View Full Version : RealAir Simulations 172 Idle and power problems
07-01-2003, 12:25 AM
Initially the RealAir Simulations 172 flew great, however now I can't not get and idle unless I have 50% throttle with parking break. When at altitude I can hardly crack 90 knots without and headwind. I have checked the carb heat with the H key and pressing it doesn't seem to make any difference. If I switch to the 182 it idles fine and has plenty of power. Back to the 172 and the above problems still exist. Any ideas as to what a possable solution could be?
07-01-2003, 05:04 AM
Have you tried adjusting mixture? Possibly you are at a high altitude airport. You also need to adjust the mixture setting as you climb.
07-01-2003, 08:34 AM
LAST EDITED ON Jul-01-03 AT 07:36AM (EDT)[p]There is a big difference between a Skyhawk and a Skylane. The Skylane even though it somewhat remembles the Skyhawk is a much more powerful airplane. The default Skyhawk in the game is a 180hp fuel injected Lycoming. I don't know the particulars of the RealAir Skyhawk, but most of the later model 172s have 160hp either Lycomings or Continentals. Depending on the condition of the bird, in a real C172 with a 160hp or smaller engine in order to get 100 knots indicated you need to have the RPMs up around 2500 at gross. Remember, you base your groundspeed on true airspeed, not indicated. I remember chugging along to Syracuse one evening at about 70 knots groundspeed because of winds aloft.
Check and make sure that your throttle is calibrated. Also make sure the carb heat is not on. This is a real RPM killer and in the game is magnified. When you have a high density altitude in the game, carb heat can keep you from getting a good idle.
07-01-2003, 10:57 AM
Sorry, should of said before, I have adjusted the mixture too, and as stated originally, the carb heat has been looked at. any other ideas?
07-01-2003, 02:09 PM
Are you saying the engine quits at ide thrust? This could happen at high altitude airports if you do not adjust mixture.
Also at high altitude, acceleration will be sluggish, especially without a reduction in mixture.
Have a tweak of your NULL ZONE in the control menu of FS2002. It is possible that your calibration of zero throttle is not quite spot on. Sometimes assigning a very small null zone to the throttle cures this.
When finalising the flight model for the C172, we exhaustively tested climb rate, cruise and other settings at Sea Level and typical cruise heights. All were within 1-5% of specifications.
At heights approaching the C172 ceiling, your indicated airspeed will be well below your True Airspeed. You can access the True Airspeed temporarily (or permanently) by changing to this from indicated in the aircraft/realism menu.
Rob Young - RealAir Simulations
07-01-2003, 02:21 PM
Thanks for the reply. You were right on the money with the 0 throttle calibration. Assigning a small null zone took care of the problem.
Thanks again to Rob and all that tooke the time to reply.
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