warchild
Charter Member
Hi Pam.
Ok, I installed the latest aircraft.cfg and .air files you sent.
The RPM problem,as it existed , is fixed. I had full control of the RPMs throughout the entire flight envelope, except:
Now when I slow down, as though for approach and landing, 110-130-ish kts, full flaps and gear down, at about 2000' MSL, although I kept it level at that altitude and adjusted MP to maintain airspeed, I couldn't get the RPM high enough now to match up with recommended values posted in this thread. 30" MP, 2000 RPM.
I could get the MP easily, but the RPM's stayed down around 1800-1500. Again, it depended on MP and airspeed. I didn't try it at any other altitudes. I will later this evening, when I have time. Even when descending at 600 FPM, the RPM's on full high-speed, or full fine, or however you care to say it, they never came above about 1700, assuming the correct airspeed. Just above stall.
Since this was all done at the end of my flight time available, I couldn't get super detailed tests in. Again, I will test it more this evening.
Just wondering: Is there a POH or something similar available? Airspeeds for different phases of flight, weights, MP, RPM's Flap settings, and so on?
I got the flap speeds and full flaps/no flaps stall speeds, cruise speed, etc out of the aircraft.cfg file, no problem, but it'd be nice to have good, Northrup info available to use.
Thanks again, this is a really fun plane as far as the WAY it flies! How much stick or rudder input is needed for different maneuvers etc is very realistic. At least I gotta assume it is, never having flown in a real one
I even pulled a full loop. Great fun indeed!
Pat☺
Hi Pat..
Indeed, it would be nice to have a Pilots Operating Manual from Northrop. Unfortunately, to the best of my knowledge, one has never been made public. At this point, this plane is still mostly an unknown. Thanks to Fliger747 and his vast resouces however, we've learned that at least most of our "guesses" have been accurate. SO, working from that, i can finally dial this in. You will still have to give it gas to start it. Theres no free rides in this plane. The pilot will have to fly it for real as it refuses to slip gently into that Idylic space that exists for first time pilots..
I'm going to pull a bit of old Army on you here. You see, the P-61B had an engine issue. Between 1450rpm and 1900rpm, the engine would try to shake itself apart. The Army, in its sage wisdom issued an edict for the pilots not to operate the vehicle between those two rpms. What that means is that the pilot was supposed to somehow make the engine go from 1400rpm to 2000 rpm without ever touching any rpm in between or risk an article 15.( yeah, thats the army for ya ). SO.
Dont go to 2000rpm.
The settings i originally gave were place holders anyway, and only worked with an engine that was way out of plumb. The corrections i've made have changed the whole ball game as you now have cleaner power throught the entire range and the operation is more in line with the reality that should have existed. try these instead please..
Takeoff:
2700rpm
63In/HG MP
Climbout:
2700rpm
54 In/HG MP
Cruise:
2450rpm
45 In/HG MP
Approach:
2300 rpm
20-30 In/HG MP
Let me know what you find..
Pam