Pam, Very sorry to hear you are having a bad day, at least my half a blue pill 3 times a day is helping contain my Parkinsons tremors!
Anyway did a back of the envelope MoI calc according to the FS9 SDK & got
Pitch = 77235
Roll = 59283
Yaw = 110376.
I deleted the cross coupling.
Then found that the contact points wheel radius is actually the dia ( by scaling the onscreen model), so have halved that & then col #10 for the nosewheel damping was 12.98, so now its .98.
This has stopped the jitters which can be seen from the onscreen g reading, not jittering. Unfortunately the props still will not stop!
Tried a few prop alterations too,
Prop rotation was 1,0, now 1,1
beta min now 10
min gov rpm now 800, otherwise rpm too great & hence HP throttle closed so taxy speed 30 kts! Need to put prop pitch to coarse though.
low speed theory now 80.
There doesn't seem to be the necessity to change pitch or throttle at 300, it will pass through it albeit slowly - I got to 388 mph.
After all this the props will not stop - now the only thing I can think is that the prop still notation in the model mdl is wrong, as cannot see anything else that would affect them.
AFSD shows a negative rpm & gives a HP reading!
Now these work for me, might not be correct though. I still need to get more rudder authority, but thats probably in the air file.
Keep your chin up Pam, we are rooting for you.
Keith
& Josh's comment - I got over that with my mods to the aircraft.cfg prop values mentioned above, basically with the unmodified values the prop is too coarse pitch & acting like a fixed pitch prop, making it start at 10° helped, but one needs also to reduce the min control rpm.My experience dictates that the weight of the props won't allow you to go at or above 2500 until you're well down the runway on your takeoff roll. Once I get it stable (I fly VFR at about 3-4k') I usually pull back to 2000 or 2100 and 40" of MP, that'll get you up to 300 mph pdq
Just wondering the trick to the prop control on this and the Reporter. I have trouble finding the sweet spot. If I pull the prop control from where it is initially it will bring the RPMs down as expected but then they will rise again. If I push it they rise very slowly. I can get it off the ground, but it takes more work than I am used to. (Usually on these big radials I take off with about 50" MP and about 2500 RPM. Even when I initially adjust the Widow and Reporter to this they just don't accelerate and I have to walk the RPMs through 2500 till I get to the setting that works.) Looks great and fun to fly once off and trotting though!
Pam, I normally don't fly with anything checked that will cause me to have a bad flight (crash detection, engine exploding, airframe coming apart in mid-air, etc), lol. However after reading all the previous posts and all the adjustments people are making to the airfile and cfg file I decided to do my worst and check everything available.. . . . . .My recommendation is to set an axis for propeller rpms and use that instead of prop pitch. Takeoff is max rpms ( 2700 ) though most likely you'll be in the air before you hit 2300 rpms. The plane is incredibly powerful. It also weighs half again as much as a fully loaded B-25 bomber at 34000 pounds. At the beginning of your takeoff run, the blades follow the throttle until they are at maximum pitch. As the plane overcomes the weight (MOI's) the blades adjust and trim to a finer pitch. As you rotate and begin your climb, the blades once again go to full pitch and bite into the air to pull you off the ground and up, and your rpms stay low. What I do is after takeoff I level out and wait for the rpms to come to full (2700) then I throttle up and begin my climb.
The base rule of thumb is to set your MP to 54 I/Hg and rpms @2700 for takeoff. For cruise Set your rpms to 2400 - 2450 and your MP to 50 I/Hg. 45 I/HG is also acceptable. Cruise is 315 mph, though it'll probably creep up to 350.
hope this helps a little bit..
Pam
I made a P-61 video! Landing at TOL, New Britain. If you're in IE you will only see a black box. Go to FF or Chrome. Don't know why yet.
Works great in P3Dv4.2 Pam, nicely done!!!![]()
Pam, I normally don't fly with anything checked that will cause me to have a bad flight (crash detection, engine exploding, airframe coming apart in mid-air, etc), lol. However after reading all the previous posts and all the adjustments people are making to the airfile and cfg file I decided to do my worst and check everything available.
Amazingly, your description above matches what I found without doing anything other than simply "Flying the airplane". . .what a concept, lol. I also level off after gaining some altitude, enough to clear tall grass, low trees and little birdies. . .and allow the airspeed to increase to a respectable level for a 1000'fpm climb rate. By the time I was at 4000' I was at 300kias. I flew like that (adjusting the RPM's to 2400 and MP to 45in) and flew from Nantucket to Logan. Then I decided to take the flight to Loring, Maine and so I began a climb to 24,500 (just below critical altitude). I maintained a climb rate of a rock steady 1000fpm at an airspeed of 300kts. It took an additional 120nm to make it to 24,500 and then leveled off and again adjusted the RPM's to 2200 and the MP to 42in which gave me a ground speed of 412kts. I failed to keep an eye on my distance to Loring and after fiddling in the forums a bit found myself just 54nm from my destination and still humming along at 24,500, lol. I set the descent to 3000fpm, pulled the rpm and Mp settings back to keep things respectable and when I was 10nm out I was just under 4000' (airport elev. is 750approx). . .set up for landing and touched down with nary a puff from the tires. . .a beautiful airplane. . .you should be proud of the work you did on the FDE. . .splendid.
Excellent flyer all around but I have noticed that the props seem to turn the wrong way at start and running to I suppose. By wrong way I mean against the angle of the prop if that makes sense. They are turning to the port wing tip but the blades show they should be turning to starboard. Otherwise been having a lot of fun with your splendid fde, Pam!
Lol I know how that is as well! I say to the cat, I have get up, Cat says no you don't.I had initially reversed one prop to help troubleshoot the problem where the plane pulled to the left, but it took your comment to spur me into going through and finding the culprit.. For that, I thank you. However, my cat is not happy.. Your astute observation and the resulting inspiration lead me to change my position as i opened the files to edit, and that woke him up as he was sleeping on my lap.. Poor kitty :: The solution is below.. Thank you for that.
Pam