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[Patrick Henry]

Can anybody tell me what the advantages/disadvantages are regarding fitting two motors and shafts or fitting one motor and shaft to a 36" Perkasa, please?

Not looking for outright speed, just a decent scale speed and sensible running time.



Rich

[Shipmate60]

2 shafts give far more stability and manouverability.
On the plane you are looking for the stern area to support the weight of the model on turns so it is easier for the model to "fall over" and dig the shoulder in.
On twin screw the weight of the hull is supported by the hull and 2 props so give better stability.
With manouverability you can turn on the spot with 2 x ESC's.
With 2x shafts the motors can be lower powered than single shaft for the same performance.
Downside is 2 x motors, ESC's, shafts and props.

Bob

[Martin (Admin)]

An original Perkasa had three Proteus gas turbines engines and shafts so tow would be 'more' scale like.
two motor also give you more control when manoeuvring and a bit of redundancy if one motor, shaft or prop fails...

[Patrick Henry]

Bob and Martin, many thanks for those replies, can I ask one more question?

I see your valid points about installing twin motors and shafts, but why is it you very rarely see a model Spearfish/Huntsman/Swordsman/etc with two motors and shafts fitted? Or come to that, I've never seen an OMRA style boat fitted with twin shafts?



Rich

[Shipmate60]

Less weight more speed and a hull designed to run at high speed with a small wetted area.
The Perkassa has a full superstructure so the centre of gravity is that much higher plus the hull is not designed as a racing hull just a fast military craft.

Bob

[Patrick Henry]

Points taken, absorbed, and decisions made...two Action 550's, two shafts and two 35mm props will be installed after the F1 finishes.


Thanks Bob,


Rich

[irishcarguy]

Hi U33,  you can buy a P94 from Action & it will control both motors, talk to Dave he will fill you in I am sure , Mick B.