How To Stop Sponson Walking

[TLeyde]

I have a UL 1 running a M445, have an air dam. At full throttle going down the straight guessing speeds of 50mph. It loves to do a sponson walk. How do I settle this thing down so I can keep the speed up?

TL

[detox]

Its called chinewalk. I witnessed the same condition using the m445 prop and UL-1 hull, but never ran it enough to remidy situation

[LarrysDrifter]

Cut holes where the batteries go and slip the batteries halfway into the sponsons.

[TLeyde]

I have cut into.the sponsons and 3/4 of the batteries are in the sponsons at the front most part of the hull.

[LarrysDrifter]

Well, I got nothing.... Thats how I stopped mine from walking and it worked. Good luck to ya.

[srislash]

My Miss Bud is doing this as well,it'll be fine but hits a chop and a walking she will go.My first hydro so I plugging in to this.

[lenny]

Try a different prop and see if it helps,
I am using a x642 on my Hydro and it run pretty good with that.
I have not pushed the setup yet, But speeds of 42 mph so far on 4s.
https://forums.offshoreelectrics.com/...Hydro-for-sale

[TLeyde]

Thanks for the tips guys. But I did what Larry said and I won't go backwards in speed Lenny. I've tried many props as follows M445, 40-52, 42-55, and 38-55.

TL

[lenny]

Hey,
What motor do you have in it and kv ?
Mine is a feigeo(sp) 10xl 1734kv on 4s,
The guy that had the Hydro made said that it should handle some bigger props.
I just have not tried anything bigger on it yet.

[TLeyde]

I know its weird, but I have the Pro Boat 1800KV motor in it with a Turnigy 120 esc.

TL

[lenny]

I think I may try propping up,
Your boat is 27"long by 14 1/4 wide and my boat is 24"long and 12" wide, 9"at sponsons.

[TLeyde]

I think I may try propping up,
Your boat is 27"long by 14 1/4 wide and my boat is 24"long and 12" wide, 9"at sponsons.

Try a 42-55

TL

[TLeyde]

Its called chinewalk. I witnessed the same condition using the m445 prop and UL-1 hull, but never ran it enough to remidy situation

It's not called "chinwalk", it's a hydro not a mono. Hydros have nonstops.


TL

[photohoward1]

Give it up. That's what UL1's do when they hit that speed. No prop on earth will fix it.

[mtbenjamin77]

Give it up. That's what UL1's do when they hit that speed. No prop on earth will fix it.

+1

You would have to modify the bottom of the sponsons to get rid of it. you need to add a step similiat to the PT supersport hydros

[TLeyde]

Give it up. That's what UL1's do when they hit that speed. No prop on earth will fix it.

I'm a nitro guy getting into some FE. Looks like I'll just get the PT Stealth all rigged to go then. I was unaware of this never had these issues with my PT SP 21 nitro.

TL

[mtbenjamin77]

I'm a nitro guy getting into some FE. Looks like I'll just get the PT Stealth all rigged to go then. I was unaware of this never had these issues with my PT SP 21 nitro.

TL

you might be able to get it to settle some with a high lift prop. Octura 14 or 16 series. Post a picture of your air dam as that could be the cause. It may work great at 45 but the additional forces at 50 may be causing the airdam to lose effectiveness

[slyman]

Try adjusting your strut height one way or the other by about 1/8 of an inch. Your transom height should be around an inch
when sitting flat on a table.

[rc2266]

The battery mod works great, I even ditched the airdam, was stable at 58, too bad I sold it, I miss that boat

[Pete32200]

I have done the Battery mod, air dam, sharpened rudder and installed a Prather B220 prop with the strut set at 1" on mine and it is pretty stable

[properchopper]

The UL-1 was made with a lot of AoA to keep it loose and fast with the stock rtr setup. Power or prop it up and it does the dance.
Decrease the AoA and she'll settle down

http://www.youtube.com/watch?v=yicE1_TfDDY

DSC03695.JPGDSC03697.JPG

[LOVE6S]

The UL-1 was made with a lot of AoA to keep it loose and fast with the stock rtr setup. Power or prop it up and it does the dance.
Decrease the AoA and she'll settle down

http://www.youtube.com/watch?v=yicE1_TfDDY

DSC03695.JPGDSC03697.JPG

Could you explain what AoA is please, thanks Shawn.

[properchopper]

Could you explain what AoA is please, thanks Shawn.

Angle Of Attack - the angle between the sponson and the water's surface

[LOVE6S]

Angle Of Attack - the angle between the sponson and the water's surface

Ahhh, thanks.