JAE TWIN PLANS !!!!!!!!!!!!!

[Rick Pirrone]

hi all

just woundering if anybody knows if there are plans for a twin jae available as yet

or do i have to modify the 45g plans to suit ??????

cheers rick

 

[Paul Traufler]

You could start with the JAE 101 plans, would be about the right size only needs to be wider really.

Paul

 

[ALLAN YUEN]

I talked David Hall about Jae twin at hobart so he will may build on project special JAE Twin in winter . Will be surprise to show in someday.

 

[Mike Siriani]

I have one almost finished be ready for spring

 

[aaron alberico]

You could start with the JAE 101 plans, would be about the right size only needs to be wider really.

Paul

There is no way the 101 boat is big enough!!!

Not even for a single!

Regards Aaron

 

[Blackout]

All this advise and we don't even know what size of engines he is planning to use....

 

[dr gary turner]

You could start with the JAE 101 plans, would be about the right size only needs to be wider really.

Paul

There is no way the 101 boat is big enough!!!

Not even for a single!

Regards Aaron

I have a 101 JAE and its Sister has been shipped to Australia. The size is just fine. The turn fin is the challenge. Doc

 

[aaron alberico]

All this advise and we don't even know what size of engines he is planning to use....

I know because he is in my club!!!!!!

 

[Rick Pirrone]

hi guys

greg i will be running 91 vac,s i agree with Aaron the tub is not long enough at only 36.75 i feel it will have to be longer

i have the plans printed for the 91/101 my idea was to increase these to suit the length i am after as well as the width also

let the building begin

cheers rick

 

[Rick Pirrone]

I have one almost finished be ready for spring

you have a pm

 

[dwilfong]

Spend some time on the sponson design. Thy like to trip up in race water.To narrow and cut into the wakes in the corner.

Need anti trip angles on the sponsons. The smaller boats are fine nice and lite and say on top in lite chop. but get a big one in big race water and it is a whole different beast.

David

 

[Geraghty]

Spend some time on the sponson design. Thy like to trip up in race water.To narrow and cut into the wakes in the corner.

Need anti trip angles on the sponsons. The smaller boats are fine nice and lite and say on top in lite chop. but get a big one in big race water and it is a whole different beast.

David

There is some truth to what you have said......but what you have deduced as to the cause of the tripping problem is not correct......so called non-trip angles have nothing to do with JAE's tripping......

If a JAE slides or comes un-hooked in the corner,the boat will trip.......It is as simple as that.........The heavier the boat the more turn fin that is required to maintain control.......

If a JAE trips [pole vaults] in the corner it is because the turn fin just flat ain't doin' its job.........

The JAE team has not put any effort into designing a twin but the .90-1.01 boat would be a good start........everything is there for success except a good turn-fin and rudder marriage.....

Both the rudder depth and turn-fin design have to be right...........

All JAE's use sound hydro-dynamic principles [Flat Plane Technology] ......That is what keeps a JAE on top of the water as light as a water bug running characteristics.......

 

[Don Ferrette]

Spend some time on the sponson design. Thy like to trip up in race water.To narrow and cut into the wakes in the corner.

Need anti trip angles on the sponsons. The smaller boats are fine nice and lite and say on top in lite chop. but get a big one in big race water and it is a whole different beast.

David

There is some truth to what you have said......but what you have deduced as to the cause of the tripping problem is not correct......so called non-trip angles have nothing to do with JAE's tripping......

Rod please expain then what the boat is actually "tripping" on if it's not the 90 degree vertical sides. I have run many hydros over the years and have seen how angled non trip sponsons "slide" from "inadequate" turn fins. With that being said the one thing I have seen with the JAE's is they do not slide, if the turn fin is not right they roll over, period. Not at all trying to be confrontational but rather have an answer when I get asked the same questions by others. :blink:

 

[Buckshot]

All JAE's use sound hydro-dynamic principles [Flat Plane Technology] ......That is what keeps a JAE on top of the water as light as a water bug running characteristics.......

