discussion speed 700 bb 9.6 or 8.4 help....

[Guest]

hi all

what is he major difference between these to?

can someone tell me what is the best batt setup for these

they are powering kehrer 28mm jets...

cheers

M.I.B

 

[Guest]

MIB.

depends what power you require, twin waterjets eh. ?

Either will be power hungry, but if you look at the specs on the motor box it should tell you what power the motor should produce on each voltage.

I run a 900 BB Turbo single waterjet in a scratch built 1/16 PBR....and its ballistic !! mind you i run it on 14.4 volts!!!!!!!!! ( but its a 12v model ).

With water jets its all about torque rather than motor speed, so its what water the motor can force through the jet without slowing down and hence overheating...make sure you have some really good speedos in there, mine is rated at a constant 35 amps with a stall of over 75 Amps, the batteries tend to get a bit toasty,( good for keeping your hands warm on a cold day at the pond though.)

:regards: Sub.

 

[Guest]

speed 700

hi sub

how are ya mate??

the motors will be 700bb turbo,s 8.4 volt are these any good?

as i dont wont a speedboat just semi decent speed

its for skydiver so not a raceboat!! lol!

so what batts and esc would ya recommend mate??

cheers

mickeace:

 

[Guest]

Ahh I see,

They would do in that case, they are quite powerful so it will go a bit if needed, they do tend to get a bit warm, but thats when they are on full tilt, it would probably leap out of the water with these (depending on the size of course ) 8.4v will be ok a good speedo capable of at least 25 amps would be my guess, but you would have to measure the amperage when installed to make sure. My single 900 bb turbo draws about 25 amps

Think I have a pic of skydiver model somewhere, will try and dig it out .

8.4 volts would be ok

 

[Guest]

hi sub

thx mate so u think a bigger ecs is needed as i need 2 !!!!!!!!!!

would 2x 15a mtroniks be ok?

posted a couple of pics forgot how to pt pics which enlarge!!!!

mick