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[cbr900]

I just aquired two motors with gearboxes, one is a Hectoperm and the other is a Decoperm, both are new never been turned over as yet, can anyone suggest a use for these two motors as I have not had either before, and keep it clean gents.........


Roy

[Peterm]

Hi.   I used a decaperm with gearbox in a 4foot, scratch-built narrowboat.   It was ideal because the gearbox lowered the level of the drive to the horizontal level necessary.   Pete M

[cbr900]

Would either of these motors be suitable for a Tug turning a rather large prop.........


Roy

[norry]

The best job for them is in a tug...I use them all the time for my tug-towing tugs...
What size of tug do you have in mind...?

...Best Regards...Norry...

[malcolmfrary]

Anything like the stuff on the end of this link?
http://johnson.manowar.e-pro.de/index.php?IdTreeGroup=49&IdProduct=476

[portside II]

Ouch have you seen the drain on that motor no wonder you boys dont like them johnson motors much .
Max. current @ no load 2.017 A
@ stall 101.61 A
@ max. efficiency 14.315 A
@ max. power 51.813 A 
Damn that would make my esc smell funny right up to the moment it went bang!! ???

[Bunkerbarge]

I have a 12v hectaperm and gearbox unit in my Envoy class and it moves the model along at a higher than scale speed but remains very responsive and manoeuvreable.  It also lasts well over an hour and a half with a motorcycle battery so I am very pleased with the set up.

[john webster]

These are both regarded as rhe "Rolls Royce" of motors, cant beat them. I've used a Hectaperm on my large trawler now for about twenty years and no problems apart from motor casing getting a bit rusty.Incidently i'm using a six volt rated motor on 12 volts and running through a six to one gearbox.

[cbr900]

Norry,
I was intending to use the motors in a tug that is 48" long, as I have a fibreglass mould for the hull, I have made one already with twin motors in korts with 40 ml props and it will run for about four houds on two 6volt LA batteries......

Bunkerbarge,
Is the gear ratio changable in the gearbox without purchaseing more gears, or do you have to ghange gears completely......


Roy

[Bunkerbarge]

I haven't taken it apart but as the ratio is marked on the casing I suspect it isn't designed to be adjusted.  I'm not sure about buying seperate gears though.

One thing to remember, they are built like brick toilets and go forever but they do generate a bit of noise when compared to other systems.  Proper set up and lubrication will of course minimise this but also insulating the unit from the hull will help to prevent the transmission of noise into the structure.

[cbr900]

I have not yet had a real good look at the gearbox end, both motors are still in thier original boxes, will check them out and see what they are marked at.........


Roy

[sheerline]

Am I correct in thinking you could fit additional gearboxes in a 'stack' to the hectaperm motors to reduce the output? I also seem to recall they draw a fairly high current, are electrically noisy and will require good suppression. The build quality is however good and they do last for years. I have a brand new 5 pole decaperm with 2.75:1 reduction and found it to be all of the above so will probably never fit it in a model as modern stuff seems to run much sweeter.

[kayem]

Am I correct in thinking you could fit additional gearboxes in a 'stack' to the hectaperm motors to reduce the output? I also seem to recall they draw a fairly high current, are electrically noisy and will require good suppression. The build quality is however good and they do last for years. I have a brand new 5 pole decaperm with 2.75:1 reduction and found it to be all of the above so will probably never fit it in a model as modern stuff seems to run much sweeter.

No, I think you're confusing the geared Decaperm and Hectaperm with the 'Pile' versions, which were sold many years ago by Graupner. The geared motors have a grey plastic circular moulded cover over the geared output, while the Pile versions have square plug together modules to vary the ratios, the more modules the lower the gearing. Some years ago, I was quite friendly with a now deceased Ripmax rep, and he told me the story of how he and Max Coote were heading to the Nuremburg show in a car driven by Johannes Graupner. Herr Graupner laughed so much when Max explained what 'pile' meant in English, that they almost swerved off the autobahn. That would have been a considerable blow to both the German and UK model scene.

[Shipmate60]

cbr900
Deccaperm motors run about 2750rpm at the geared outlet.
They will pull up to about 7 amps but are very electrically "dirty", so do fit supressors.
Deccaperm Motors can be used from warships running from 1 1/2 inch props, to tugs running larger props.
One problem with them is the gear noise.
I have used them in 6 foot warships, my Imara has 2 running 50 mm props (2 inch), and even down to a 36 inch tug with a 3 inch prop, but with most pitch removed.
You can get other gear ratios on the Pile Gearboxes for these, but they cost an arm and a leg.
The Hectoperm powers larger tugs usually, but I must admit to taking them out of my models as in my opinion they are vastly overpriced for a relatively slow but powerful motor.

Bob

[cbr900]

These two motors have no label to say what gear ratio they are putting out, but they are the square stacked type, four stacks on each motor, on turning the motor shaft by hand the output shaft does not turn, are they centrefugal in operation or is there something missing that I do not know about......


Roy

[sheerline]

Hi Roy, they sound like epicyclic boxes, the type with planetary gears and built in the 'stack implies you have a very low ratio setup there. DO NOT attempt to rotate the output shaft in an effort to turn the motor as you may chip a gear! What you will have by way of output is likely to be slow but high torque. Large, slow turning prop setup, probably suitable for large tug and the like. Hope I'm not teaching my grandmother to suck eggs here!
Chris

[cbr900]

Chris,

No worries mate, I know nothing of these systems, but the motor shaft when turned by hand does not seem to turn the output shaft, is there something missing or do they grab when spinning....


Roy

[sheerline]

Hi Roy, the motors should be directly coupled to the gearboxes and should simply turn the lot over when powered up. Have you tried firing them up yet? Stick some volts on and see what happens.. There can be only two reasons I can think of why the output shaft does not seem to go round when the motor is turned: A, the gears are broken somewhere near the motor end of the gear train or...B, the ratio of the combined set of boxes is so low that when you slowly rotate the motor shaft, the output shaft simply turns so slowly that it's almost impreceptible to actually see it going round. Get some volts on them motors.. around six volts will do for a quick test.
Chris

[cbr900]

Chris,

I will test your theory in the morning and see what happens, will let you know tommorrow, thanks for the help.........

Roy

[cbr900]

Chris,

Tested both motors and the work perfectly, but will have to remove some of the gear drive sections, as they are that slow I can count the blades going round,,,,,,,,


Roy

[sheerline]

Or fit it to the front of a Landrover!

[cbr900]

I don't think the landrover would by quiet as slow.............


Roy