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#6826 | ||
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Join Date: Mar 2008
Posts: 4,600
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Quote:
http://www.as-books.jp/ And Amazon Kindle edition will be available soon at Amazon.co.jp. Search the Amazon for "motor fan illustrated" http://www.amazon.co.jp/In-English/b...8&node=1094656 |
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#6827 | |
Racer
Join Date: Dec 2013
Posts: 128
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I think you're right. A rpm of about 10000 and a power output of 400kW seems more plausible for a natural aspirated engine if i consider the Audi turbo engine with 3,7 l displacement revs to 4700rpm and makes about the same power.
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#6828 | |||
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Join Date: Feb 2013
Posts: 2,132
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Quote:
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In order to finish first, first you have to finish ![]() |
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#6829 | ||
Veteran
Join Date: Oct 2013
Posts: 1,240
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Quote:
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#6830 | |
Racer
Join Date: Dec 2013
Posts: 128
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Thanks for that info. Do you still know when samurai posted this reportage?
If the wikipedia power number of 395 kW ( http://de.wikipedia.org/wiki/Toyota_TS030_Hybrid ) is correct, then from a torque of 400Nm we could calculate 2*Pi*f = Power / Torque = 395000 W / 400 Nm = 987,5 1/s, that would be a rpm of 9430. If i calculate power as P = 0,5 * f * p_av * V (0,5 because of the 4 stroke engine, p_av the average pressure of ~15bar=15*10^5 Pa for NA race engines and V = 0,0034m³ being the displacement), this would give a frequency of 154,9 1/s or a rpm of 9294. So my calculated of 5200rpm was probably wrong due to the sound quality of the video, and the correct max rev should be in the region of 10400rpm. |
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#6831 | |
Veteran
Join Date: Oct 2013
Posts: 1,240
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The article was posted by the user Bobby_GT6262 in the 2013 super GT section, not by Japanese Samurai.
http://www.speedhunters.com/2013/11/...t500-in-detail on page 2, is revealed the torque of the RV8K GT500 engine, 392Nm. Actually I don't trust wikipedia, only TMG engineers know the real power output of the TS030 motor. I bet my 2 cents that only in the last 2 races, TMG used a full power engine setting. At Le Mans both toyota's could never be able to finish the race using the engine revving close to 10000rpm. |
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#6832 | |
Racer
Join Date: Sep 2009
Posts: 209
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Oreca will be partner of tmg also for 2014?
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#6833 | |
Veteran
Join Date: Sep 2010
Posts: 15,418
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#6834 | ||
Racer
Join Date: Dec 2013
Posts: 128
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Quote:
And for me a maximum rev of 10000 doesn't sound to hard to achieve, even with an engine that's made for the 24h race. But that's only the max rev, the average rpm for the complete race will be somewhere in the region of 9000-9500 imo. The estimations in my post above show that with the help of the estimated torque and average pressure in the combustion chamber a rpm of at least 9000 is needed to achieve the 395 kW. |
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#6835 | |
Veteran
Join Date: Oct 2013
Posts: 1,240
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Official statements never tell the truth. Peugueot always claimed 700hp for the 908HDi, but in a recent interview Wurz said that the car had >800hp. This year audi sport officially reported 510hp as max power of the 2013 R18 etron quattro. Don't need to say that was a lie.
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#6836 | |
Racer
Join Date: Dec 2005
Posts: 246
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if that power figures were right, we would have cars with no drag at all to achieve the speeds they have in Le Mans...
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#6837 | |
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Join Date: Sep 2010
Posts: 15,418
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Audi probably puts out around 600hp with the r18. No reason to believe the team's estimations. Toyota probably making 580hp is my guess.
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#6838 | |
Racer
Join Date: Dec 2005
Posts: 246
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I totally agree with TF110 figure...that's much closer to what i found with my calculations as well...more or less...
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#6839 | |
Racer
Join Date: Dec 2013
Posts: 128
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If the real power figures are higher than the published, what i think is very likely, then the estimated rpm would also be higher if you look at my calculations above. Probably pretty close to the 10400 rpm that the second guess gave from the frequency analysis.
silente, how did you calculate the power? I did some calculations on my own for the Audi by looking at the published telemetry data from onboard videos (speed vs. time) and the topspeed and estimated the wheel power from that as P_wheel = ( mass x acceleration + drag ) x speed. This estimation showed me a maximum combustion engine power at the wheels of ~560hp and a maximum combined wheel power (combustion + electric) of ~750hp. The electric power was used up to ~258km/h. What do think of these numbers? |
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#6840 | |
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Join Date: Mar 2008
Posts: 4,600
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I've checked out the MFi magazine again.
Hisatake Murata (Toyota) says that max rev of TS030 engine is around 10,000 rpm. |
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#6841 | ||
Racer
Join Date: Dec 2005
Posts: 246
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Quote:
Also, the speed shown on Audi's videos are somehow misleading. They show much lower speeds that what is shown on FIA website, for example. Anyway, according to what i found, your estimation should be more or less correct. I wrote something about that here: http://drracing.wordpress.com/2013/0...deling-part-2/ |
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#6842 | |
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Join Date: Sep 2010
Posts: 15,418
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Looks like TMG is hiring. Some high profile positions as well, like cfd and aero engineers.
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#6843 | ||
Veteran
Join Date: Nov 2013
Posts: 734
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Giving up people who are from the demised Peugeot ?
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__________________
Eat, sleep, race, repeat. ![]() |
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#6844 | |
Veteran
Join Date: Jan 2003
Posts: 3,795
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Keep in mind that TMG has other business activities not related to the LMP1 project so we never know what these job openings are for.
In the past, some of these mentioned the LMP project specifically, none of these do though. |
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#6845 | |
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Join Date: Sep 2010
Posts: 15,418
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