gear components I've ever seen and will be easily removed and covered when I fly off water.

Merry Christmas to all,

Phil

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RE: Great Planes Seawind - 12/26/2005 10:45 PM   
RVman


 

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Status: offline 		ok some pictures... I managed to get the nose gear mounted which was a lot of work. I had to move one of the mounting blocks foward to allow for room for the steering. Also i had to get the retract pushrod all hooked up and working well. Next step on the nose is the doors.
Any ideas on how to do it??? I can hardly use a normal C type door hinge since there is no recess in the compartment. Also it is the wheel well is very narrow which complicates things. I don't know what other type of hinge would work since i want the door to close with minimal gap all around.
I think the best option will be to cut a recess into the wheel well and mount a C door hinge in the recess therefore the doors will close flush and not be in the way of the gear coming down.
The main gear and a few other odds and ends have not arrived yet (Christmas season probably slows them up).
I have weighed the plane with everything i have. 9 lbs 4.4 oz for the whole plane minus: wing servos, main gear, nose gear doors, water rudder assembly, ballast and other misc stuff. I can't see it coming in much over 11 lbs. Saito 82 for power.
Pics,..

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RE: Great Planes Seawind - 12/27/2005 12:16 AM   
bigguyplanes


 

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Status: offline 		Hi Allan...what elevation are you at ?Is your 12:7 prop a 2 blade or three ? Any problems with the stock muffler?I want to use the 61 2 stroke as well, but we are at 2300 feet here and I was wondering if it will be enough. Thanks in advance.............. Allen

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RE: Great Planes Seawind - 12/27/2005 6:31 PM   
jetlag


 

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Status: offline 		Allen
The altitude we fly from is anywhere from sea level to a couple hundred feet. The prop I'm using on the Seawind is currently an 11x7 Master Airscrew 3-blade. It's what I used on the craft's first four flights. I want to try a 12x6 3-bld, also. I used an 11x9 APC 2-bld on another plane with a pitts muffler and it was a respectable 'fast'. Make sure to mount your .61 sideways, NOT upsidedown. Mount it so the muffler is on the bottom, cylinder pointed out to the right (pilot's right); this is necessary to keep the fuel from siphoning onto the fuselage.
The cut out for the stock muffler is not too bad. With a pitts, you might very well have to cut out a lot more. I just didn't want the exhaust to be directed right into the top of the fuselage. In the air it looks fine. Mine weighs about 12 pounds without any landing gear whatsoever. I elected not to move the tank to the cg; it is in the stock location.
Oh, watch those tank hatch screws; I, too, drilled my holes and forgot about the tank sitting below ...whoops!
Don't believe the manual's measurement from the firewall to the spinner back plate...it is too far. Measure your own, but mine needed to be about an eighth of an inch closer.
As to your question about whether the 2300 ft altitude might pose a problem, my answer would be a guess. If it were me, based on what I had read of others' experiences near sea level, I might be tempted to go with more pitch and max out your diameter (12.5 inches?) or go to a .91FX. I'm sure someone has flown a Seawind from higher altitudes than I have. Check out that entry by gouda above.
Hope this helps
Allen

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RE: Great Planes Seawind - 12/28/2005 5:24 AM   
flyanything


 

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Status: offline 		Got a Seawind for Christmas and I just finished reading this entire thread. I inspected the contents of the box and there appears to be no damage. I'm thinking about doing a Saito 100 with the appropriate 3 blade prop. Has anyone installed/flown the Robart retracts made for this plane?

John

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RE: Great Planes Seawind - 12/28/2005 6:29 AM   
Hookedonairplanes


 

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Status: offline 		Hi there,

Wiggle the bulkheads and squeeze the sides and see if there are any cracks that open on the edges (just a little squeeze an wiggle) :-)

They might not be apparent. Are the bulkheads glassed in?

Roy



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RE: Great Planes Seawind - 12/28/2005 3:10 PM   
Stevenhilton


 

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Status: offline 		I do want to thank the members of this thread. I went back and checked the bulkheads and found two loose which were easily fixed with 30 minute epoxy. I am spending allot of time on this one as a minor oversight (actually cheap components) on my Neptune caused me to lose the plane yesterday. Apparently cheap imported Nyrods do not work well in the cold. Actually they break off when applying elevator. I don't know if any of you folks have landed without an elevator but I did, About 60 mph nose first into a frozen corn field. The debris field was impressive but 500 bucks for two flights is not a good investment to me.
Steve

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RE: Great Planes Seawind - 12/28/2005 3:17 PM   
PaulG-RC



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Status: offline 		This is very sad to read about, I also never use those nylon rods as they do change with cold and hot.
In the cold they become stiff and brittle and in the hot they shrink.

Paul

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RE: Great Planes Seawind - 12/28/2005 3:22 PM   
Stevenhilton


 

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Status: offline 		Lesson learned. Will go with flex cable. Since it was a defect, I have a meeting with the suppliet later today with the hope that they will cough up a new plane. The instructions do not say "Do nto fly in cold weather" and they seemed receptive to doing something for me as I do spend a crap load of money on the hobby and at my local Hobbt Shop.

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RE: Great Planes Seawind - 12/28/2005 3:27 PM   
PaulG-RC



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Status: offline 		I hope it turns out ok for you.
Not because its a water plane it cant be flown off snow in cold weather.

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RE: Great Planes Seawind - 12/28/2005 3:59 PM   
nexxa


 

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Status: offline 		(Excuse my English!)

Finally, I receive for Christmas my SeaWind, a JR flight pack, an OS.91FX, 2 APC Prop (11X8 and 12X6 3 blades), Hobbico mechanical retracts 3-Gear. Ok maybe I will not receive gift for the next 5 years…!

I read the entire post, and I already start with some modification. I glass and add some ¼ scare hardwoods at week place in fuselage. I glass the wing for the retract system and install the retracts on both wing. Inside the fuse, I epoxy the aluminium brass and install a homemade servo holder in plywood for the wings retracts directly epoxy to the aluminium brass.
I’m now working on the nose retracts. I cut the original hardwood block and fibreglass, and glue the new one in place…. Need to glass and repaint the nose wheel hole now and reinstall it. I’m waiting for my pushrod seals.
I’m planning to fly the seawind with the retract system on water and land.

For the engine, I’m not sure… how to install it. On the side or standard. I don’t want it upside down, to difficult to adjust, start…. And it’s making a mess on the fuse. I want to used the original muffler; this is why… somebody as install a 2 stroke engine with the original muffler? I need some pictures to figure it out correctly!

Another thing, we are supposed to use micro servos with metal gears for rudder and elevator, a little bit expensive I think! I plan to use my JR 537 servos….


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