|Jan 21, 2014, 08:42 PM|
Pitts Special FPV setup,specification and statistic performance:
My Pitts running on these hardware inside (Pitts is stock setup):
-ARKBIRD GPS/OSD/RTH module
-FrSKY Telemetry 8ch with diversified "di-pole" modded antenna.
-HXT900 180 degree mods for camera panning mechanism
-5A/5V HK micro UBEC for power control hub
-808 #16 HD cam with D-lens (120 deg) + video output capable.
-5.8ghz 200mw boscam video transmitter (11.1v) + Clover leaf DIY tuned antenna.
-Durafly ~12" x4 blade props.
-2200mah 3s 25c lipo
-Turnigy 9XR + Frsky 2.4ghz telemetry module + 5dbi Patch Directional antenna
-5.8ghz video receiver + 8dbi Patch Directional antenna .
-Boscam AIO video goggle with head tracker.
Center Gravity (CG distribution)/hardware placement:
-Nose cone: BEC+ESC+current amps sensor in v2 build but eliminated in V3 new build.
-Front lipo compartmentg/tray: none.
-Rear compartment/tray between landing gear: 45 deg 2200mah 3s 25C insertion + upside down 5.8ghs video transmitter.
-Inside fuselage between center upper wing struts: GPS module
-Inside fuselage Below cockpit and behind/above aileron servo: ARKBIRD GPS/RTH/OSD module.
-Inside fuselage behind wing: Frsky telemetry receiver.
-Cockpit end: 808 #16 cam + HXT900 180deg mods servo.
-25~35 minutes of fligh time (at high altitude ****...can't tell how high due to sensitivity issue. *wink* *wink*)
-7km A-B distance flight range (14km fro and return trip) CL + SPW antenna
-12km max A-B distance flight range (24km fro and return trip) 5~8dbi patch antenna on both.
-Min speed before stall speed at high altitude: 15/25km with 20% throttle on 4 blade hard/composite prop.
-Full flying weight: 780~820gram.
My version 3 Pitts build is based a replica setup from my successful 960mm Art-tech P-51D Mustang. Known as the internet first successful scale FPV flight over long range and height based on size to weight ratio and first scale place to accomplish impossible P-51D cockpit flight. Replicating the same hardware setup and weight distribution now the Pitts only winspanned at 860mm can defeat any high performance long range home made UAV/glider.
Here my youtube of ART-TECH P-51D Mustang flight. Will soon publish Pitts V3 cloud video soon. My youtube have some FPV Pitts video to but mostly version 1 (that have crappy DVR like video quality) and version 2 build (low altitude flight).
Reference builds and gallery:
You can visit my website where i publish my planes and stuff..mostly bunch of ART-TECH planes and parkflier sized, i think thats enough to summarize everthing.
Click here - Pitts V1/V2/V3 FPV builds and gallery
ART-TECH Pitts rocks!..ehemm i'm not their salesman just a big fan of their planes. It flies soo goooddd
|Jan 21, 2014, 09:23 PM|
Yes, highly recommends because i have 6x running active on various scaled flying platform. It can easily and autonomously compensate various type of wings, frame sizes, flight condition, rough winds and never failed to return home or way point flight. It has all necessary feature you need for safe flight. Arkbird have higher end features just like big brother like the Hornet/Feiyu and other high end AP and less messy than APM 2.5 (Ardupilot). Put many hours under wet weather and even fall into the ocean, still runs well till today.
|Feb 01, 2014, 04:50 AM|
Okay, here the video of my HK/Art-tech Pitts Special flight over the clouds on FPV, please get an extra pants later.
|Feb 07, 2014, 05:08 AM|
It's Finally Arrived
Well after a 4 month odyssey where my plane travelled around the world courtesy of Singapore Post, the HK Pitts has finally arrived (dispatched 4/10/13 arrived 7/2/14). Having been a keen follower of this thread I am now extremely anxious to get this little bird assembled and in the air. Thanks to all who have contributed to this thread as I'll be able to make the mods and adjustments without having to learn the hard way. Will maiden it on Sunday morning with my flying buddies and report back.
|Feb 09, 2014, 01:24 PM|
Well it came down in one piece but I must say I am a little disappointed. She popped up into the air with relative ease and from there on I had to keep the throttle over 3/4 just to keep her there. Batteries are 3S 1300 35C with stock prop. The only thing I can think of is that I live at altitude (roughly 4000 feet) and so i'm not getting the bite out of the prop. Anyone got any suggestions that will help with the lack of power.
|Feb 09, 2014, 01:53 PM|
change the prop, I had the same thing 3/4 throttle to fly, with lackluster performance. she's a different bird with a 10x7 or 10x8 prop, just make sure you get a slow fly prop, not a standard e prop or it will be similar performance
|Feb 09, 2014, 02:35 PM|
|Feb 19, 2014, 04:07 AM|
Joined Jan 2014
Thought I'd share my experience with my new Pitts.
Came with the 4.7 prop and I flew couple of flights with that. It flew OK but seemed a bit slow and lacklustre.
I got the Parkzone 10x8 prop after reading this forum.
I've just come back from couple of flights with it and wow, it really is a much much better plane. Instantly my favourite, can't wait to take it out again. Tearing around the sky, responds beautifully to all controls.
Mine is stock apart from prop. I am flying stunts but sensibly, not trying to do tiny loops from a dive to snap the wings off. I might consider adding spars, but I'll see.
I fly with Overlander 1350 in front battery hatch. I glued a little square of foam at top of fuselage to stop battery slipping back into the void. After 8 min flight batteries are 11.4 V. With the new prop, 75% throttle is enough most of the time.
I use the bit of ribbon taped to bottom of battery and what I do is close the hatch with the ribbon poking round the sides of the hatch. I then can pull the ribbon round the front of the hinges and can tie a simple knot. Should at least help it hatch comes loose.
I initially had the problem of the plane climbing too much on hard throttle, but I screwed the elevator adjuster in so there is a slight amount of down. It now seems to fly level at all throttles so I'm going to leave it at that.
I change aileron throw to outer hole for max movement. Rudder is on middle hole and moves fully each way. Elevator is on outer hole and seems to have plenty of movement so I'll leave it at that.
Great little plane!
|Feb 24, 2014, 01:45 PM|
Joined Jan 2014
Just added carbon fiber strips to wings.
5mm x 1mm x 800mm.
I put them under top and bottom wings.
Top one I did first, using a hot blade - went OK but the blade cut quite a big channel.
Top wing fitted it a couple of cm back from leading edge, following curve.
On the bottom wing I used a very sharp blade and cut down to 5mm. This spar just pressed in, and a bit of CA and kicker to make sure it stays. This one was dead straight along middle of wing.
Both wings rock solid now. Gave it a test fly today and flying great. My fav. plane for doing acrobatics. Handles wind really well.
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