September 6, 200916 yr Commercial Member Hi,OK. You're coming in on approach, you touch down, you select TAXI on the condition levers, then select reverse thrust.How on earth do you keep from breaking the engines? Initially I had an over-torque, panicked, hit F1, which caused them to surge, EGT over-temp - BOOM - there goes #1.According to RW docs, you select ground idle in order to stop within published figures. Is this not possible in the sim due to FS engine modeling?Best regards,Robin.
September 6, 200916 yr Only move the condition levers to taxi when thrust reverse has been cancelled Robin. The tutorial mentions slowing through 50kts. Mark Thornton
September 6, 200916 yr Robin,You should leave the condition levers in the flight position until after you've come out of reverse thrust (I'm assuming you're talking about reverse thrust for landing). So you go touch down, power levers to reverse thrust, bring the power levers back out of reverse at 70 kts or so, then pull the condition levers back to taxi at 50 kts.
September 6, 200916 yr Commercial Member Hi,OK. You're coming in on approach, you touch down, you select TAXI on the condition levers, then select reverse thrust.How on earth do you keep from breaking the engines? Initially I had an over-torque, panicked, hit F1, which caused them to surge, EGT over-temp - BOOM - there goes #1.According to RW docs, you select ground idle in order to stop within published figures. Is this not possible in the sim due to FS engine modeling?Best regards,Robin.You select taxi on the condition levers only when you are ready to taxi (after you have decelerated below 70 knots). You are blowing up your engines because you are not leaving your condition levers full forward while reversing. Please consult page CH04:108 (page 161) of your PMDG_J41_AOM manual. Vin Scimone Precision Manuals Development Group www.precisionmanuals.com
September 7, 200916 yr Author Commercial Member Hi,I tried that, and it was fine!!I noticed a bit of weirdness the first time in that the torques went through the roof and blinked for over-torque condition, but were fine the second time, so I'm guesssing FSX glitch??Overall, VERY pleased with the aircraft!! It is a dream to hand-fly! I can accurately fly it on instruments, which is always good!!Best regards,Robin.
September 7, 200916 yr Robin, when you mention the torque jumping up, are you referring to when you brought the power levers out of reverse? I believe that's an FSX issue that happens when you bring the power levers out of reverse too quickly and into idle beta, or something like that. If you see that happen again, try moving them slightly forward and see if things calm down a bit.
September 7, 200916 yr Author Commercial Member Hi,Hmm - can't remember. I think it was whilst it was in reverse. I'm aware of the issue of FSX going to full powqer when slightly in reverse, but I'm fairly sure I was in full reverse at the time.I found a semi-work around for the surging issue (when it occurs) - press F4 - the throttles go to the little levers position (but not beyond) and this seems to prevent FSX doing whatever it does. Then pressing F1 quickly after this, helps keep the engines within reasonable parameters.So far I had this issue once out of two attempts. I'll fly a few more circuits and full-stop landings and see what happens.Best regards,Robin.
September 7, 200916 yr In the real TPE331, selecting LOW-IDLE (or in the J41's case TAXI) on the condition levers while you have too much reverse selected leads to a condition called BOG-DOWN.Bog Down is when the engine is working abnormally hard and the fuel scheduling cannot provide sufficient fuel to maintain RPM.A note from a manual I have concerning the TPE331.An engine bog down is indicated by either:- A drop of RPM below appx 65% with the speed lever (condition lever) in the LOW (taxi) position and the power lever aft of Flight Idle in static conditions on the ground.- A drop of RPM below appx 90% with the speed lever (condition lever) in the HIGH (flight) position and the power lever retarded into the REVERSE / BETA range during the landing roll above appx 30 KIASThis leads to an excessively high ITT because the USG (Underspeed Governor) is scheduling a large ammount of fuel, but because of the high load on the engine, the decelerating engine cannot provide enough airflow.Proceed as follows (edited for the J-41)1. LATCH RELEASE (AFFECTED ENGINE) - DEPRESS2. CONDITION LEVER - FEATHER / SHUTOFF!!CAUTION!! Selecting of the engine control switch to STOP is not recommended. This will cause a further rise in ITT due to activation of the fuel purge system.Hope this is helpful in bringing some light into the situation.Selecting the engine stop switch to STOP
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