JAE FE with SuperVee 27 or ProBoat powered?

[Tim Strange]

After successfully completing my Nova Rossi powered JAE 12, I want to build a larger version...Looking at the JAE 21 nitro and FE. Although there doesn't seem to be much interest locally (IMPBA Dist14) in FE, I am tempted to go with the Jae FE for the drop and go qualities of FE...and I have some parts on hand that may work.

Namely, I have the SuperVee 27 1800 kV motor and ESC and The ProBoat Miss Elam Motor (1500 kV?) and ESC. It looks like the go to motor/ESC (2030 kV?) are the UL-1 parts. Just wondering if, with the motors and ESC's on hand, I can make a competitive combination. Perhaps by using a larger higher pitched prop?

Tim

 

[Grimracer]

Tim

I will bring my P spec to the race in a few weeks.. come on over and we can chat options

Grim

 

[Tim Strange]

Grim, I'll certainly stop by to check it out!

I suppose I need to do more research on the P-Spec class...haven't really seen much info...that's for another post I suppose =)

 

[Darin Jordan]

Grim, I'll certainly stop by to check it out!

I suppose I need to do more research on the P-Spec class...haven't really seen much info...that's for another post I suppose =)

Tim,

I tried to make a competitive Raptor P-Spec Hydro using a BJ26 motor (actually 1650KV or so, not 1500...) and, while that motor has TONS of torque, with these 30-ish inch hulls, you need to run too much prop to use it, and the handling goes to hell.

MAYBE, if you built a full 34" sized boat, you could swing enough prop to make it work, but for the 21-sized hull, which is what Eric Bourlet is running, the UL-1 motor is the motor to have for the spec classes...

Lohring Miller radar'd Eric's boat at 63-64mph this weekend while heat racing... which is WAY faster than we even imagined these boats going when we first started this adventure!

Get with Mike... he'll get you on the right path.

 

[Tim Strange]

Darin, which hull is Eric running?

I will say that I know for a fact that the Proboat and SV-27 hulls are way too small for top speed and heat racing. For what it's worth, The JAE is 31.5" long.

 

[Darin Jordan]

Tim,

Eric is running a JAE 21 FE...

You have to trust me... That's not big enough a hull for a BJ or SV motor... Figure that the UL-1 will need to spin at least an ABC H-10 prop or a pitched up H-4 to be competitive... The hull works well with that power system and a 45-47mm prop with 3.6 to 3.8" of pitch. You'll need to run a lot more pitch to make it competitive with a BJ or SV motor, spinning at least 20% less RPM.

I think it CAN be done, but you'll need a boat that will handle with that much prop. 34" is the max length for a P-class hull... I think it CAN be done, but not in like hulls... you'll need something that likes a LOT of pitch and maybe even more diameter.

All that being said... you MIGHT be able to pull it off with the 1800KV motor, but again, you'll need to be able to pull more prop. Might want to scale up those plans to the full 34" to give yourself the best shot.

 

[Eric Bourlet]

Tim,

Eric is running a JAE 21 FE...

You have to trust me... That's not big enough a hull for a BJ or SV motor... Figure that the UL-1 will need to spin at least an ABC H-10 prop or a pitched up H-4 to be competitive... The hull works well with that power system and a 45-47mm prop with 3.6 to 3.8" of pitch. You'll need to run a lot more pitch to make it competitive with a BJ or SV motor, spinning at least 20% less RPM.

I think it CAN be done, but you'll need a boat that will handle with that much prop. 34" is the max length for a P-class hull... I think it CAN be done, but not in like hulls... you'll need something that likes a LOT of pitch and maybe even more diameter.

All that being said... you MIGHT be able to pull it off with the 1800KV motor, but again, you'll need to be able to pull more prop. Might want to scale up those plans to the full 34" to give yourself the best shot.

If you look here JAE Photos you can see how I set my boat up. I built mine from the plans Rod G. sent me. I have found with much help from Brian "Snowman" ,Mike Hughes, Mark Anderson, and Darin that finding the right prop is key. Many props while they are capable of pushing the boat fast enough or possibly faster are very difficult to drive in a heat with other boats and feel confident that you will not foul someone. While I have not tried the SV motor I have seen people that have and like Darin said they just require too much prop to be drivable around other boats in a hull the size of the JAE. I would suggest you save yourself $100s of dollars of grief and spend the $60 to get a UL-1 motor. BTW Darin were all you guys keeping the MPH a secret ? I didn't realize that with Brian's prop Lohring got a reading.

 

[Darin Jordan]

BTW Darin were all you guys keeping the MPH a secret ? I didn't realize that with Brian's prop Lohring got a reading.

That's funny! I didn't know they hadn't told you! I should have kept my mouth shut!!

 

[jayt]

Lohring Miller radar'd Eric's boat at 63-64mph this weekend while heat racing... which is WAY faster than we even imagined these boats going when we first started this adventure!

When our club started running the UL-1 setups last year we were seeing 52-53 mph on the GPS in oval races with our better full-bodied LSH hydros running "X" series props. A decent rigger with a dedicated prop should be 15-20% faster than a comparable sport hydro. It is still amazing that the inexpensive, reliable AquaCraft motor/ESC combo would give these speed results.

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