Please enlighten us on "Flat Plane Techology".

 

[Ron Zaker Jr]

Spend some time on the sponson design. Thy like to trip up in race water.To narrow and cut into the wakes in the corner.

Need anti trip angles on the sponsons. The smaller boats are fine nice and lite and say on top in lite chop. but get a big one in big race water and it is a whole different beast.

David

There is some truth to what you have said......but what you have deduced as to the cause of the tripping problem is not correct......so called non-trip angles have nothing to do with JAE's tripping......

Rod please expain then what the boat is actually "tripping" on if it's not the 90 degree vertical sides. I have run many hydros over the years and have seen how angled non trip sponsons "slide" from "inadequate" turn fins. With that being said the one thing I have seen with the JAE's is they do not slide, if the turn fin is not right they roll over, period. Not at all trying to be confrontational but rather have an answer when I get asked the same questions by others. :blink:

Hi Don,Buckshot,

I can tell you from the earliest days of testing with the Jae's a "non-trip angle"on the sponson has nothing to do with our boat tripping. In multiple back to back to back tests (too many to even count) we found that it IS the fin and rudder relationship. Someone had a video of my early JAE 20 boat that showed it launching in a turn at Evansville (good 15 feet in the air). We reviewed and reviewed that vid and really saw the fin then the rudder letting go. We built some test sponsons with the "non tripp angle" (outside sponson) and the boats were still launching in the turn and somewhat "sliding " as mentioned. With proper fin and rudder relationship our boats now turn like a slot car.(zero slide allowing zero trip) It was not until we adjusted on the fin(bigger,deeper,shape, etc) and found a good rudder depth that we solved the launching or tripping as is used to be called.Hope that helps.

 

[Buckshot]

Ron,

I can understand what your saying about bigger/deeper/shapelier turn fins and rudders, went through a similar issue recently.

What is "flat plane technology"?

 

[Ron Zaker Jr]

Ron,

I can understand what your saying about bigger/deeper/shapelier turn fins and rudders, went through a similar issue recently.

What is "flat plane technology"?

Hi Buckshot,that is a phrase that Zipp kits started. Meaning the sponsons,and tub bottom are flat with no sweep or belly.

 

[dwilfong]

I can only talk about what I have seen in a recent race. so please bear with me not trying to start some thing.

The boat would run like a slot car hooked up real nice and turn in side any boat on the course but when the water got messy it would TRIP over its self in the corners every time.

I am not a boat designer in any way. Just know what I have see with my own eyes.

Don't know what needs to be done but it is a real problem. Just putting it out there for those of you that care to here.

It would be nice to figure it out. would make for a real fast boat.

I have one in mind if it all gets sorted out.

Have enough problems chasing the eng set up no time to chase a boat right now.

David

 

[Buckshot]

Ron,

Thanks for the info.

 

[Geraghty]

Ron,

I can understand what your saying about bigger/deeper/shapelier turn fins and rudders, went through a similar issue recently.

What is "flat plane technology"?

Hi Buckshot,that is a phrase that Zipp kits started. Meaning the sponsons,and tub bottom are flat with no sweep or belly.

Any curved surface that comes in contact with the water moving across that waters surface will experience The Bernoulli effect and Coanda water attachment which will result in an erratic sucking down of that curved surface to the water....

Flat surfaces contacting the water do not have the water attach with Bernoulli/Coanda and suck down the running surface to the water....This is why JAE's ride so very light on the water......

Flat surfaces are "always" trying to push the boat up on top of the water.....curved surfaces are "always" trying to suck the boat down into the waters surface.....

Dead Flat planes are what allow JAE's to have no adjustments necessary to the AOA of running sponson surfaces and the tub bottom.....

Actually David Hall came up with the term "Flat Plane Technology".........[Pretty smart fella that David Hall guy.... B) ]

http://en.wikipedia....nd%C4%83_effect

There are several videos on You Tube demonstrating Bernoulli and Coanda..... http://www.youtube.com/watch?v=AvLwqRCbGKY