JAE mini sprint 109$

[regisparent]

now on zippkit.com for 109$
the kit

http://zippkits.com/~zippkits/index.php?main_page=product_info&cPath=71&products_id=263

[Brushless55]

Kick ass!

now who can build them for those who don't have the time to build

[siberianhusky]

Mine is already part way done!

[Brushless55]

Being this one is small, maybe I do have the time to build it!

[martin]

On the type of flex shaft & stuffing tube used in this design does the stub shaft just run in the brass outer tube & the flex in the teflon liner. Does the dog run against the stuffing tube end or is the end load taken against the motor bearings. Thanks Martin.

[Joe Petro]

The prototype used a teflon liner and a thrust washer at the "strut".

The production kits will use no liner, and the motor bearings will take the thrust.
We are working on a stub shaft design that runs directly inside the shaft tube...

Joe

[martin]

The prototype used a teflon liner and a thrust washer at the "strut".

The production kits will use no liner, and the motor bearings will take the thrust.
We are working on a stub shaft design that runs directly inside the shaft tube...

Joe

Joe is their any reason other than possible extra cost that your not using one of your 12 size Z struts. Thanks Martin.

[geraghty]

Joe is their any reason other than possible extra cost that your not using one of your 12 size Z struts. Thanks Martin.

I can answer this.....The stuffing box design decision had absolutely nothing to do with the cost........you just plain and simple do not need a strut cluttering up the transom of this boat......
The JAE design team tested the hell out of this system and it is bulletproof and a strut it is just simply not needed......If reliability was in question,.the JAE design team would never have recommended this system.....
The JAE team is dedicated to lowering the cost of model boating ,but never at the expense of a successful day at the lake.
If you are absolutely convinced you need more support,just take the next size up brass tubing and loctite it over the last couple inches of the stuffing box where it exits the ski.Do this before you cap off the rear of the ski and then seal the tub with it the 5 minute epoxy from the inside.
I will say this again......
The JAE team is dedicated to lowering the cost of model boating ,but never at the expense of a successful day at the lake running a JAE design.

[martin]

I can answer this.....The stuffing box design decision had absolutely nothing to do with the cost........you just plain and simple do not need a strut cluttering up the transom of this boat......
The JAE design team tested the hell out of this system and it is bulletproof and a strut it is just simply not needed......If reliability was in question,.the JAE design team would never have recommended this system.....
The JAE team is dedicated to lowering the cost of model boating ,but never at the expense of a successful day at the lake.
If you are absolutely convinced you need more support,just take the next size up brass tubing and loctite it over the last couple inches of the stuffing box where it exits the ski.Do this before you cap off the rear of the ski and then seal the tub with it the 5 minute epoxy from the inside.
I will say this again......
The JAE team is dedicated to lowering the cost of model boating ,but never at the expense of a successful day at the lake running a JAE design.

Thanks for reply, Also would you use a washer to take the thrust against the stuffing tube or against the motor bearings as planed. Cant wait to get one of these boats & have some fun with it. Thanks Martin.

[geraghty]

Thanks for reply, Also would you use a washer to take the thrust against the stuffing tube or against the motor bearings as planed. Cant wait to get one of these boats & have some fun with it. Thanks Martin.





Martin,
That will not work unless you have some sort of slip joint [I.E. a square drive coupler] in the driveline system and then......... you would also need to design someway to retain the driveline system in the boat to keep it from sliding out the back of the boat when you let off the throttle....
Taking the thrust at the motor bearings will be no problem whatsoever....
In fact when you install the driveline keep a 1/16" gap in between the drivedog face and the end of the stuffing box/stub shaft bushing assembly.

Rod Geraghty

[Brushless55]

does the kit come with a esc?
thanks

[Joe Petro]

No.
No electronics are included. Every other part or piece needed is included though.

We will have servos and ESC's available for them soon.

Joe

[Brushless55]

No.
No electronics are included. Every other part or piece needed is included though.

We will have servos and ESC's available for them soon.

Joe

ok
and these are ready now?
I think someone said they may have these prebuilt?

[martin]

Thanks Rod, Yes thats how i run my mini monos with the load against the motor bearings on outrunner motors running at 42,000rpm unloaded with no problems at all. Thanks Martin.

[Alexgar]

when will they be realeased?