Twin out-board cat discussion

[K.R.Joye]

Thing is you can run big props with outrunners, I would say maybe up to a 450 with 4025/1100s. You maybe be ok with .150 cable considering you will probably be running count/rotating motors with 447R&Ls.

A 40" Cat hull should handle the 2P weight, besides you will need the ballast to keep from flipping backwards on starts.

[F1 madness]

Thanks bud,so you reckon go with the 1100 kv on 6s,should be able to modify the out boards for 3/16 flexis.
Also what do you reckon to the overall size.

[K.R.Joye]

I think outrunners would do great on O/Bs.They are so hard to cool(properly) inside a boat Couple of things, i would suggest using counter rotating motors just to offset the torque moment givin off by the outrunners also run 3/16 cables. Last, your going to need some good 150-200 amp ESCs, meaning don't go with Hi-Models. Etti 150s should do the job for 6S. Keep us posted!

[F1 madness]

most of my good ideas are in the off topic section (skippies and kiwis)
check the last 3-4 pages youll see what i mean

ill have a butchers now

[F1 madness]

i havent looked at the big scorps for awhile couldnt remember.
i remember that blue cat,still got pics on my computer of it.
mite be worth sending the guy a pm

might do that actually,see your full of bright ideas

[ozzie-crawl]

for got to add he is a member on here and knows his stuff

[ozzie-crawl]

i havent looked at the big scorps for awhile couldnt remember.
i remember that blue cat,still got pics on my computer of it.
mite be worth sending the guy a pm

[F1 madness]

first of dont listen to my dribble,its a lot safer
i tend towards high volts lower amps if it can be done. just check that the scorpion motors in the larger sizes bolt patten will fit the standard adapter on the lower leg (25mm) also the motor shaft needs to be 5mm i think as the square ended flex couplers are for 5mm shafts
i would look at twin cats around the same size and see what power there using
as in watts,shoot for some thing similar.
i think 6s with twins would be nice,hopefully doby mite chime in as i think he had a fair size scorpion in a cat,he may have more idea on there power out put and if a out board would handle the power

Already checked bud: 5mm shaft,25mm hole spacing,thats why i chose these

http://www.scorpionsystem.com/files/i1,199_full_dimension.pdf

I have looked at a couple,but most seem to run singles,but did find this

http://www.rcgroups.com/forums/showthread.php?t=1043673

[ozzie-crawl]

first of dont listen to my dribble,its a lot safer
i tend towards high volts lower amps if it can be done. just check that the scorpion motors in the larger sizes bolt patten will fit the standard adapter on the lower leg (25mm) also the motor shaft needs to be 5mm i think as the square ended flex couplers are for 5mm shafts
i would look at twin cats around the same size and see what power there using
as in watts,shoot for some thing similar.
i think 6s with twins would be nice,hopefully doby mite chime in as i think he had a fair size scorpion in a cat,he may have more idea on there power out put and if a out board would handle the power

[F1 madness]

yea out runners are great on tunnels,bit of a spray with wd40 at the end of the day to flush them out and there done

sorted,which option do you think would be best buddy,you always give sound advice and i trust you

[ozzie-crawl]

yea out runners are great on tunnels,bit of a spray with wd40 at the end of the day to flush them out and there done

[F1 madness]

Cheers bud,but will be running outrunners,i know a couple others who run outrunners on outboards with no trouble.

[j.m.]

Outrunners would be better since they would shed any water more easily than an inrunner trapping the water inside the can.

[steveo]

might want to use inrunner motors because of the wet location

[F1 madness]

hey daz,have you looked at the REK lowers,not as nice looking as the OS but composite so both would probably weigh less than one OS, probably cost less to buy 2 reks than one os as well.
just a thought as there would be a lot of weight in the a$$ end
lol just looked at the size 40", should be ok with that power having a bit of weight,check prop size as most legs are limited to prop with the cav plate on

Alrite bud
i have looked at the rek legs,but with the size of the hull and weight,just thought they be abit stronger.
im either not gonna run cav plate or will make a spacer for it as it screws on so not to worried about that part.
i will also install water pick ups in the sponsons,so wont matter if i run with or without