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« Reply #50 on: December 05, 2014, 09:56:31 AM »
sanjayrai55
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Read this radiocraft:

I used 2 mm lite-ply for doublers.

The main landing gear bock- I have tried to design this so the impact of landing is transmitted over the largest possible area on the fuse

The ply doublers are glued with SR 998

The butt and fillet joints are glued with hot glue

Fuse & tail feathers 4 mm

Did not have yellow 4 mm corro for tail feathers so covered with thin vinyl (it comes in different varieties)
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« Reply #51 on: December 05, 2014, 05:45:49 PM »
sanjayrai55
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sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.
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Main LG installed with 3 mm Allen Bolts

http://s25.postimg.org/9etaoorlr/20141205_091658.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #52 on: December 05, 2014, 05:47:44 PM »
sanjayrai55
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sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.
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Don't wake a Tiger until you've factored the teeth



Wheels fitted with 4 mm axles & wheel collars

http://s25.postimg.org/r7euwk8u7/20141205_091711.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #53 on: December 05, 2014, 05:49:25 PM »
sanjayrai55
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sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.
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Pilot thrown in for luck  Giggle Giggle

http://s25.postimg.org/q6em7frun/20141205_091643.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #54 on: December 05, 2014, 05:54:23 PM »
sanjayrai55
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sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.
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I used 2 3/4" (70 mm) main wheels, and will use a 30 mm Tail Wheel

Wing mark-out started

In this build, adapting from a balsa design to corro, the rough break-up of time spent:

Conceptualization, calculation, planning: 40 %
Marking:                                           20 %
Building:                                           40 %

http://s25.postimg.org/pr3cef5xb/20141205_114626.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #55 on: December 05, 2014, 06:43:49 PM »
maahinberi
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This is going to be a beautiful bird. Very detailed build log Clap Clap
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Maahin Beri - Introduction and Hangar
Seagull Arising Star, Seagull Low Wing 40, AviSport (SPAD), Phoenix Scanner, VortexRC Speedster, Martian 220 Racing Quadcopter.
 

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« Reply #56 on: December 05, 2014, 07:09:32 PM »
sanjayrai55
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sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.
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Thanks Maahin Cheesy

Beauty as they say lies in the eyes of the beholder  Wink Wink

As for me - I just hope it flies  Huh? Huh? Embarrassed Embarrassed
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« Reply #57 on: December 06, 2014, 02:16:20 PM »
aman1256
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Blackbird!!!



Have to say sanjay sir your a master in building planes no matter what you can create any plane !!! Cheesy
SaluteSaluteSaluteSalute.
Regards,
Aman. Hats Off
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« Reply #58 on: December 06, 2014, 07:36:38 PM »
sanjayrai55
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Thank you Aman  Thanks

The dihedral for the wing is not specified  Huh? Huh?

So, I found the dihedral brace in the drawing, and by extending the arms found the angle was 15 degrees, which translates to approx. 3.3" per side  Roll Eyes Roll Eyes Shocked Shocked Shocked

I decided to go with 2" per side. More dihedral makes the model easier to flt - the ''bell'' effect - but less nimble and aerobatic. Seeing it's a scale model of a trainer (although a low-winger) decided to settle midway  Grin

http://s25.postimg.org/ibd9k3wzj/20141205_203638.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #59 on: December 06, 2014, 07:38:52 PM »
sanjayrai55
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The wing is:

Swept back at the LE
Swept forward at the TE
Tapered

Made the spar first. Used 9 mm balsa (because I had it  Wink Wink ROFL)

http://s25.postimg.org/cbpiggc73/20141206_135659.jpg
Scale PT-19 25 size in Corro/Electric

