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Mar 08, 2013, 04:37 PM
"Get off the runway!"
Da Big_G's Avatar
Quote:
Originally Posted by ParkJeff
Nice looking bird. Perhaps a good replacement for my Helios 63e. Do you think these Hitec servos will fit? http://www.hobbyking.com/hobbyking/s...idProduct=9813
They will be a tight fit...but look close. Maybe a little trimming.
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Mar 08, 2013, 06:35 PM
Birds do it, bees do it
ParkJeff's Avatar
Thanks. Looking forward to your build.
Mar 09, 2013, 01:28 PM
"Get off the runway!"
Da Big_G's Avatar
About done. Just waiting for the servos to arrive..

Update: Just finished the build, less servos. Plugged in the weight of the servos and the plane weighs (less LiPo) 2299.15 grams, about what HK said it would (2300 grams). I am impressed! With a Turnigy 6S/3000ma. pack, the AUW is 6.22 lbs. Perfect. The motor I am using (Turnigy SK3-5045-500Kv) is out of my HK Katana, which, btw, came out at least 1.5 lbs. over advertized weight. As soon as the servos arrive, I'll give an initial flight report.
Last edited by Da Big_G; Mar 09, 2013 at 07:26 PM.
Mar 10, 2013, 12:52 AM
Birds do it, bees do it
ParkJeff's Avatar
Quote:
Originally Posted by Da Big_G
The motor I am using (Turnigy SK3-5045-500Kv) is out of my HK Katana, which, btw, came out at least 1.5 lbs. over advertized weight. As soon as the servos arrive, I'll give an initial flight report.
Did the screw holes on the backmount cross of the 5045 fit the blind nut positions on the firewall or did you have to modify that?
Mar 10, 2013, 09:57 AM
"Get off the runway!"
Da Big_G's Avatar
Quote:
Originally Posted by ParkJeff
Did the screw holes on the backmount cross of the 5045 fit the blind nut positions on the firewall or did you have to modify that?
They were a little off, so I slotted them about 1/16 inch and used lock nuts instead of blind nuts. If this motor works out, I'll convert to blind nuts.
Mar 10, 2013, 10:26 AM
Birds do it, bees do it
ParkJeff's Avatar
Thanks. Not sure whether to go with the 5045 or the 5055. Hope the 5045 works out as it's a fair bit lighter.
Mar 10, 2013, 10:55 AM
"Get off the runway!"
Da Big_G's Avatar
Quote:
Originally Posted by ParkJeff
Thanks. Not sure whether to go with the 5045 or the 5055. Hope the 5045 works out as it's a fair bit lighter.
It will be close. I like the 5045, but the 500kv might be just a tad low. Prop calc. shows it to be good for 89-91 mph in this combo, but I think it's too optimistic. Tested the static thrust tonight with a 13/10 prop...7lbs,12oz. I'll check rpm's and amp draw tomorrow.

Amps are 48.8 @ 4.02-4.03 volts/cell (resting). Watts were 1,083.36. 173w/lb. So far, so good. Seems to have a warp in the left horizontal stabilizer..a little wash-in. May try heat to un-warp it.
Last edited by Da Big_G; Mar 12, 2013 at 10:37 PM. Reason: added data
Mar 16, 2013, 10:42 PM
"Get off the runway!"
Da Big_G's Avatar

Airoso


Should maiden tomorrow
Last edited by Da Big_G; Mar 17, 2013 at 09:52 AM.
Mar 17, 2013, 08:12 PM
"Get off the runway!"
Da Big_G's Avatar

Maiden flight


Well, the Airoso has maidened. Never have I flown a plane that flew so neutral after a build. Negligible roll or pitch coupling. C/G was close. Looks like no mixing will be necessary! The power plant is perfect, (Sportsman maneuvers are no sweat) with the motor temps. after 4+ min. flights 95* on a 85+ degree day! The 3000 ma. pack was warm, going down to 18%. I will upgrade to 4000 ma. packs, giving me a safe 5 to 5-1/2 min. full throttle flights. The landing gear is a weak point, however. Any bump at all and the gear will bend. I will seek out a carbon fiber substitute. One of my club fellow flyers took a video of the maiden. If it's available, I'll add it here.
Mar 18, 2013, 05:58 AM
Birds do it, bees do it
ParkJeff's Avatar
Well done! I hope the bigger pack will not make it nose heavy but other than that, it sounds good. Great job.
Mar 18, 2013, 08:03 AM
"Get off the runway!"
Da Big_G's Avatar
Quote:
Originally Posted by ParkJeff
Well done! I hope the bigger pack will not make it nose heavy but other than that, it sounds good. Great job.
Balance won't be an issue. How are you coming along with yours?
Mar 18, 2013, 09:03 AM
Birds do it, bees do it
ParkJeff's Avatar
I am still sitting on the fence as something else has caught my eye. It's hard when there are several attractive choices and only limited time to build.
Mar 18, 2013, 11:56 AM
"Get off the runway!"
Da Big_G's Avatar
Quote:
Originally Posted by ParkJeff
I am still sitting on the fence as something else has caught my eye. It's hard when there are several attractive choices and only limited time to build.
I know what you mean. For me, I'm happy with my choice. It feels so comfortable in the air.
Mar 19, 2013, 09:13 AM
Registered User
Great job! Looking forward to see the video.


What about these TGY-390V HV Metal gear Servos you used, are they any good?
Mar 19, 2013, 09:54 AM
"Get off the runway!"
Da Big_G's Avatar
Quote:
Originally Posted by RC_Fred
Great job! Looking forward to see the video.


What about these TGY-390V HV Metal gear Servos you used, are they any good?
Those servos are great. Fast, strong and center very well and tight. They were a little small for the factory cut-outs, I had to add balsa filler to achieve a solid mount. I have since installed some new Hitech HS225's. They are not digital, but they are just as fast.


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