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Float Plane for a GMS .75

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Old 12-18-2013, 07:30 AM
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Blitzz
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Default Float Plane for a GMS .75

Hello,

I am looking for a ARF plane that I could put on floats that would be a good match for a GMS .75 2C that I have laying around from a previous plane. This is going to be my first float plane but I have many other planes and experience flying. I am looking at a few different ARF's such as the Hangar 9 40 size Cub as well as the Seagull 40 size decathlon and the larger super decathlon. I am leaning towards the cub as they look awesome on floats but I am unsure if the engine will physically fit on this plane. Any input or any recommendations?

Cheers,

Jason
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Old 12-18-2013, 08:49 AM
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I like a little extra power but I think a 75 2-stroke in a 40 size airframe is too much. I would look for a 60 size airframe.
It seems like the GMS 75 and the GMS 61 engine are the same weight and size, the 75 is just a bored-out 61.
Horizon has really thinned out their plane selections but I would look at a few models from Seagull. Seagull makes good planes for the price...in my opinion. Look at the Christen Husky 60, , Glasair Sportsman 75 ,they also make a Decathalon and a Cub in a 75 size too.
If you can find a Beaver or Taylorcraft in a 60 size they make good float planes too
If you want to have some fun ,get a 60 size Stik on floats
One of my most stable and scale flying planes is an older SIG Kadet , but that was a kit. If you can find one already built that would be a great choice too.

Last edited by flyinwalenda; 12-18-2013 at 08:52 AM.
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Old 12-18-2013, 09:16 AM
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Thanks for the reply, I have been looking the Christen Husky and looks to be a nice plane. Just wondering does adding floats require a plane to have more power than if you were just using wheels?
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Old 12-18-2013, 09:36 AM
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Yes the floats and mounts add a little extra weight so you want to look for the lightest set and rigging you can. The trick is to get the floats set-up correctly with the plane as far as aligning the floats step in reference to the CG of the wing and the floats incidence with the wing. Once that riddle is solved and the floats and rigging are not too heavy almost any high wing plane will get in the air once the plane "gets on step". Sometimes you have to experiment with different props too .
I just think you would have some trouble getting a 61 size engine in a 40 size plane and have any cowl left although I'm sure it's been done before. It really depends on the plane, size of the cowl, etc...
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Old 12-18-2013, 10:05 AM
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http://www.rcgroups.com/forums/showt...?t=1706328Take a look at this thread from RCG, it may help you with your project also open the link for the CG floats manual, there at the end you will find info on how to set up the floats on a full or semi semitrical wings.Hope this helps
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Old 12-18-2013, 10:12 AM
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After you get the floats installed you should re CG your airplane with a foward CG preferable, to help the airplane fly better ( I think ) when you do this you add the ballast to the floats not the airplane so your land CG is right where you left it after you remove the floats.
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Old 12-18-2013, 10:19 AM
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I have a 4 star 60 that I fly on floats ( from Maxford USA.) I got used, it came with a OS LA 65 and that was enough to fly her no lack of thrust, the 4 star is an awesome float flyer, very stable a smooth, on both water and air.

Last edited by CARS II; 12-18-2013 at 10:22 AM.
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Old 12-18-2013, 10:37 AM
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Here is one of our float fly, here you can see a Cub on floats taking off, obviously not over powered.

Not working, just type Lake Hennesey float flying, should be the first video.

Last edited by CARS II; 12-18-2013 at 10:43 AM.
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Old 12-18-2013, 03:04 PM
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Thanks for the replys guys. I think I am going to look for a Christen Husky, it is a nice looking plane, they seem to be hard to find here in Canada so far tho.

Cheers
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Old 12-19-2013, 05:02 AM
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Keep checking Horizon's site. Maybe they will have another sale and/or free shipping coming up.
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Old 12-19-2013, 10:14 AM
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I think that a GMS 76 is a perfectly sized engine for great performance on a 40 sized plane with floats. In fact, all of the 40 sized planes that I had on floats flew on Tower 75s which is nearly identical to the GMS engine. On average, 40 sized floats will add around 2.5 - 3.5 lbs to your all up weight, so the extra power will allow you to have approximately the same reserve power as you would have with no floats and a 46 engine.
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Old 12-22-2013, 09:06 AM
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I think the seagull husky is a rebranded KMP Hunsky. I have the KMP Hunsky on floats powered with a Supertigre .75. It is a great combination. I had to make my own float mounts, but it came out pretty well. I think you will be real happy with the combination.
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Last edited by c550; 12-24-2013 at 08:12 AM.
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Old 12-24-2013, 07:34 AM
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I have a Aniversary cub with a GMS .75, A Seadancer with GMS .75 and a LT40 with a Tower .75 and the LT40 is my favorite float plane. These are all 40 size planes. Yes, you need more power with a float plane. The most difficult water to get off of is glass smooth, and that is where you need the power.
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Old 12-25-2013, 05:49 PM
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Thanks for all the input guys, after looking into it a bit and comparing the weight vs size of some of the ARF's available I decided to order a Pheonix Model Decathlon .46. I will be building the floats myself, planning on using high density foam with a layer of glass over it. Any input on the best design / material combination for floats?

Cheers and Merry Christmas
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