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Old 02-10-2008, 09:42 AM   #11
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You have done a great building and paint job here - the only thing that I like to do now is remind people to check their CG.

I have known a couple of guys that mounted floats and went flying - their balance was so messed up... well the plane didn't survive.

So... I don't mean to insult... I just remind people of the basics.

Happy Landings!
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...or nothing.
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Old 02-10-2008, 10:50 AM   #12
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[quote="bbbair"]You have done a great building and paint job here - the only thing that I like to do now is remind people to check their CG.

Whoops, damn near forgot that important little detail. Thanks bbbair


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Old 02-10-2008, 11:23 AM   #13
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Hey Curt, your Cub looks very good. I'm sure you won't over look any of the details before you fly it. As usual it will be set up perfect. Just remember to pull up you tx antena. I'm still hopeing to get my Lt 40 on floats yet before spring but my Fourstar is taking a little longer than I had hoped. Homelife and work come first.
I am going to miss our evening flying trips and b.s. sessions now that you are moving. Getting together on a nice evening for a little flying, was something that I really looked forward to. Several of my new planes will have to wait for their maiden until we get together this spring. I think my Chipmunk and Mustang could use the benefit of Imperials long runway.
I will see you Monday afternon.

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Old 02-10-2008, 08:39 PM   #14
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Travis you make sure to send me a PM when you get that Chippy in the air. I am betting you will enjoy that plane very much. And curt now that you have the cub on floats, you'll have to come down to the cabin with travis of course (Last Mountain Regional Park) and we can fly floats some weekend. also the 4th hole on the golf course opens up over a huge pasture and is a great runway. I have made a little progress on the Beaver and have ripped the old covering off and got the wings recovered. And got the covering for the fuse. It will be ready for the spring!!!!!


Proud owner of a Hitec A9!!

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Old 02-11-2008, 08:54 AM   #15
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Everyone's a critic and you asked for comments, so here goes, based on many years of float flying with high wings, low wings, 2 strokes, 4 strokes, gassers, on floats, flying boats, scale, sport, aerobatic, etc. etc.

You'll know if the foats are good or not once you try them. Some work great and others not so great. These look to be a bit disproportionately long behind the step compared to the length of the forward section. On full size, you'll generally find less difference, with the forward section quite often just a tad longer, except with Wipline where the forward section is much longer than the rear. It could just be the angle of the photo.

You can run with a wood prop on water. I've done it with the same prop on the plane for an entire season of flying every week. Mind you, if you do get any spray into it, the prop becomes a toothpick, immediately. Put on anything other than wood and forget about the possibility of losing your prop to water spray. Even on full size float planes with metal props, the spray causes considerable damage. Makes quite a noise when it hits the prop too.

No need to move the RX and battery off the floor. Your plane will flip over one day. And when a Cub flips, it sits with the nose submerged and right where you have the RX now will be under water. The floor will be well above the water and dry.

Make certain that your struts are rigid and there is no wobbling of the plane on the floats. It would help to put a diagonal brace between the front and rear struts.

Those wire spreaders between the floats look like they could wiggle up and down and sideways quite a bit. If they do, you will find that 1/4" aircraft ply spreaders about 1" wide will prevent any of that. With wiggly floats, you will have a very challenging take off run!

About the only full size plane that you will find that uses the wheel landing gear on floats is the Fleet Canuick 80. And a J-3 certainly does not. It also does not duplicate the LG fairing on the rear strut. It also sits higher off the top of the floats than it would off the ground on wheels. Additionally, the front strut is angled forward from the attachment on the fuselage. Minor stuff, I suppose. It just does not look like full size the way it is.

Full size planes also chuck the tailwheel when on floats. There's no need for it and it only gets in the way.

Some Cubs use a sub fin and some do not. My experience with the GP CUb on floats was that it behaves much better with a sub fin.

Balance is usually not an issue with a well designed set of floats. I've normally found that it's a simple matter of taking off the landing gear and mounting the floats, with no significant change in CG. Of course, this also requires proper location of the intended CG of the plane relative to the step of the floats.

Whatever you do, hook up both water rudders because it makes taxiing easier and don't forget to hold full up elevator when taxiing downwind or making a downwind turn. Otherwise, you'll wonder why you can't complete the task. Using ailerons in cross wind taxiing as on full size float planes helps too.

And get out there and fly it!
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Old 02-11-2008, 08:39 PM   #16
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Great information! Thanks for posting.

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Old 02-12-2008, 06:46 AM   #17
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DO335..... Lots of good info, thanks. I wasn't going for scale looks on the landing gear, just functionality and I plan on swapping from floats to wheels quite often so that is why I left the tailwheel on and used the original gear. You are right about the rx, only safe place is in a box on my shelf . I'll be putting a plastic prop on for water and use the woody for land. I definately have to support the floats better to keep the wobble out of them. Still some work to do.



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Old 02-12-2008, 02:56 PM   #18
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Sweet looking Cub my friend. If you've never flown with floats before, your in for a real treat. And really, nothing looks better than a Cub taking off and landing on the water!

Perhaps this pic will help you get some of the prespective DO335 is talking about!
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Stoney Creek Hawks RC
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Old 02-12-2008, 03:25 PM   #19
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Really looks nice Curt. I owned a 1/4 scale one on floats.Oh yea I lived on a lake for a year and it was my runway.Not sure if you are going to fly from shore or go out in the water on a boat. I had to do the boat as trees grew right to waters edge or enough so that you couldn't get a real clear view.So I will comment on what I learned, anchor your boat as the wind will change direction this will keep you pointed into the wind.This will also enable you to monitor the waves as they won't change direction as fast as the wind Always land into the wave otherwise it could grab your float and flip you over(when I talk waves this could be anything from a slight ripple up to a 2 or 3inch wave anything much bigger could well be a little rough to take off from.As John stated have floats parallel to slight toe in,but the biggest thing I found was make sure the STEP is exactly under the CG and they are also level to the main wing.Not down slightly or up slightly but dead level. The biggest reason for these two adjustments is I am sure you have heard guys say I couldn't take off it was this or that. Well it was those two I just stated. Step in wrong place and floats can't get up on STEP and leave the water behind almost like suction holding them down and if they are not dead level you have now changed the angle of attack on the wing and we all know what that will do .
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