Killing it with the 8S JAS-39 Gripen! ✈️ Mad Thrust Vectoring Flights!
23See me perform some really cool extreme aerobatic maneuvers with my 8S modded Freewing JAS-39 Gripen RC Plane, taking advantage of the thrust vectoring nozzle but executed with precision and confidence! ^^
The Gripen really shines when there's no wind, and now that I am more used to it, I am capable of pulling some really crazy figures that I struggle with on other jets. On the downside, the pitching rate, energy retention and flight time of this jet are much worse than most others rc jets I fly, so that poses some challenges. Additionally, controlling the inertia on the spinning maneuvers can also be tricky as the jet demands a lot of 'encouragement' to stop ongoing maneuvers, but once you get the hang of it, you can do amazing stuff! :D
These were flights 145th to 149th on 'Jana'.
Pilot: RC4ever
Ground video: Luis Ibáñez
Airfield: Club Els Cards
SPECS (Reflecting my setup):
Model Scale: 1/9th
Wingspan: 882mm
Length: 1613mm
Weight: 2350g (w/o batteries)
TOW: 3400g
*CG: 40mm aft of factory recommended position (molded into the wings)
*Current CG is temporarily more nose heavy.
Material: EPO
Motor: HET-1865kv inrunner motor (added as a mod)
EDF: 9-blade 80mm Jetfan (added as a mod)
ESC: Freewing/Hobbywing Flyfun 150A 8S (added as a mod)
Servos: Stock servos on the canards, ALZRC DS452MG on TV yaw, JX servos on elevons, rudders and TV pitch. (added as a mod)
Landing Gear: Electronic retractable w/ aluminum trailing link struts
Receiver: FrSky X8R (user choice)
Gyro: Hobby Eagle A3S3 (added as a mod)
Canards gyro: GWS PG-03 (added as a mod)
Separate UBEC: Freewing 8A (added as a mod)
Receiver battery: Rhino 2S 610mAh (added as a mod)
Main battery pack:
- HRB 2x 4S 4200mAh 60C
- Turnigy Nanotech 2x 4S 3300mAh 70C
The jet is powered with an upgraded 8S 80mm Jetfan EDF with a 1865kv HET motor. I had to cover the cheater hole with a mosquito net to protect my expensive investment from an otherwise inevitable FOD considering the conditions of my gravel-dirt runway so the jet isn't even displaying it's full thrust potential. This obviously has an effect on performance and current draw. Sadly this setup is too amp hungry and can only get two and a half to three minute flights with throttle management and 3Ah packs. The batteries also struggle to deliver the amps, despite being Panther packs that are pretty heavy/capable. Overall the Jetfan is indeed an improvement in performance over stock setup, but the short resulting flight time kinda defeats the purpose, need to go to higher capacity batteries, and using lower-C packs to keep the weight in check.
More setup details:
https://www.rcgroups.com/forums/showpost.php?p=46318505&postcount=2099
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