RC Models => Electric Planes => Topic started by: kiran rc on June 19, 2015, 05:34:33 PM
Title: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 19, 2015, 05:34:33 PM
My 2nd model out of high density thermocol. Same as the skysurfer model. Specification 24inch wing span 2cell 350 mah lipo Rcx 2400 kv brushless 2.5-5g servo (2)
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 19, 2015, 09:28:20 PM
Started the build. Cut fuselage out of 1inch thermocol. :)
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 19, 2015, 10:07:15 PM
Joined both the sides of the fuselage with some white glue and carved out the edges :)
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 19, 2015, 10:23:49 PM
Sanded edges. ;D
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 20, 2015, 10:28:55 AM
Right wing made out of 1inch thermocol and sanded.
Title: Re:
Post by: docnayeem on June 20, 2015, 10:35:18 AM
Great work ...
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 20, 2015, 11:55:33 AM
:thanks:
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 22, 2015, 07:55:19 AM
Covering with tissue and 1:1glue and water. ;D
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 22, 2015, 04:52:50 PM
Took a little long to dry. Sanded after covering.
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 22, 2015, 05:42:38 PM
Fixed 3.7g servo using foam and hot glue. The push rod is passed through a plastic tube
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 22, 2015, 05:46:20 PM
Motor with mount. Will be using a 15amp esc with 5x3 prop ;D
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 22, 2015, 05:57:32 PM
Mounted the 15amp esc. :)
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: rastsaurabh on June 22, 2015, 06:08:49 PM
Very good going Kiran....
Before you mount motor have toothpicks on both side of ESC & ensure you stick the mount with those toothpick heads in Mount... this will give some strength to the mount.
I made a bigger version some years back ..... http://www.rcindia.org/electric-planes/scratch-building-a-look-alike-of-axn-floater-or-fms-800-or-easystar/msg109766/#msg109766
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 22, 2015, 06:13:08 PM
Thanks.Saw yours long back. :goodjob: Already mounted the motor. Will give it carbon or wood reinforcement
Motor mounted.
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: rastsaurabh on June 22, 2015, 06:28:10 PM
how are you planning to put wings??
cant make out from pic but Motor thrust angle seems too high... will be clear once you put wings.
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: rcpilotacro on June 22, 2015, 07:27:52 PM
+1. Down angle is too much, she will slam the ground
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: K K Iyer on June 22, 2015, 08:18:44 PM
@kiran rc, Been following this build, but refrained from commenting so far, as it looked so rough that i told ashok baijal yesterday that this can't be the same guy who built that beautiful micro Champ! It looks far better now that you have sanded it... Suggestion: make 2-3 motor mounts with different amounts of downthrust. Attach with rubber bands to toothpicks pushed through the pylon/cowl. You may be surprised that zero may be the best angle...
Below is a comment actually related to your build, and not an attempt to hijack your thread. A response from Gusty will be of immense use to you (and to me ;D)
@rcpilotacro Never seen a full size power pod with the kind of downthrust the Skysurfer has. Is it so that the thrust line can pass through, or be close to the CG? Or the centre of drag? Is it a safety device for newbies? Basically why this massive downthrust on power above and behind the wing? Indore, like many other places, awaits your RC pilgrimage...
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 22, 2015, 09:26:48 PM
@KK Iyer, perhaps you are right. I spent a little time on the angle and found that its a little to much. I might replace the motor too. Cause it only gives about 100g of thrust with a 2 cell. Planned to extend the mount keep the angle. The problem is all about propeller. I cant use a smaller prop less than 5".A4.75" prop will drastically reduce the thrust. :(
The champ is my favourite as I spent quite a lot of time working on it. This is my first thermocol build. This thermocol is not rigid and very tough to sand. Very bad experience with thermocol. This material is no match to depron. I have build more than several models with depron and this is my first one with thermocol. Will never use thermocol. Now the advantage of this material can only be known after the first flight.
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 23, 2015, 12:08:38 AM
Angle of thrust. Rough comparison against original.
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 23, 2015, 07:53:34 PM
Painted it yellow. ;)
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 23, 2015, 08:51:16 PM
Canopy and painting finished.
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: K K Iyer on June 23, 2015, 09:20:20 PM
What's that gap in the middle of the rear fuselage?
Title: Re: Mini foam surfer build for 6th RcIndia sweepstakes
Post by: kiran rc on June 23, 2015, 11:13:32 PM