[Land-speed] VE, etc.>From>JG Magoo

[neil at dbelltech.com]

JG;

Those RPM figures are what model airplane engines turned when I was a kid. I
have fond remembrances of a Dooling .29 running on "bug juice".

Some of these little engines had extremely tight piston/cylinder clearances
so that rings could be eliminated completely. The pistons were lapped into
the cylinders to get those tight clearances. I wonder if F1 engines are
doing that; it would eliminate some friction and the high RPM ring problems.

Regards, Neil   Tucson, AZ



-----Original Message-----
From: land-speed-bounces+neil=dbelltech.com at autox.team.net
[mailto:land-speed-bounces+neil=dbelltech.com at autox.team.net] On Behalf Of
jgmagoo at comcast.net
Sent: Wednesday, April 30, 2008 2:48 PM
To: land-speed-digest
Subject: [Land-speed] VE, etc.>From>JG Magoo

I hear on the F-1 television coverage that 19,000 RPM is currently the
rule-mandated limit which cannot be exceeded either in qualifying or in the
race. This is supposedly in an effort to control escalating costs.  ;o)  (I
love it!)

>From what I have heard, sonic-wave tuning throughout the entire intake and
exhaust system plays a big part in it. Pneumatic valve springs was a major
'breakthrough' in achieving ultra high RPM several years ago. 

An interesting tidbit that I heard on the TV from Steve Matchett on his
Inside Formula One TV show was that at normal room temperature (say 70-F) a
Formula One engine is completely SIEZED, and will NOT turn over with the
starter. It is only after a period of time pre-heating it by pumping 180-F
water and 180-F oil through it that it reaches proper internal clearances
where it can be turned-over and started by the starter apparatus.   Wow!
;o)

Did you guys notice the JCB diesel streamliner using all the fancy engine
pre-heat systems at B-ville?  Who knows???  Maybe (probably) it was just for
starting with extermely low C.R. for the high boost. ???

I've seen the diesels at competition tractor-pulls pre-heated to absolute
boiling and cranked with 48-volts into a 12-volt starter, and they STILL use
either to get them to fire!

JG