VireVolte_tigrou Posted January 2, 2009 Posted January 2, 2009 (edited) In the way to improve animations on my 3D model, I've got some questions about how controls are working on JAS-39. Especially : -> If "ailerons" and "flaps" (in fact, two half-elevons) on each wing are fully united or if they work differently on roll. -> If canards participate on roll... Thank you. :) Edited January 2, 2009 by VireVolte_tigrou 1
JaNk0 Posted January 3, 2009 Posted January 3, 2009 Hm this isn't 100% correct, but from what I've seen on youtube and read Gripen doesn't seem to use flaps when taking off. P.S. I've noticed that the AUX doors are open while spooling [sIGPIC][/sIGPIC]
VireVolte_tigrou Posted January 3, 2009 Author Posted January 3, 2009 In fact, on all full deltas planes (as Mirages, Viggen, F-102, etc...), there aren't any flaps due to elevons using. Elevons downs = pitch down... But today, with fly-by-wire controls and canard configuration, a kind of flaps can be produce : elevons down are balanced by canards... ;) So, on gripen landings, you can see elevons slightly downs and canards up. This will be reproduced on the Gripen 3D model... ;) Then, after watching a lot of pictures and videos, all elevons from each wing seem to work together, and I did not find any evidence canards can work independently...
JaNk0 Posted January 3, 2009 Posted January 3, 2009 Aaah nice spot! Yeah, tried to watch alot pictures and clips. But from what I've seen, it doesn't seem to use flaps when takeing off. http://www.airliners.net/photo/Sweden---Air/Saab-JAS39C-Gripen/1453204/M/ http://www.airliners.net/photo/Czech-Republic--/Saab-JAS39C-Gripen/1425379/M/ http://www.airliners.net/photo/Sweden---Air/Saab-JAS39B-Gripen/1408453/M/ http://www.airliners.net/photo/Czech-Republic--/Saab-JAS39C-Gripen/1399339/M/ http://www.airliners.net/photo/Sweden---Air/Saab-JAS39B-Gripen/1408453&tbl=photo_info&photo_nr=63&sok=keyword_(%5C%27%2B%5C%22Gripen%5C%22%5C%27_IN_BOOLEAN_MODE))_AND_(FIND_IN_SET(%5C%27MILITARY%5C%27%2C_special)%3E0)_&sort=_order_by_photo_id_DESC_&prev_id=1408455&next_id=1408140 [sIGPIC][/sIGPIC]
Bimbac Posted January 14, 2009 Posted January 14, 2009 If you like, I would try to do some research for you.
JaNk0 Posted January 14, 2009 Posted January 14, 2009 Bimbac, nice contribution! :D [sIGPIC][/sIGPIC]
Bimbac Posted January 15, 2009 Posted January 15, 2009 (edited) Bimbac, nice contribution! :D Just trying to be helpful :music_whistling: I am just offering my help. How should I know if it's wanted? Anyway, to business: There are no ailerons or flaps on the wings, just inner and outer elevons. They work mostly together, but it heavily depends on the attitude, altitude and airspeed of the aircraft according to signals from FCS. Canards work both as controls and de-stabilizers. They can move both together or differentially. There are also leading edge flaps which can move up or down. I will try to obtain maximum angles on all controls. The APU doors remain open until the APU itself shuts down when the landing gear is up and locked. After landing when the nose wheel is on the ground, the APU starts automatically. Edited January 15, 2009 by Bimbac 1
VireVolte_tigrou Posted January 15, 2009 Author Posted January 15, 2009 Very interesting, especially about the APU. Then, new animations to provide... Thanks ! :)
JaNk0 Posted January 15, 2009 Posted January 15, 2009 Thanks Bimbac Really enjoy when there are people out there that are willing to give a helping hand ;) [sIGPIC][/sIGPIC]
Bimbac Posted March 3, 2009 Posted March 3, 2009 Information as promised! Please don't ask where I got this :music_whistling: The data goes in the following order: Control surface name, maximum elevation (+ up, - down) and maximum speed of motion. Canards ::: +25° -50° , 56°/s Elevons ::: +30° -30° , 56°/s Rudder ::: 25° both sides, 45°/s LEF ::: +5° -27° , 18°/s Airbrakes ::: max. 54° , 50°/s Only LEF always move symmetrically. I hope this helps :thumbup: 1
JaNk0 Posted March 3, 2009 Posted March 3, 2009 Bimbac, your info is worth alot! Thank you [sIGPIC][/sIGPIC]
Selector Posted March 4, 2009 Posted March 4, 2009 The canards CAN move independently, but SAAB has chosen not to use them to aid roll do to the attripute of stress on the airframe, so they move in unison. The APU will shutdown 12 seconds after take-off and restart at WoW main landing gear (Weight on Wheel, not World of Warcraft). As previusly said, the elevons basicly work in unison, exept in high speed and high wing loading where the outer elevons will deflect more, this is to spread the stress better on the wing. The leading edges is mechically connected and will deflect basicly with the aircraft alfa. 1
VireVolte_tigrou Posted March 4, 2009 Author Posted March 4, 2009 (edited) Fantastic data !!! I will use them with care, even if some should not be fully implemented due to LO limitations... Many thanks ! PS : LEF are "slats" ? Edit : I'm looking for exact capacity of the fuel tanks ! Edited March 4, 2009 by VireVolte_tigrou
Selector Posted March 5, 2009 Posted March 5, 2009 Yes, the LEF is "Leading Edge Flaps" or "slats" The internal fuel capacity is "more than 3000 litres", depends on who you ask. Infact you can "overfill" the tanks and squeese in a little bit more fuel than stated. The external fueltanks takes 1100 litres each
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