Rear wheel and chain oil containment

[powerhouse]

Just got to change one Cable tie,the top brush one for a metal one (heat)
Cost of brush length 1meter £5 from wicks

[grahamaust]

An "O" ring chain will probably be ok due to the lube mainly being internal, but those that use a conventional style chain (lot less power loss, less weight etc) would have a problem with the wiping action of the brushes removing all the lube effectively in the first half lap.....

And I hope you have a method of catching all the lube that runs down the brushes.....maybe there will be a new regulation coming for that next.

Does common sense not prevail with your rule makers?

Graham..... 35C today....no sign of snow

[powerhouse]

Graham I'm all for rule changes for the benefit of the sport and the people in it but this is abit silly.
I will say your comment on chain lube got me looking. The brushes don't actually touch the rollers so little wiping there.

[dags]

Our bike leaves Australia in a week and a half for the TT, so we wanted to know for sure before we let the bike go that it would comply to the relevent rules for oil catchment. Her is an email I received from Billy Clucas regarding this rule:
With regard to your query about the oil containment on F2 Sidecars I am forwarding a photo of the oil containment requirements.
Although this is a photo of a F1 machine the containment requirements are the same. With regard to the chain run, it is if the chain actually runs through the oil tray that the curtains are required, I notice that you have covered the front sprocket, you will need to cover the tray at the rear of the run if the chain runs through the edge of the tray.
Note that the rear of the tray the outer edge MUST BE to the height of the swinging arm and the minimum width to be equal to the width of the rear tyre. The rear wheel to be covered by a dividing wall from the inside of the bodywork to the bottom of the tray. This divider to overlap the rear edge of the tray down to the bottom of the tray.
The surrounding edges of the tray must be to a height of 50mm.
If you have any further questions on this please do not hesitate to contact me.
Best Regards
Willy Clucas

Im still a little confused.

Dags

[powerhouse]

Have you got the picture dags? be interesting to see there rendition.

[dags]

F1 Oil catchment.

[kew]

Darryl,
I think Billy may have confused the issue slightly by showing you an F1.
The back wheel has to be seperated from the engine, on an F2 this is usually achieved by a sheet of GRP or alloy up the front of the swinging arm fitting against the underside of the seat unit and down to the bottom of the oil tray.
This sheet must be at least the width of the back tyre.
The idea is that in the event of a blowup no oil reaches the back tyre, as long as you achieve that then I see no problem.

[Jo Warriner]

I agree with Kew.

[powerhouse]

Billy is very confused !!
Why on earth would he send a pic of an f1 in answer to a f2 question With none of the separation.
That's right come all the way from oz and not be allowed to race.

I'm thinking of starting a new business franchise, if anyone is interested. All you need is a van full of ally sheet and stocks of clips and cable ties then park up in any pit area you like. Take a flask you might be busy

[teamradar]

With regard to the chain run, it is if the chain actually runs through the oil tray that the curtains are required, I notice that you have covered the front sprocket, you will need to cover the tray at the rear of the run if the chain runs through the edge of the tray.
Best Regards
Willy Clucas[/i]

Im still a little confused.

Dags

I'm confused too!!
My bottom chain run is 90mm above the bottom of the catch tray i.e 40mm ABOVE the 50mm requirement.
Does this mean I don't need a chain curtain?
If this is the case we require proper clarification.

[little chud]

Darryl,
I think Billy may have confused the issue slightly by showing you an F1.
The back wheel has to be seperated from the engine, on an F2 this is usually achieved by a sheet of GRP or alloy up the front of the swinging arm fitting against the underside of the seat unit and down to the bottom of the oil tray.
This sheet must be at least the width of the back tyre.
The idea is that in the event of a blowup no oil reaches the back tyre, as long as you achieve that then I see no problem.

I agree with Kew too, which is why it shouldn't need to go through flaps/brushes etc etc as it has to be at least the width of the tyre.....not more than the width or the full width of the seat.

jc

[Jo Warriner]

After a meeting of technical officials on Monday night, this question is being put to the ACU for a definitive answer.

The regulation says chain slots need to have a rubber/flexible seal. I would say if the chain is without the oil containment, then you don't have a chain slot and therefore you don't need a seal of any kind? But that's just my personal interpretation!

[tufty113]

if anyone with a f2 is stuck sorting this and needs a hand give me a call ....if you want to pop over my workshop is based in the south east of england...thanks dixie

[speech]

i think people are making this over complicated
the side walls have to be 50mm high and follow the outline of the engine, the rear wall has to be the hieght of the swing arm spindle.
therefore if you design the in board wall ie the one on the chain run side to huge the engine after you have gone past the sprocket the rear wall only has to cove the rear wheel width and no need for chain wipers .

this interprtation could me i m goingb to be very busy one morning to get passed the scruits

[Wal]

OK Kew, I think I got it now, Soooo. . . . . in my tray with the 50mm sides, I have . .

Auto Bilge pump.jpg (16.23 KiB) Viewed 5446 times

Which will empty pan into the 5 litre catch tank secreted . . . .somewhere !! Voilà !! no oil splash