ransome thrasher speed

ransome thrasher speed

This topic has 6 replies, 5 voices, and was last updated 6 December 2020 at 22:48 by tom hardy.

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6 December 2020 at 11:12 #511931
tom hardy
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@tomhardy75463
i have built a 2inch ransome thrasher with plans from blackgates what speed should the thrasher run that is the drum drive also what 12 volt electric motor would i need to run it ok the traction engine is not finished yet and i need to show off the thrasher

tom hardy
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6 December 2020 at 11:12 #27809
tom hardy
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@tomhardy75463
6 December 2020 at 11:27 #511935
roy entwistle
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@royentwistle24699
A quick look on google gave me @700 rpm ( full size drum )
6 December 2020 at 15:36 #511999
Howard Lewis
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@howardlewis46836
To ensure that the corn is threshed properly, the reel speed needs to be fairly closely controlled. Hence a governor on the engine driving it. The exact speed would be determined by the diameter of the reel on a particular make and model of machine.

On mechanically governed internal combustion engined combine harvesters, the engine speed was held to 5% or less from Full Load to No Load.

Obviously in a model such precision is not needed, but some nod towards it needs to be visible,

Howard
6 December 2020 at 18:01 #512025
Clive Foster
Participant
@clivefoster55965
Run it at a speed that looks right.

Generally models run at full size speeds look frantic rather than scale.

Slow enough to see what the wheels are doing is more interesting anyway for simple showing off. Bit different if you have something of suitable size for it to actually thrash but it would still be tweak until it works.

Clive
6 December 2020 at 20:44 #512043
Denis O’Kane
Participant
@denisokane59333
Full size drum rotates between 1000 and 1100 rpm, with a beater bar speed of between 60 / 70 mph!

Too fast for a model.

Denis
6 December 2020 at 22:48 #512060
tom hardy
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@tomhardy75463
thanks for the replies very helpfull

tom
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