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wot4 on floats

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oldgit17/03/2018 16:26:18
453 forum posts
9 photos

hi

do the position of these floats look about right ?

20180317_161714.jpg

Don Fry17/03/2018 16:51:48
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2259 forum posts
29 photos

First impression, move the float back, two to three centimetres.

Don Fry17/03/2018 17:18:23
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2259 forum posts
29 photos

Second impression, try it as it is.

Mike T17/03/2018 17:27:43
308 forum posts
25 photos

Your step looks to be vertically under the 'kink' in the lower fus., which is where mine is. Compare and contrast:

w42.jpg

w43.jpg

Tried and tested...

 

PS - works superbly on snow too!

Edited By Mike T on 17/03/2018 17:28:41

Ace17/03/2018 17:41:51
163 forum posts
14 photos

As a starting point I believe the step is usually under the C O G or 10mm behind .This enables it to get up on the step and rotate. But as Don suggested - try it.

Don Fry17/03/2018 19:12:04
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2259 forum posts
29 photos

A black art.

But a float plane lifts exactly like a trike. No interesting moments.

Edited By Don Fry on 17/03/2018 19:12:35

Percy Verance18/03/2018 18:02:29
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6263 forum posts
110 photos

Ace has it spot on, the step is normally on or just behind the C of G. You should also have approximately the amount of float projecting beoynd the prop arc to correspond with half the size of the prop you're using, if you get my drift (no pun intended) ie: a 12 inch dia prop would have 6 inches of float projecting beyond the prop arc. If you don't have enough, the floats might attempt to submarine when the throttle is opened. 

As I'm sure Mike T will verify, the landing procedure is slightly different with a floatplane in that the final descent is slightly faster than flying from land, and you actually fly onto the water. Try to slow down too much and the nose of the floats could dig into a ripple when you touch down and over you go..... ideally, the floats need to plane on touchdown.

It adds another dimension to model flying though, and it's well worth having a go yes

And yes, on second thoughts I'd try it as it is Oldgit. If it needs adjusting, I don't think it'll be much.

 

 

 

Edited By Percy Verance on 18/03/2018 18:11:00

Don Fry18/03/2018 19:35:13
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2259 forum posts
29 photos

Not too sure about that touchdown procedure Percy. A flat high speed touchdown, produced a float tip close to the top of a ripple. A slow flop, is a slow flop. A normal trike like touchdown works fine.

Percy Verance18/03/2018 21:19:59
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6263 forum posts
110 photos

Worked ok for me Don. I've not flown from water for a while now - I was a Windermere Waterplanes member a few years back. I did most of my flying in a relatively secluded bay, which had several benefits. The water was somewhat calmer than the rest of the lake, plus there was virtually no boat traffic. The Irvine .61 powered ARC Cessna I flew at the time was a fairly weighty model, and consequently flew a bit faster than does the average smaller/lighter model. I fully appreciate that different models may require a different approach on landing. A smallish foamie for example is never going to land quickly.

 

Edited By Percy Verance on 18/03/2018 21:23:18

oldgit23/03/2018 10:46:45
453 forum posts
9 photos

Mmmm - had a test flight !! - looks like these blue foam floats are too heavy @ 530g compare to a white foam set @ 170g that I have (albeit a 100mm shorter), flight was very erratic.

Nick Cripps23/03/2018 15:46:55
36 forum posts
16 photos

More likely that the floats have moved the cg back a bit, a common problem when converting a land plane.

I would advise that you balance the model at the most forward point recommended in the instructions as a starting point. Ideally, add any required weight to the nose of the floats so that when you convert back to wheels you don't have to remember to take the weight out again.

The Wot 4 should cope ok with the extra weight, though. It may stall at a slightly higher speed but it won't be a problem so long as you are aware of it.

Having said that, if you have the opportunity to reduce the weight then that's good, too!

Mowerman24/03/2018 16:14:31
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1493 forum posts
103 photos

Some years back I was a member of the Reading club and they had float plane flying events some members Wot 4s on floats. The floats were made from eps by one of the members then skinned with thin ply. All flew well. I believe the same floats were used for Puppeteers.

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