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« Reply #60 on: December 06, 2014, 07:40:28 PM »
sanjayrai55
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A fair bit of geometry to get the loci of the wing boundaries

http://s25.postimg.org/mhy3zfwlb/20141206_135815.jpg
Scale PT-19 25 size in Corro/Electric


http://s25.postimg.org/m6gnmog5b/20141206_185633.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #61 on: December 06, 2014, 07:43:38 PM »
sanjayrai55
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sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.
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I leave the wingtips open, or make a tip block in thermocole for most of my corro builds. This guy demanded a built up tapered wingtip. So, here goes; let's try and explore what happens  Huh?

http://s25.postimg.org/n1378pnzz/20141206_185639.jpg
Scale PT-19 25 size in Corro/Electric


http://s25.postimg.org/sb860088v/20141206_185735.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #62 on: December 06, 2014, 07:44:37 PM »
sanjayrai55
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http://s25.postimg.org/6eq8ddkfz/20141206_190056.jpg
Scale PT-19 25 size in Corro/Electric


http://s25.postimg.org/srxz06ldr/20141206_190102.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #63 on: December 06, 2014, 07:49:45 PM »
sanjayrai55
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The aileron is made from 2 pieces of 3 mm corro glued together. Then one side flute top and bottom is cut away to make the hinge. I would have preferred just a single 4 mm, but did not have it in yellow  Angry

The wing itself is 3 mm Corro (actually 2.6 mm as measured)

http://s25.postimg.org/pmdd9z2rj/20141206_190117.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #64 on: December 06, 2014, 08:14:35 PM »
maahinberi
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By when do you plan to maiden this? Hopefully, I'll be around when you do  Roll Eyes
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Maahin Beri - Introduction and Hangar
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« Reply #65 on: December 06, 2014, 08:48:17 PM »
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Sanjay sir  how much she weights now? Power plant confirmed (Will go with a 3536-1250 probably with a 10*7 eProp) or not?
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Spektrum dx9,Turnigy 9x,walkera,HK t6, Skysurfer v3,yak 54 3d,custom made Tricopter,HK Parafoil,Hausler 450 heli,hiller hover 450 heli,Ornithopter,
 

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« Reply #66 on: December 06, 2014, 08:58:36 PM »
sanjayrai55
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Maahin: It should be ready for the next weekend of 13/14th Dec. However I am travelling on the 11th evening (the day you reach) and back on the 14th morning
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« Reply #67 on: December 06, 2014, 09:02:20 PM »
sanjayrai55
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Shijin: Until the wing is ready, I won't really know

But these are my rough estimates:

Fuse with tail: <600 gm
Wing: < 400 gm
Power Pack: ~450 gm

Total: 1350-1450 gm

If it's below 1400, the 3536-1250 (about 20 size) is OK, else I might go with a 3542-1250 (about 25 size.)
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« Reply #68 on: December 06, 2014, 09:04:59 PM »
sanjayrai55
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http://s25.postimg.org/vd3jnparj/20141206_203656.jpg
Scale PT-19 25 size in Corro/Electric


http://s25.postimg.org/vd3jnparj/20141206_203656.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #69 on: December 06, 2014, 09:05:47 PM »
sanjayrai55
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http://s25.postimg.org/kozsov0sf/20141206_205235.jpg
Scale PT-19 25 size in Corro/Electric
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« Reply #70 on: December 06, 2014, 09:27:50 PM »
maahinberi
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So, are you flying on 14th? Or the Wednesday after?
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Maahin Beri - Introduction and Hangar
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« Reply #71 on: December 06, 2014, 09:40:08 PM »
sanjayrai55
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Not sure. But will inform you
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« Reply #72 on: December 06, 2014, 11:07:11 PM »
girishsarwal
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coming up very well chief
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« Reply #73 on: December 07, 2014, 06:43:59 AM »
sanjayrai55
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sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.
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Re:

Thanks Girish. We should be flying it soon. Hope it flies Cheesy
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« Reply #74 on: December 07, 2014, 07:35:44 PM »
sanjayrai55
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sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.
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Cut-outs for wing servos. Used 10 g MG TGY

http://s25.postimg.org/kf1xgdhvj/20141207_062348.jpg
Scale PT-19 25 size in Corro/Electric
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