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#21
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Does anyone know which way the engine spins on a gas truck? (GT2, AD2) I know they have 2 idler gears, but I think they're on the same axle :-(
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#22
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Not only would the 2 'snap' in the right direction, the motor would 'snap' very, very close to the batteries and CG ===> very low polar moment of inertia ==> extreme snapage!
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#23
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I think they spin the same way as elec, the last exploded diagram I looked at had the i idlers on the same shaft.
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#24
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Would having two idler gears have the same result as having no idle gears??? Less weight!
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#25
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Quote:
but with just 2 gears (no idler) it would be pretty hard to get the right internal ratio and get the motor to meet with the spur. |
#27
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Yep. No idler gear is impossible. Many have tried. Many have come to the same conclusion :-)
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#28
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There is no idler gear in the slim2
__________________
Jonathan | Atomic-Carbon |
#29
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Im sure it could be done, no idler gear I mean. but would have to have whole new gearbox moulded.
EG. If a stock diff gear is 30teeth and layshaft is 15, that 2.0:1. These won't meet up with no idler gear as spur would hit outdrives, motor into diff etc. But if the diff gear was 40teeth and layshaft 20, or 60teeth and layshaft 30, that would still be 2.0:1 and create clearance, more flywheel effect perhaps, less bearings, less friction??? Chris |
#30
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It also raises your outdrives too far too, you can always go like they had on the Top Cat/Couver/Cougar II and have a belt drive rear box, this would allow you to have a low outdrive height but sufficient clearance for the spur gear.
__________________
dragon paints : team tekin : fusion hobbies :SCHUMACHER RACING : Nuclear R/C for all my sticky and slippery stuff - if it needs gluing or lubing, Nuclear RC is the man! |
#31
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Does the idler gear effect the ratio at all? How do you work out the ratio of the box?
Belt drive is ace though! G
__________________
Graham North http://www.atomic-carbon.co.uk https://www.facebook.com/atomiccarbon https://www.facebook.com/nortechracing |
#32
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Quote:
Idler has no effect whatsoever on ratio. It cancels out. Internal ratio = diff/top gear. |
#33
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Thought I remembered that from Physics!
Whats the XXX4 syndrome? Being pants? G
__________________
Graham North http://www.atomic-carbon.co.uk https://www.facebook.com/atomiccarbon https://www.facebook.com/nortechracing |
#34
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Having the outdrives way too high.
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#35
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Ah, ok. What does that do then?
G
__________________
Graham North http://www.atomic-carbon.co.uk https://www.facebook.com/atomiccarbon https://www.facebook.com/nortechracing |
#36
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for starters, you will have to have longer than needed driveshafts, so that means deeper outdrive too, as the suspension compresses, it will push further in to the diff outdrive, plus there are handling implications too, but not sure as to what.
__________________
dragon paints : team tekin : fusion hobbies :SCHUMACHER RACING : Nuclear R/C for all my sticky and slippery stuff - if it needs gluing or lubing, Nuclear RC is the man! |
#38
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'maybe', lmfao!
__________________
Graham North http://www.atomic-carbon.co.uk https://www.facebook.com/atomiccarbon https://www.facebook.com/nortechracing |
#40
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IT SUCKS!
The XXX4 is basically a sled with wheels. There's what Jimmy and DCM said. That sucks. Then there's the fact that you can't have your 'dogbones level' and have any ride height left. You can't even have the roll center anywhere near where it should be if you want any sort of decent ride height. So in any case: it sucks. |
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