Now this is my idea of a back country tailie!
Meet.... "Ze Beast"!
Apologies for the vibrations in the vid, the prop was out of balance from the failed first take-off attempt that ended with a cartwheel and chipped the prop, allow me to digress please :)
Maiden and test there-of, edited two flights of three (1st flight was LOS for trimming out).
I haven't flown for weeks, and haven't flown regularly for 4 years, so please excuse my rusty piloting!
I am in the midst of relocating (again lol) so most of all of my planes and gear are packed away, I had this Trainstar Ascent kit bnib (no electrics), managed to find enough bits and pieces to make this Ascent a little more interesting... I can't help myself ha ha!
Motionsic (TurbineFancy on RC Groups) asked me to test his new pre-production Motionsic BAG pan&tilt so with everything else in storage it had to be this Ascent which is not ideal, being an unknown quantity to test an fpv P&T.
The bits:
DJI HD fpv v1
BadAssGimbal (BAG), by Motionsic (TurbineFancy on RCGroups)
Himax C 3522 0700 700kv
11x7x3 MAS prop
Turnigy Plush 60 amp esc
Turnigy 15 amp ubec
Multistar 4s 10c 4000mah lipo
SN-L Sparrow RTH autopilot
Hitec servos ails/flaps
FMS servos elevs/rudder
Main gear ally plate: Volantex 1400mm Decathlon
Wheels: Grand Tundra (I think!)
First flight not recorded, purely LOS for trimming etc.
Following two fpv flights were edited for this video.
Good news is, theMotionsic BadAssGimbal worked perfect. No mods, literally hotglued to a lump of eps foam for lightweight height, plugged in and it works as seen in this video. Near 360 deg pan rotation, silky smooth Savox servos, and a brilliant captive tray for the DJI air unit. Hands down the easiest turn key solution for an fpv pan & tilt, particularly for DJI HD fpv with Air Unit.
I need to trim the screws, looks like a torture chamber in the cockpit lol
Also need to find a way for more tail authority, rudder/ tail wheel aren't very effective, slews on take-off and slews badly on landing rollout, no matter how much counter rudder input I give. Might be the nose up attitude with the big wheels, perhaps flattening the main gear to lower the nose?
The motor was a challenge due to the nose being a motor mount integral with the plastic fuselage. The only motor I had in my parts bin was this Himax the mounted on the base of the motor with the shaft protruding, really frustrating setup.
First maiden flight attempt was LOS to trim out etc but didn't get off the ground, the rudder clevis failed on roll out which resulted in a cartwheel... but to my surprise all I ended up with was rashed wingtips and a chipped prop! Unfortunately the chipped prop was now out of balance but the show had to go on! The vibrations didn't seem that bad but certainly wreaked havoc with the dji cmos camera, I am wondering if the motor being mounted into the plastic fuselage nose may be amplifying the vibrations to some extent, I'll experiment more later but I do have a suspicion I might need to make a solid firewall at the fwd end of the battery tray and cut the nose off to form a cowl.
The following two fpv flights I took off LOS, I don't know the plane well enough yet to take-off goggs on with a row of pine trees on either side of the narrow-ish track lol
Also she is a little more nose heavy than I would like, STOL landings won't be possible until I can achieve a more rearward cg, may have to go to a smaller 4 cell lipo, really trying to avoid 3 cell (larger diameter prop).
The MFD lol, the LCD display on the dash is a de-cased pocket GPS, this is new and for whatever reason wouldn't play nicely at all, need to play with that as well. But glad to see it is surprisingly readable in the goggles.
The DJI Air Unit will need a fan, even though it is well exposed to fresh air, at 700mw it comes down hot.
The SN-L Sparrow autopilot worked a charm, I pretty much only fly manual but I tested rth and it was flawless.
I need to do more stall tests, find the sweet spot for flap settings, and maybe experiment with the main wing to try improve the boundary layer.
DJI HD fpv worked flawlessly but now I am limited by my stock 2.4ghz FrSky, I may have to swap to Dragonlink.
The Turnigy ubec has 4 convenient LED's to indicate approx lipo volts, as seen lower right beside the flight lipo. Not perfect for battery monitoring but better than nothing.
Everything is powered by the one flight lipo, rc receiver/ SN-L ap/ MFD/ Ubec/ DJI all powered off the lipo balance lead, tapping into 3 cells.
The two switches on the right beside the door cutout, fwd switch is power cut to the rc receiver/ SN-L ap/ MFD... the aft switch is power cut to the DJI Air Unit, handy if the AP or MFD is taking time to aquire satellites so the AU isn't overheating (I'll install a cooling fan on the AU).
I'm looking forward to log some more flight hours with this Beast, has some promise to be a lot of fun, possibly more fun than the Volantex Decathlon... and that was a hoot!
Негізгі бет Ғылым және технология Volantex Ascent maiden 12092021
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