RC India

RC Models => Electric Planes => Topic started by: rahulroy31 on July 04, 2022, 10:56:50 AM



Title: Joker-Plank wing
Post by: rahulroy31 on July 04, 2022, 10:56:50 AM
A 1m span plank wing which I named Joker  :)


Dimensions and details :-
Span = 1000 mm
Root Cord = 265 mm
Tip cord = 175 mm
Sweep = -25 mm (slight forward sweep)
Wing area = 220000 mm^  or 22 dm^
Airfoil = Phoenix mod (85% thickness)
Elevon = 25 mm cord Full span elevons
Vertical tail = 136 sq cm

Electronics
Motor = 2206 200KV
Prop = 7x4
Bty = 2S 1000 mah

CG - 30 mm from the LE at root cord  / 55 mm from LE at the wing tips...

AUW = 310g,  Wing area = 220000 sq mm, Wing Loading - 4.65 oz/sq ft, Wing cubic loading - 3

The wing is hotwired from EPS (Thermocole). It has a built-up 10mm CF tow spar  and skinned with 32 gsm fiberglass at 45 degree bias. the wing tips are EPP . The fuselage is only in the front portion to house the ESC, RX, Motor and battery.. The vertical tail is stuck on a 3 mm CF rod and glued to the wing TE... I had put the silver strip on one wing thinking it will help in visibility.. it does not help much.
Need to be very careful to get the correct CG, even a couple of mm difference changes the characteristics drastically. I have put 40% expo in elevator.. Once trimmed she thermals well without much inputs without much inputs.. and turns are very tight without loosing height

Here is a a flight video https://www.youtube.com/watch?v=s7lBZY6r_bI


Title: Re: Joker-Plank wing
Post by: pmahure57 on August 27, 2022, 08:35:34 PM
are you selling ?


Title: Re: Joker-Plank wing
Post by: rahulroy31 on August 29, 2022, 07:33:28 AM
No.. not yet 🙂




Title: Re: Joker-Plank wing
Post by: manojswizera on September 06, 2022, 11:09:05 AM
Beautiful model.

Where you find 32 GSM fiberglass ?


Title: Re: Joker-Plank wing
Post by: rahulroy31 on September 08, 2022, 09:28:28 PM
From banggood.. during good old times.




Title: Re: Joker-Plank wing
Post by: rahulroy31 on September 08, 2022, 09:37:44 PM
Last Saturday had beautiful thermal flight..a 22.6 mins total flight time with 1.2 th% (Opentx throttle percentage)..




Title: Re: Joker-Plank wing
Post by: rahulroy31 on January 03, 2023, 01:10:29 PM
here is another video ..  thermal soaring    https://youtu.be/AkRjh4RjzFU


Title: Re: Joker-Plank wing
Post by: sanjayrai55 on January 04, 2023, 09:19:40 AM
Lovely  :thumbsup: