How far apart are the sponsons supposed to be on the jae21??

[TomMoorehouse]

How far apart are the sponsons supposed to be on the jae21??

 

[CapeTown73]

Hi Tom,

I've just measured mine (built from a kit) and inside of sponson to inside of sponson is 17 and 3/4 inches..

Hope this helps.

Regards,

Wennie.

 

[TomMoorehouse]

Thanks!

 

[TomMoorehouse]

I was hoping 13 inches would be good. 48" tube divide by 3..... 16 inch tubes. 3 inches of sponson. 13 spacing. No good huh?

 

[MattMurany]

That would be good for a 12 but even the JAE 12 tubes are 16 inches in length, 14 inches from inside of sponsons.

 

[John Knight]

Tom,

Mine are 7" outside of sponson to outside of the tub. Runs well that way.

John

 

[Ted buckley]

I was hoping 13 inches would be good. 48" tube divide by 3..... 16 inch tubes. 3 inches of sponson. 13 spacing. No good huh?

I don't see anything wrong with this spacing... I run the full length on mine, but my son's are an 1" shorter and there is no noticeable difference in the two..

 

[Geraghty]

I was hoping 13 inches would be good. 48" tube divide by 3..... 16 inch tubes. 3 inches of sponson. 13 spacing. No good huh?

13" ain't near enough.................22" outside to outside is a real good number.......sponson width = stability in nasty water

 

[Ted buckley]

I was hoping 13 inches would be good. 48" tube divide by 3..... 16 inch tubes. 3 inches of sponson. 13 spacing. No good huh?

13" ain't near enough.................22" outside to outside is a real good number.......sponson width = stability in nasty water

Yep, your right.. Somehow the thread kinda shifted to .12 JAE and that's what I was talking about.

 

[Chris Wood]

the wider the better and i don't know if there is such a thing as to wide to this point

the only down fall to that is as the tubes get longer.. you have more flex ( i don't think that is all bad ) but bouy's eat up tubes out that wide.. so keep that in mind if you are a bouy monster driver

chris

 

[TomMoorehouse]

22 it will be then.... just hoped to utilize the tubes better. But performance comes first.

 

[TomMoorehouse]

That sure looks wide!

 

[Chris Wood]

you will be just fine tom

 

[Ted buckley]

I was just curious, but I don't see anymore talk about off-setting the Starboard(Right)sponson anymore(Bringing in). Nor do I see any talk of toeing-in an 1/8" of the front right(Starboard) sponson any more? I know that JAE talks about the toe-in portion for set-up(to off-set the tourque), but No talk of Off-setting? Has this practice been abandoned? Is the benefits nominal? :unsure: My Son uses the Toe-in on his JAE .21 and it works great..

 

[Geraghty]

I was just curious, but I don't see anymore talk about off-setting the Starboard(Right)sponson anymore(Bringing in). Nor do I see any talk of toeing-in an 1/8" of the front right(Starboard) sponson any more? I know that JAE talks about the toe-in portion for set-up(to off-set the tourque), but No talk of Off-setting? Has this practice been abandoned? Is the benefits nominal? :unsure: My Son uses the Toe-in on his JAE .21 and it works great..

#1.Off-setting does absolutely nothing ...........the JAE team has been all over that with negligible results......

#2.When the JAE initially went into production,some builders were experiencing prop walk and a boat that pulled to the right.....[we never experienced prop walk with the JAE proto-types]

Several people tried to weigh in with set-up techniques that were used on traditional rigger set-ups to minimize the prop walk they were experiencing.

A few JAE owners said toe-in worked well.......we found that a deeper rudder and work with the turn-fin was far more effective than toe-in.....but.....

once again it is obvious there are several ways to obtain the same end result.........

 

[John Knight]

I was just curious, but I don't see anymore talk about off-setting the Starboard(Right)sponson anymore(Bringing in). Nor do I see any talk of toeing-in an 1/8" of the front right(Starboard) sponson any more? I know that JAE talks about the toe-in portion for set-up(to off-set the tourque), but No talk of Off-setting? Has this practice been abandoned? Is the benefits nominal? :unsure: My Son uses the Toe-in on his JAE .21 and it works great..

#1.Off-setting does absolutely nothing ...........the JAE team has been all over that with negligible results......

#2.When the JAE initially went into production,some builders were experiencing prop walk and a boat that pulled to the right.....[we never experienced prop walk with the JAE proto-types]

Several people tried to weigh in with set-up techniques that were used on traditional rigger set-ups to minimize the prop walk they were experiencing.

A few JAE owners said toe-in worked well.......we found that a deeper rudder and work with the turn-fin was far more effective than toe-in.....but.....

once again it is obvious there are several ways to obtain the same end result.........

To add to Rod's comment under #2, I also had prop walk. Found out that using a reduced length rudder was causing it and when I put on a full length one, it stopped. In addition, the kit provided turn fin was too weak and it bent below the sponson. Had a 7075 one made and it bent too. Got a David Preusse one, which is profiled slighly different - more like a sport 20 fin - and I have not bent it. There are a lot of G forces on the fin, more than you think.

 

[Ted buckley]

I was just curious, but I don't see anymore talk about off-setting the Starboard(Right)sponson anymore(Bringing in). Nor do I see any talk of toeing-in an 1/8" of the front right(Starboard) sponson any more? I know that JAE talks about the toe-in portion for set-up(to off-set the tourque), but No talk of Off-setting? Has this practice been abandoned? Is the benefits nominal? :unsure: My Son uses the Toe-in on his JAE .21 and it works great..

#1.Off-setting does absolutely nothing ...........the JAE team has been all over that with negligible results......

#2.When the JAE initially went into production,some builders were experiencing prop walk and a boat that pulled to the right.....[we never experienced prop walk with the JAE proto-types]

Several people tried to weigh in with set-up techniques that were used on traditional rigger set-ups to minimize the prop walk they were experiencing.

A few JAE owners said toe-in worked well.......we found that a deeper rudder and work with the turn-fin was far more effective than toe-in.....but.....

once again it is obvious there are several ways to obtain the same end result.........

To add to Rod's comment under #2, I also had prop walk. Found out that using a reduced length rudder was causing it and when I put on a full length one, it stopped. In addition, the kit provided turn fin was too weak and it bent below the sponson. Had a 7075 one made and it bent too. Got a David Preusse one, which is profiled slighly different - more like a sport 20 fin - and I have not bent it. There are a lot of G forces on the fin, more than you think.

Hey, Thanks guys for the info.

 

[moparbarn]

someone out west was running a telemetry system (eric bourlet maybe?), said he had recorded 7+ G's on his jae in the turns....