...and where else could discussions on top-fuelers possibly finish up :)
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
Behalf Of Anthony Cesaroni
Sent: Friday, 11 December 2015 1:55 PM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Closing the loop on rocket engines
I know shit I guess. I can test a top fuel engine in under 5 seconds but the
results would probably effect ticket sales.
Best
Anthony
Sent from my iPhone
On Dec 10, 2015, at 9:47 PM, Monroe L. King Jr. <monroe@xxxxxxxxxxxxxxxxxx>
wrote:
Measuring the power output of a top fuel engine directly is not always
feasible. Certain models use a torque sensor incorporated as part of
the RacePak data system. Dynamometers that can measure the output of a
Top Fuel engine exist; however, the main limitation is that a Top Fuel
engine cannot be run at its maximum power output for more than 10
seconds without overheating or possibly destroying itself explosively.
Making such high power levels from such relatively limited
displacement is a result of using very high boost levels and running
at extremely high RPMs; both of these stress the internal components
to a high degree, meaning that the peak power can only safely be
achieved for brief periods of time, and even then only by
intentionally sacrificing components. The engine power output can also
be calculated based upon the car's weight and its performance. The
calculated power output of these engines is most likely somewhere
between 6,340 and 7,460 kW (8,500 and 10,000 hp),[8] which is about
twice as powerful as the engines installed on some modern diesel
locomotives, and approaches the power output of the largest aviation
turboprop engine ever built, the 12,000 hp Soviet Kuznetsov NK-12
engine, with a torque output of approximately
8,100 newton metres (6,000 lbf·ft) and a brake mean effective pressure
of 8.0–10.0 MPa (1,160–1,450 psi). Of course, both locomotive diesel
and aviation turboprop engines are designed to produce these power
levels continuously for hundreds of hours without failure; one could
increase the power output of either one by many times if you were
willing to limit power output to 10 seconds or less.