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[Perks842]

Hello all, Whats the best set up to convert power from one motor to two prop shafts? and where can these set ups be purchased from?

Thanks, Dan

[Shipmate60]

Can you supply a bit more information about the boat you want to fit it in.
With your username is it a Perkassa? If it is there have been several of these made on here, you might try the search facility.

Bob

[hopeitfloats]

as bob says possibly a bit more information required but on my container ship i used belt drives which seems to work well enough and is reasonably simple to do and quiet running.

[mersey dave]

as bob says possibly a bit more information required but on my container ship i used belt drives which seems to work well enough and is reasonably simple to do and quiet running.

I have never seen this setup, sounds very interesting would it be possible to add some photo's please.

Kind regards Dave.

[Perks842]

Was thinking of powering my fletcher class destroyer by 1 motor to save weight and power consumption really, was hoping it wasn't such a rare thing

[Perks842]

Can you supply a bit more information about the boat you want to fit it in.
With your username is it a Perkassa? If it is there have been several of these made on here, you might try the search facility.

Bob

O and no idea on the Perkassa route there

[Shipmate60]

Perks,
What props are you going to use as the Fletcher kit comes with handed props.
You will need to reverse the rotation of 1 shaft by including 1 extra cog on 1 side only.

A simpler way is to use pulleys on the motor and both shafts.
These can be sized to use neoprene "O" rings to transmit the power.
To reverse 1 shaft fit a slighter larger diameter "O" ring but used in a figure of 8 with the other straight.

Bob

[Perks842]

Perks,
What props are you going to use as the Fletcher kit comes with handed props.
You will need to reverse the rotation of 1 shaft by including 1 extra cog on 1 side only.

A simpler way is to use pulleys on the motor and both shafts.
These can be sized to use neoprene "O" rings to transmit the power.
To reverse 1 shaft fit a slighter larger diameter "O" ring but used in a figure of 8 with the other straight.

Bob

Thats what I had in mind with the belts, was just hoping there might be some sort of little chassis for it or frame work.

[DieselDo]

Some plastic kits do have metal gearboxes, the 1/200 scale Yamato has 4 shaft output.
But these gearboxes tend to be very noisy and you would be lucky to find a box with the exact propshaft width.

[Shipmate60]

If you look on here in the Gallery you will see Dave Farrows installation in his Fletcher.

http://www.marksmodelbits.com/

Bob

[Perks842]

Thanks Bob, have already taken a look but like I said, wanted to safe power consumption and weight if the second motor.

[Shipmate60]

1 problem using 1 motor is that it has to overcome the frictional losses in the gearbox too.
Another way is to fit the motor to 1 shaft and fit 2 identical pulleys and use 1 shaft to power the other with the "O" ring in a figure of 8.
This way ensures you always have drive to 1 shaft.

Bob

[RaaArtyGunner]

If you look on here in the Gallery you will see Dave Farrows installation in his Fletcher.

http://www.marksmodelbits.com/

Bob

Bob, Nice installation,any ideas how or if the Fletcher images can be saved.

[Shipmate60]

Ask Mark.
Dave has used exposed shafts and the kit props.

Bob

[RaaArtyGunner]

Thank you

[nick_75au]

I would go with two motors, small with low rpm output, will be more efficient than a single motor driving two props,  its the prop causing the amp draw not the motor.

GWS IPS DX2 Motor & Gearbox, about halfway down the page

http://www.micronradiocontrol.co.uk/motor_brushed.html

Will draw minimal current, I've run these on solar cells and 30 mm props. but I also use 3 of the motors by themselves in a 1/72 Snell boot for rocket ship speed

Nick

[Perks842]

thread no longer requires, thanks all

[hopeitfloats]

I have never seen this setup, sounds very interesting would it be possible to add some photo's please.

Kind regards Dave.

hopefully the resized picture will load. this is the unit. i have tidied it up a bit by replaced the second hand brass hex and a few other  imperfections since this photo. probably made it more complicated by using ball races from a R/C car and its certainly over engineered but i prefer it that way.

[hopeitfloats]

maybe a slightly better photo. to give an idea of size, the motor is from a teleprinter (not the prettiest looking but incredibly powerful and quiet)  is approx 45mm dia. x 100mm long. runs 2 x 40mm 3 blade props with virtually no increase in current draw from no load to full load.