First let me say that I am still getting to grips with flying the 737 after only previously been used to flying GAs and no I have still yet to read all the manuals. However, I have not had this problem with the iFLY and would like to know whether it is something that I am doing wrong (more than likely) or of it's some issue. For some reason I do not seem to be able to reduce power on finals. Even with a shallow approach slope, full flaps and spoilers I still cannot slow the aircraft to less than 200knots and the engine power does not drop below 50%. I have to add, these were just initial test flights without any info programmed into the FMC. Is that the problem or can someone shed some light on this for me. Many thanks guys.

First, don't mistake engine RPM to power- your term, and thrust- the correct term. At 50% N2 the thrust is minimal, it inceases parabolically with RPM.Second, a turbine engine increases its RPM with altitude, until such altitude that with idle throttle it would stabilize at maximum RPM. It is therefore not allowed toi exceed that altitude or the engine would be damaged.In our case with th -800, the idle RPM at top of descent is likely to be around 40% N2, which will gradually reduce with reduced altitude and airspeed.Set your initial and final approaches to gradually decelerate. When properly executed, little speed brake use if any is required, especially with tail wind when not entered into the descent foecast page.

And how do you know this exactly? Their flight model is actually not accurate, especially the deceleration rates. Check the Boeing FCOM1 and QRH performance charts if you don't believe me - we are within 5% of the real thing. The 737-800 is an *extremely* slippery airplane. All our real life crews signed off on this aspect - we had one of our tech team pilots directly compare it to a KLAX profile descent he'd just done earlier in the day in the real 800 - he said it was spot on.

Thanks for your input Ryan, appreciated. I am in no way knocking the plane, far from it, I think, like evryone else it is unbelievable (says with content smile) but as I said at the start of the post, I hold my hand up, I am inexpereinced compared with lots of other guys around here and I have yet to fully engulf myself in the manuals, so forgive me, but I have probably done something incorrectly but need some guidance as to what it is 'cos I can't get it. As Peter said earlier he cannot get the plane to fly slower than 178Knts, which is my problem also. As I said this is an initial query, I hope it is finger trouble on my part, in which case please speak softly to me! It just seems odd that on a 5 -10 mile approach with gear down, full flaps, spoilers and normal glide slope that I can't get the speed of the plane down to what it should be for landing. 150Knts avg. Thanks Mike but the throttles are fine.

First, don't mistake engine RPM to power- your term, and thrust- the correct term. At 50% N2 the thrust is minimal, it inceases parabolically with RPM.Second, a turbine engine increases its RPM with altitude, until such altitude that with idle throttle it would stabilize at maximum RPM. It is therefore not allowed toi exceed that altitude or the engine would be damaged.In our case with th -800, the idle RPM at top of descent is likely to be around 40% N2, which will gradually reduce with reduced altitude and airspeed.Set your initial and final approaches to gradually decelerate. When properly executed, little speed brake use if any is required, especially with tail wind when not entered into the descent foecast page.

Thank you Opher, a lot of great information there. But as I said before, regardless of what instruments are showing what or indeed my phraseology, the fact is that I can't get the plane to fly slower than about 190Knts no matter what!!!

I think Ryan, guys, I will have to bow to your superior knowledge of this aircraft. I have taken her up again with fully loading the FMC with a flighplan and although I can get her eventually down to landing speed, it takes forever. I appreciate this bird's characteristics and are interesting to say the least, but I would prefer it to be this way, a correct rendition of the real aircraft rather than a watered down version which is untrue.

Thanks for your input Ryan, appreciated. I am in no way knocking the plane, far from it, I think, like evryone else it is unbelievable (says with content smile) but as I said at the start of the post, I hold my hand up, I am inexpereinced compared with lots of other guys around here and I have yet to fully engulf myself in the manuals, so forgive me, but I have probably done something incorrectly but need some guidance as to what it is 'cos I can't get it. As Peter said earlier he cannot get the plane to fly slower than 178Knts, which is my problem also. As I said this is an initial query, I hope it is finger trouble on my part, in which case please speak softly to me! It just seems odd that on a 5 -10 mile approach with gear down, full flaps, spoilers and normal glide slope that I can't get the speed of the plane down to what it should be for landing. 150Knts avg. Thanks Mike but the throttles are fine. Thank you Opher, a lot of great information there. But as I said before, regardless of what instruments are showing what or indeed my phraseology, the fact is that I can't get the plane to fly slower than about 190Knts no matter what!!!

You Just need to practice a little as, although I have the 800 with winglets very slippery, it can be slowed with some planning.

I'd just like to thank all you guys for the help you've offered. I'm a new guy around here and also new to the PMDG models. I have to say this is just simply awesome!!! I have at last flown a route and landed at the correct landing speed You are right Ryan, Alfredo, the bird is very slippery to say the least!

did you change the IAS speed with the knob to Vref+5 ?

Yes. In my case, the trouble appears to be FSUIPC. Uninstalling it has cleared up all my thrust problems.

Yes. In my case, the trouble appears to be FSUIPC. Uninstalling it has cleared up all my thrust problems.

is this a FSUIPC problem which can be fixed in future releases ? or is this a pmdg problem ?