help with a reduction system

[eng2010]

i have an engine with 7hp and 1450rpm its connected to a reduction gearbox which connected to another system,the final reduction ratio is 1:35
i want to know what would be the effect of the reduction on the hp? how much would it go down? thanks

 

[zekeman]

Slight loss of HP due to friction and churning in geartrain.

 

[GregLocock]

Figure on at least 2% per gear pair

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[GregLocock]

Figure on at least 2% per gear pair, if they are spur gears, or at least 20% if it is a worm drive

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[eng2010]

what if there is a sprocket (chain) included in the reduction system,this chain connects a 180mm diameter gear with a 500mm gear? what would be the loss?

 

[PeterCharles]

Say 2.5% for a lubricated chain drive.