That's pretty accurate, however I have yet to see a difference between the -66A and B in speed (we have both).If you have the 66b motors, you should be seeing 380 or so tas at fl330 up to about isa+6. Add 5-10 kts if you are maxed out on the itt(830). This assumes you aren't loaded to the max weight wise. DEN-DAL yesterday. 01+35, 388tas @fl330 isa +5
That's pretty accurate, however I have yet to see a difference between the -66A and B in speed (we have both).
Our Piaggio II is heavier and has more drag than our I, so that may be why the speed difference is nil.The B engines should hold max torque to a higher alt,
for a given temp value(785?) which will give you a higher TAS. Another thing I have found is once you are at an altitude that you are limited by temp, in cruise bring the props back to 1870. I generally see about 5-7 kts increase in IAS. This doesn't work once above fl370 though. I have been experimenting quite a bit during 2000 hrs in the P180.
No offense taken, I still have much to learn about the Piaggio.Rick,
Try running with the props at 1870 when you are at fl330-350. I usually get a few more kts ias. Wait to bring them back until after you have accelerated to cruise speed. PM me your results, I am interested to see how it works on your planes. This has worked for me on most of ours at Avantair. And I apologize if seemed to be dismissing your experience in the P180