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Nov 07, 2010, 10:26 AM
Phlathead
ToxicToast's Avatar
Discussion

Skyburners Micro Yak R2 (added video)


Had trouble really determining which forum to post this.... but I think the types of readers of the F3P could appreciate this more than some of the other forums here at RCG.

I've developed and cut a micro Yak-5x style plane that attempts to combine 3D/pattern character into one. Since it is practically impossible to fully exploit both characteristics in the same plane, a fun micro/near micro plane for indoor use that can go mild to wild and feels like a larger plane is the result.

SPECS:
  • 23.2"/588mm WS
  • 25"/640mm
  • AUW: 80g
  • Dry weight: 66g
  • Hyperion 25c 2S 180: 13,6g
  • Alternate is the TP Pro Lite v3 250 2s (17g)
  • 3 2.5g servos micro jst (unmarked-ebay)
  • AR6300 used with DX6i
  • Pentium 6A ESC
  • HobbyKing 18-11 2000kv Micro Brushless Outrunner (10g) ** see note below
  • 1306N 2200kv 9gr Brushless
  • GWS 5030 prop
  • GWS 6030 prop
  • 3mm EPP doubler CNC cut
  • 3mm Depron milled CNC cut
  • Radical RC biased servo horn RRCF3PBSH2
  • UHU-POR and Mercury Foam Safe assembly.
  • Gorilla White on the doubler and epoxy to mount the lite-ply motor mount
Please forgive me if it seems like I am showing off, this plane is awesome for its size!
Last edited by ToxicToast; Nov 30, 2010 at 09:38 AM. Reason: corrections and additions
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Nov 07, 2010, 08:16 PM
Registered User
Nooflyer's Avatar
Neat!
Nov 08, 2010, 07:49 AM
Registered User
Looks great! Love to see some video of it flying.
Nov 08, 2010, 04:58 PM
Phlathead
ToxicToast's Avatar
Working on it! Weather hasn't cooperated lately and the next indoor wont be for a few weeks. Thanks for the feedback!
Nov 21, 2010, 11:12 PM
Phlathead
ToxicToast's Avatar
Skyburners Micro Yak (4 min 53 sec)

Managed to shove the sticks to a FB so I could video!

Swapped the 18-11 2000kv with the GWS5030 out and put the 1306N 2200kv 9gr on it. Made quite a difference in performance. The 2000kv showed its inefficiency shortly into flight and had to use 90% throttle to break hover. The 2200kv on a 6030 did a great job at maintaining thrust and have head room left over for punch out, even after 5 minutes of flight time! Definitely recommend the 1306N for this weight class.


http://www.hobbyking.com/hobbyking/s...idProduct=8295
Last edited by ToxicToast; Nov 23, 2010 at 07:50 AM. Reason: Fixed link
Nov 23, 2010, 04:50 AM
Looks sweet!

Btw the link doesnt work
Last edited by wishawhunk; Nov 23, 2010 at 04:55 AM.
Nov 23, 2010, 07:50 AM
Phlathead
ToxicToast's Avatar
Thanks. Fixed the link.
Nov 24, 2010, 05:06 AM
RIP Azarr - "Old age is not for sissies"
Azarr's Avatar
Nice job! I love the Yaks. FWIW, I've been running the 18-11 with the GWS 7x3.5 for over a year now without a problem. I really like the combo.

Azarr
Nov 24, 2010, 08:40 AM
Phlathead
ToxicToast's Avatar
Azarr, thanks for the info. I'll give that combo a try. Tried two 18-11s on this plane, both <80gr and on the gws5030. Its great the first minute or so-then the power starts to sag and hucking it takes almost all the throttle. Thought it was my packs not keeping up with the demand but I put on the TP Pro Lites 250 and they still getting the same problems. I suspect it is the motor inefficiency. The bell gets warm, not hot. The 1306 gives a great 6 minute flight and still had headroom on the throttle at the end.

I'll try your prop settings soon. Thanks!
Nov 24, 2010, 03:53 PM
RIP Azarr - "Old age is not for sissies"
Azarr's Avatar
Quote:
Originally Posted by ToxicToast
Azarr, thanks for the info. I'll give that combo a try.
I'll try your prop settings soon. Thanks!
That's funny, because now you have me wanting to try the 1306N. There's just no end in this hobby

FWIW, I'm running the Hyperion 2S 240's on that motor.

Azarr
Nov 24, 2010, 04:20 PM
"Because I was pǝʇɹǝʌuı"
bighead93's Avatar
I got to fly it and it is awesome!
Nov 24, 2010, 04:58 PM
Registered User
Very NICE!!!! Are u selling these, if so how much
Nov 28, 2010, 08:20 AM
Phlathead
ToxicToast's Avatar

Now with an 80's twist!


I just finished a second Yak. Similar configuration as before but this time 3.5gr servos and the Orange RX 4ch receiver. I wanted to use what I had available in spare parts and wanted to experiment with the weight and setup. I also eliminated the center spar and used 1mm CF flat on the leading edge, which seems to produce similar strength and stiffness. Also, a carbon truss (.035) along the spine to try and stiffen the tail, which was twisty when snapped or rolled at speed. Overall, this put the weight up a bit to 82.4gr with battery.

@mnovotny: PMd

@bighead93: Thanks!
Last edited by ToxicToast; Nov 28, 2010 at 09:34 PM.
Nov 28, 2010, 11:46 PM
"Because I was pǝʇɹǝʌuı"
bighead93's Avatar
It was great to see the new pink model this morning! Can't wait to get my own!


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