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Author	Topic: Flaps = lift ?
Hawk General	posted 04-03- 03:00 PM I put some split flaps on the PeaShooter and when applied they just add drag and force the nose down. How can I add some lift also? IP: Logged
Razer Pilot	posted 04-03- 03:08 PM The flaps already add lift, that's why it noses over when the flaps are lowered. the problem is the CG or Center of gravity is way to far back and that's why the nose goes down. You need to move the CG forward to get the desired effect. Though it's easier to talk about then do. theres many things you can do to fix the CG and i'm not the person to ask. IP: Logged
Snickers Pilot	posted 04-03- 05:06 PM Also in some planes, it DID force the nose down. IP: Logged
Nat JAG	posted 04-03- 06:15 PM what Snickers said.. almost every aircraft has an inital nose down when flaps are applied, which is countered by sticking back and the extra lift thats added, you'll fly alot slower cause of the extra drag created, but also be able to maintain level flight at much lower speeds because of the extra lift.. thats why flaps are used for landings, you can land at much lower speeds because of the extra lift than if you had no flaps at all IP: Logged
Hawk General	posted 04-03- 09:06 PM I am not sure I want it anymore tail heavy. Already a bit elevator sensitive. As for nose down I have flown hundreds of RC models and never had a nose down on flaps, in fact we set our mixers up on our radios for 10 to 15 % elevator down to counter the balloon when flaps are added. My B-17 takes 12 % down elevator at full flap in landing config. It does slow it down though. Why do most of the planes in SDOE fly with up trim? I am trying to get my planes to fly level with no trim at cruise. IP: Logged
Raider Pilot	posted 04-03- 10:31 PM Hawk, have you used the new beta Patch and set "DrawInertiaForce" to on. You can see exactly where the force is being applied to the wings, etc. When I did this with the P-51D I see that the actual force is too much to the front of the wing, eventhough the airPt looks ok in OPS. [This message has been edited by Raider (edited 04-03-2001).] IP: Logged
Hawk General	posted 04-04- 12:30 AM Raider I have not tried the new patch yet although it sounds very interesting. IP: Logged
Raider Pilot	posted 04-04- 01:38 AM With this you can see blue lines for lift, and red for drag, as well as the angle they are to the wing. This will blow you away if you are a plane builder IP: Logged
jedi Pilot	posted 04-04- 10:56 AM Is this in the regular beta, or the "debug" version? I probably need to adjust the Corsair, since it's not behaving properly in the beta... ------------------ --jedi-- IP: Logged
Da Jug head Pilot	posted 04-04- 11:02 AM Hawk I think one other reason for the up trim is many aircraft uses the same airfoil for the hstabs and the same airk # The efficiency of the hstabs should not be the same from plane to plane (nor should the airfoil), and I'm starting to play with this to see how (in the game) it affects trim, climb, turn and other flight characteristics. If the airMax value is set too high, it can allow the flaps to drop too much and cause the aircraft to nose over. Also the difference between the RC model and real aircraft MAY (don't know enough to be sure)be the amount of air moved by the prop over the wings/flaps. The airAdvantage setting will also change the affect the flaps have. One thing on the peashooter- I don't think there are any weight values assigned to the landing gear. I was going to add weight for the tires to help move the CG farther forward, but it would work lots better if you could come up with a weight for the entire assembly. Also, assigning a weight to the ring around the engine would help distribute the weight more realistically. Here may be another reason for the nose over. This SEEMS to be how the game works, but I don't know if this is true in real life) With brakes applied almost all aircraft nose over. With flaps down, if you horse the throttle before the plane really gets rolling the lift generated by the flaps raises the tail and because there isn't enough air/lift being generated along the rest of the wing surface, the flaps have the greatest effect and will tend to nose it over because of the greater force aplied on them by the prop stream and the friction of the wheels on the ground creating a pivot point. The shorter the aircraft, the more accentuated the effect seems to be. ------------------ "Where'd he GO!?!?" thunk-thunk-thunk-zing-OUCH That answered my question [This message has been edited by Da Jug head (edited 04-04-2001).] IP: Logged
Pete Hawk Pilot	posted 04-04- 01:48 PM This is VERY true on planes like the C-141 Starlifter and B-52. To see it in action in a video, go to www.theaviationzone.com and go to the C-141 Media section. Watch the "low pass" video. It looks SO STRANGE to see it flying with the nose pointing down like that, but it really does. Here's the direct link, but that site has LOTS of great stuff, so check it out http://www.theaviationzone.com/media/videos/c141_low.avi [This message has been edited by Pete Hawk (edited 04-04-2001).] IP: Logged
Snickers Pilot	posted 04-04- 02:22 PM If I remember correctly this was also very true of the P-38 (in real life...) IP: Logged
Raider Pilot	posted 04-04- 06:08 PM Jedi, this was in the older patch that Michael H. worked on (don't remember which versions). It is still in the new patch, You do not need the debug version. I think you will enjoy this...it is very cool. IP: Logged

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