Discussion
Overview from day 1 official sepang test goes something like this
Martin still ballistic
Acosta the real deal and continues to impress
Rins impressing at Yamaha
Marc had a bit of a s
t day with technical isssues
Yamaha and Honda both think they've found some improvements.
Fabios top speed only one kmh off the top speed of the day, but doesn't say if a slipstream was involved.
Early days, Marc hasn't done anything of note yet but it's been a disrupted day for him. It'll be interesting to see how the next two days unfold.
Looking at the gresini bikes they aren't even the latest 23 spec, no winglets on forks.. and Ducati appeared to have some more aero development going on with the latest bike.
I suspect acostas bike is a full factory KTM in a gas gas dress, anyone know? He's a factory KTM rider so I would assume so... Squeaky bum time for miller..
Martin still ballistic
Acosta the real deal and continues to impress
Rins impressing at Yamaha
Marc had a bit of a s
t day with technical isssuesYamaha and Honda both think they've found some improvements.
Fabios top speed only one kmh off the top speed of the day, but doesn't say if a slipstream was involved.
Early days, Marc hasn't done anything of note yet but it's been a disrupted day for him. It'll be interesting to see how the next two days unfold.
Looking at the gresini bikes they aren't even the latest 23 spec, no winglets on forks.. and Ducati appeared to have some more aero development going on with the latest bike.
I suspect acostas bike is a full factory KTM in a gas gas dress, anyone know? He's a factory KTM rider so I would assume so... Squeaky bum time for miller..
Edited by Yazza54 on Tuesday 6th February 08:57
520TORQUES said:
Prototype racing has always had very little to do with road relevance, often road technology is banned from racing.
The aero platform is simply a compromise of drag/grip to achieve the quicket lap time. The efficiency of that compromise determines who has the best ability to exploit that area of the equipment.
Even without any downforce generating aero aids, the efficiency of the aero has determined how competitive you can be, if you can reduce the size of a cooler because the aero works more efficiently that is a gain in drag, weight and weight distribution.
It's a never ending cycle, ultimately limited by the people who write the regulations.
Electronically active suspension, which is common on a lot of higher end bikes now, has been banned for years. This is why we have pneumatic shapeshifters and the like. DCT gearboxes such as on the Africa Twin are also banned in MotoGP. The aero platform is simply a compromise of drag/grip to achieve the quicket lap time. The efficiency of that compromise determines who has the best ability to exploit that area of the equipment.
Even without any downforce generating aero aids, the efficiency of the aero has determined how competitive you can be, if you can reduce the size of a cooler because the aero works more efficiently that is a gain in drag, weight and weight distribution.
It's a never ending cycle, ultimately limited by the people who write the regulations.
Electronic Variable Valve Timing is another one - must admit I don't understand this as most manufacturers have a road car system they could easily adopt without it being a huge cost issue. Would actually save money compared to the cost of developing pneumatic valves.
I suspect with all of these, the alternatives factories have been forced to engineer are because it still requires some sort of rider input - even if it's just pressing a switch.
Ultimately, if people don't want obvious wings - like a two wheeled Formula One car - then they will have to accept a significant capacity reduction. Or a different form of motive power? 750cc twins with hybrid assistance?
No pre-season testing for Morbidelli as he's out of the Malaysian and Qatar tests.
https://www.crash.net/motogp/news/1044058/1/injure...
https://www.crash.net/motogp/news/1044058/1/injure...
I think anyone who thought Acosta was NOT the real deal was watching different stuff than me in recent years, the guy is top drawer and has been since the moment he stepped into GPO racing, I do hope he goes well this year consistently. Tom be fair the Rossi livery looks dayglo so I think will be better in true light!!
Wondering why Aprilia and Yamaha are choosing to seal off the area BETWEEN both front brake discs, a few shots show a sort of carbon sealed round area level with the disc top to sort of seal the area inside, must be to do with airflow or heating or even aero, but it must also add weight to the front end as there is the box area and the support struts? I think Miguel, Aleix and Fabio ran it. Bikes usually want as little unsprung weight up front as possible to make flicking it easy.
Wondering why Aprilia and Yamaha are choosing to seal off the area BETWEEN both front brake discs, a few shots show a sort of carbon sealed round area level with the disc top to sort of seal the area inside, must be to do with airflow or heating or even aero, but it must also add weight to the front end as there is the box area and the support struts? I think Miguel, Aleix and Fabio ran it. Bikes usually want as little unsprung weight up front as possible to make flicking it easy.
Marquezs Stabilisers said:
Electronic Variable Valve Timing is another one - must admit I don't understand this as most manufacturers have a road car system they could easily adopt without it being a huge cost issue. Would actually save money compared to the cost of developing pneumatic valves.
Pneumatic valves and VVT have different goals. Pnuematic valves are there for high RPM valve control, VVT is to increase the RPM range where the valve timings are in their sweet spot.
2ndclasscitizen said:
Pneumatic valves and VVT have different goals. Pnuematic valves are there for high RPM valve control, VVT is to increase the RPM range where the valve timings are in their sweet spot.
That much is true - pneumatic valves are to prevent valve bounce at high RPM - though I'd like to see someone try a magnetic system as an alternative. I am probably wrong but I seem to remember a patent Cadillac of all people took out in the late 90s on this. This is of course because the rest of them won't want to lose face and use a desmodronic system. Alternatively, drop the rev limit to a point where valve bounce isn't an issue - and bringing in power low down might be where VVT comes in.
Yazza54 said:
Haven't seen what you're talking about but I'd hazard a guess it could be to keep heat in the disc and slow dissipation into the wheel and tyre
That's pretty much exactly how the Brembo GP tech blurb explained itSaid that it's in the interest of performance to retain heat into the disc, and previously they've ran a shroud on the outer edge, but the cost of this is that heat goes inwards. That heat then dissipates through the spokes and rim into the front tyre. Front tyre temps, and the effect on pressure has been a hot topic (pun not intended), so it's logical to try and reduce that
Historically, the Carbon discs were designed asymmetrically, so that style of heat sheild wasn't possible, but since they've worked with the teams so that the hot air going outwards doesn't adversely affect the aero of the bike
graeme4130 said:
Yazza54 said:
Haven't seen what you're talking about but I'd hazard a guess it could be to keep heat in the disc and slow dissipation into the wheel and tyre
That's pretty much exactly how the Brembo GP tech blurb explained itSaid that it's in the interest of performance to retain heat into the disc, and previously they've ran a shroud on the outer edge, but the cost of this is that heat goes inwards. That heat then dissipates through the spokes and rim into the front tyre. Front tyre temps, and the effect on pressure has been a hot topic (pun not intended), so it's logical to try and reduce that
Historically, the Carbon discs were designed asymmetrically, so that style of heat sheild wasn't possible, but since they've worked with the teams so that the hot air going outwards doesn't adversely affect the aero of the bike
See it all the time in F1, I'm surprised it's taken so long. Up to now they've all just chosen aero packages based on design theory / CFD and feel, wind tunnel too I guess but it's all static environment stuff.
Mega laptimes so far today, Marc is improving but the '24 Ducati appears to be ballistic straight out of the box. Probably not a good thing for quality racing..
Mega laptimes so far today, Marc is improving but the '24 Ducati appears to be ballistic straight out of the box. Probably not a good thing for quality racing..
Edited by Yazza54 on Thursday 8th February 07:09
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