Rally Cars

[cowie165]

Watching a bit of the ARC today - what is that whiny noise you can hear when the camera is in-car? The sound is similar to a large DC motor or something. Is it transmission noise? It increases in volume with RPM.

Just wonderin'...

[R32Big_boy]

That would probablly be the heavy duty gearbox that they are using.

[foznice]

some kind of interferance with radio's... ungrounded cables?.. alternator whine?..

[Links]

Say it's the gearbox + driveline - goto remember the whole car is stripped out..

[CrazyMan]

straight cut gear set... put your car in reverse, you will hear the same noise

[foznice]

ah yes of course, and it's a much higher frequency becasue it's all spinning much faster than in reverse.

[CrazyMan]

thats right.... your output shaft is spinning a lot faster, hence, greater frequency

[Ronin 09]

thats right.... your output shaft is spinning a lot faster, hence, greater frequency

<{POST_SNAPBACK}>

don't think the output shaft is turning any quicker...

it's to do with the meshing of the gears - the meshing of conventional diagonal cut gears are very quiet, vs straight cut gears which mesh quite noisily.

[cowie165]

THanks for the replies guys. The sound brings me back to the days of Colin McRae Rally on the original Playstation

four right, tightens.... three left, four left, don't cut - ditch...

hehehe