FORUMula1.com - F1 Forum

[f1ea]

If you look at the picture below, you will see on day two there is clearly a new lump, in the shape of a channel from where the exhaust was on day one. The channel clearly leads back to the diffuser. I think the RB7 is channeling exhaust gas to the diffuser. This was supposed to be banned, but obviously they have found a loophole. And perhaps this is what Ferrari and Macca's found also.

I thought what's banned is the double-deck diffuser, not the exhaust-blown diffuser...

[spankyham]

If you look at the picture below, you will see on day two there is clearly a new lump, in the shape of a channel from where the exhaust was on day one. The channel clearly leads back to the diffuser. I think the RB7 is channeling exhaust gas to the diffuser. This was supposed to be banned, but obviously they have found a loophole. And perhaps this is what Ferrari and Macca's found also.

I thought what's banned is the double-deck diffuser, not the exhaust-blown diffuser...

They didn't ban the low blown exhaust, but they did ban (or at least try to ban) feeding the diffuser from other sources - i.e. no double or triple diffusers. What I see is the exhaust clearly being channeled thru that lump you can see (introduced on day 2), back to feed the diffuser.
Perhaps we could call this the Claytons Double - The double diffuser you have when your not allowed to have a double diffuser

[bigpat]

Am I missing something here? I would have thought any time you point an exhaust outlet rearwards between the rear wheels, you are by default, blowing the rear diffuser, aren't you? I understand you cannot vent the exhaust into the diffuser through an aperture, but this system as pictured seems fine? Where does this breach the rules?

[spankyham]

Am I missing something here? I would have thought any time you point an exhaust outlet rearwards between the rear wheels, you are by default, blowing the rear diffuser, aren't you? I understand you cannot vent the exhaust into the diffuser through an aperture, but this system as pictured seems fine? Where does this breach the rules?

The rules were changed this year so as there were no more openings allowed in the diffuser except for the starter motor hole and 5cm on the outside. This was supposed to stop teams placing other feed points into the diffuser. If you look at the pictures I posted, you can see it was not there on day-1, but, on day-2 the rear was changed and there is a channel going from the exhaust to an obvious slot in the floor where the gas must come out at the 5cm opening. Again they will be using an overrun to keep the gas coming when you go off the throttle - not too much to damage the donk, but enough to keep the exhaust gas velocity there.

And, obviously, they are not breaking the rules, they found a loophole (pretty obvious one when you come to think of it) and I suspect McLaren and Ferrari found the same thing - they are just holding back a little longer because they want to get at least one race advantage. This will be relatively easy for other teams to copy. And much easier and with none of the baggage of the Renault FEE.

[Robert12010]

Am I missing something here? I would have thought any time you point an exhaust outlet rearwards between the rear wheels, you are by default, blowing the rear diffuser, aren't you? I understand you cannot vent the exhaust into the diffuser through an aperture, but this system as pictured seems fine? Where does this breach the rules?

The rules were changed this year so as there were no more openings allowed in the diffuser except for the starter motor hole and 5cm on the outside. This was supposed to stop teams placing other feed points into the diffuser. If you look at the pictures I posted, you can see it was not there on day-1, but, on day-2 the rear was changed and there is a channel going from the exhaust to an obvious slot in the floor where the gas must come out at the 5cm opening. Again they will be using an overrun to keep the gas coming when you go off the throttle - not too much to damage the donk, but enough to keep the exhaust gas velocity there.

And, obviously, they are not breaking the rules, they found a loophole (pretty obvious one when you come to think of it) and I suspect McLaren and Ferrari found the same thing - they are just holding back a little longer because they want to get at least one race advantage. This will be relatively easy for other teams to copy. And much easier and with none of the baggage of the Renault FEE.

[Gaz]

Nice shot there.

So they are not forward facing just front exiting.

Mods please can you edit title?

[f1ea]

So basically what's changed in the regulations this yr is the clarification of the shapes and sizes of the diffuser, and the allowable entrances to it. Not whether the diffuser is blown or not, so teams still have some ways of blowing it, within the regs. Also, this (the blown diffuser) played much bigger part with the huge diffusers of last yr.

I think the focus this yr has shifted slightly towards weight/balance and suspension design. The things that dictate tire wear and mech grip, that's what F1 has been aiming to achieve, less aero.

[bud]

Nice shot there.

So they are not forward facing just front exiting.

Mods please can you edit title?

well considering exhaust hosings usually face backwards from the exhaust manifold i think its a fitting title.

[killem2]

So wait, you mean the exhaust that comes from the engine, rather than being sent right out the back in some fashion is instead being pushed out the front? How will that even work, won't they be having issues with air flow trying to get in that opening and go up and into the engine? That cannot be good right?

[What's Burning?]

The name stuck already, it's not forward facing because that would be like spitting into the wind, it's forward exiting.

[Hammer278]

So wait, you mean the exhaust that comes from the engine, rather than being sent right out the back in some fashion is instead being pushed out the front? How will that even work, won't they be having issues with air flow trying to get in that opening and go up and into the engine? That cannot be good right?

What you say isn't possible...if you have an idea how an engine works.

Though I do have my doubts from an aero point of view. If the exhausts at least faced downwards it would make a lot more sense to me but its facing forwards.....sigh if/when this works I'm going to feel like a real clod. Because I can't see it.

[killem2]

I understand, I don't mean like its going to be filling up the actual chambers and pistons and such, I just mean if you have hot air trying to go one way and out side the clean air is trying to push up and in.

But that's assuming I am understanding what you all are saying, I thought for a moment there someone was saying it was releasing the air forward, as like what what's burning said, "spitting into the wind".

[Hammer278]

To be honest I can't see the actual exhaust per say. If it is really facing dead forward, which I assume it is, I can't see the logic in it! I'm sure it's angled somewhat downwards but I'm waiting for a shot which shows the exact outlet from a side view...which will be a challenging quest.

[killem2]

Oh i SEE now, it might face forward, but now that I look harder at it, it appears if that is the case it is flowing into some body work, so air flow can't get to it. Well that's good then just though it was point right into the wind for a second there which really messed with me.

[Jensonb]

To be honest I can't see the actual exhaust per say. If it is really facing dead forward, which I assume it is, I can't see the logic in it! I'm sure it's angled somewhat downwards but I'm waiting for a shot which shows the exact outlet from a side view...which will be a challenging quest.

To all practical purposes, it actually blows under the car and along the body, but I believe it's channeled there by body work

That's my understanding anyway. I don't pretend to be an engineer.