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« on: July 02, 2015, 01:29:23 PM »
ashok baijal
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While the Airboat build is progressing albet slowly, I am now attempting to build a Rogallo wing based microlite plane. I have some ripstop nylon lying with me, so would be using that.
The carbon fire rods lying with me are 4mm dia and 75cm long. So the dimensions of the wing are dictated by the rod length.
The build begins with the wing.
1435824004452-1809495182.jpg
6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #1 on: July 02, 2015, 08:40:06 PM »
ashok baijal
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Started by creating the top brace. Cut out a piece of ply and stiched the three carbon fibre rods as shown below
20150702_171600.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #2 on: July 02, 2015, 08:45:50 PM »
ashok baijal
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Next step was attaching the cross brace wich is another 4mm carbon fibre rod of 75cm length. Prepared two ply triangular supports and stiched one ply piece on each of the two outer rods. The cross piece was stiched to these two pieces. After ensuring that the two sides were symetrical, applied cyno to the joints. The wing frame stands completed.
20150702_203404.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #3 on: July 02, 2015, 09:59:15 PM »
ashok baijal
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Cut out the covering, but decided to wait till later before fixing it to the frame. So next would be building the fuselage.
20150702_215709.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #4 on: July 02, 2015, 11:03:28 PM »
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Quote from: ashok baijal on July 02, 2015, 09:59:15 PM
So next would be building the fuselage.

Ie, the pilot. Because the pilot is the fuselage Grin
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Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #5 on: July 02, 2015, 11:05:11 PM »
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Y is covering  bit smaller than frame?
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« Reply #6 on: July 03, 2015, 12:07:27 AM »
K K Iyer
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@rastsaurabh,
Y Huh?. You mean Why?

Its not.
The covering will be pulled in towards the outer arms of the frame.
Allowing it to balloon between the centre and side arms.
See pic in my prev post..
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« Reply #7 on: July 03, 2015, 06:11:12 AM »
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« Reply #8 on: July 03, 2015, 09:35:04 AM »
ashok baijal
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Quite a challenge as I am building from my imagination. Started work on the trike, took a lot of thinking for desigining the two axis movement for the wing.

@Iyer - I am not going with the hang glider version as this would require building all the servos and electronics inside the doll pilot. So building a powered trike microlite.

Will update today's build by tonight or tomorrow night depending on the progress.
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« Reply #9 on: July 03, 2015, 09:57:29 AM »
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« Reply #10 on: July 03, 2015, 06:08:59 PM »
ashok baijal
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Took some curtain railing and after drilling lightning holes, made a basic structure of the trike as shown below. Steering and elevator servo holes were cut off and two 9gm servos installed. Now it is time to design the control mechanism for elevator and aileron functions. Lets pray that I succeed in making one.
20150703_103439.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #11 on: July 03, 2015, 06:28:25 PM »
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Interesting   Thumbs Up best of luck
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« Reply #12 on: July 07, 2015, 11:33:54 AM »
ashok baijal
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Update: The trike frame was joined using epoxy. However, the joints were not strong enough and opened under pressure. So rebuilt the trike but this time used rivets/screws at the joints.
Made a small plywood box for fixing the aileron servo. Attached two aileron cranks that I had which would serve as a bushing for attaching the servo box to the pillars. This servo box has to move in conjuction with the elevator servo attached to one of the pillars.
20150705_115109.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #13 on: July 07, 2015, 11:40:39 AM »
ashok baijal
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More pictures of the aileron servo box
20150706_112846.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #14 on: July 07, 2015, 11:43:44 AM »
ashok baijal
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Next step was to build the arm which would move in tandem with the aileron servo. Cut out a T shaped piece from lite ply and after drilling a hole inserted a small piece of brass tubing to serve as a bushing.
20150706_112719.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #15 on: July 07, 2015, 11:47:54 AM »
ashok baijal
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Since the Rogallo wing will rest on this pivot attached support arms for the two axis. One arm was inclined at around 15degrees to give the initial incidence to the wing. I have attached this part using hot glue so that in case of need the incidence angle can be changed depending on the flight performance.
20150707_090743.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #16 on: July 07, 2015, 11:48:56 AM »
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Re:
Great going sir , Are the frame joineries riveted ?
Can you please post a pic of the rivets used and the tool . would be a great help
Regards
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« Reply #17 on: July 07, 2015, 11:51:00 AM »
ashok baijal
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The wing support brace was attached to the top of the servo box using a thin bolt. The brass bushing already inserted into the T shaped support allows this piece to rotate around this bolt. The aileron servo was attached to this arm.
20150707_093727.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #18 on: July 07, 2015, 11:53:02 AM »
ashok baijal
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I then did a trial mount of the wing frame on the central pivot. Attached a receiver and tested out the concept. A youtube video is attached. I fell the servos need to be upgraded to more powerful servos. Maybe in the next version of the trike.
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« Reply #19 on: July 07, 2015, 12:27:26 PM »
ashok baijal
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@docnayeem. A photo of the rivets and tool attached.
20150707_122651.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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« Reply #20 on: July 07, 2015, 01:20:33 PM »
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Nice build sir... I have one question.Where did you source the nylon from?
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« Reply #21 on: July 07, 2015, 01:23:36 PM »
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wow this is fascinating! :O
just a thought, what if you used 3 servos in a 120 deg configuration? like a helis swash? that should give you a little more strength too...
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« Reply #22 on: July 07, 2015, 02:43:47 PM »
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 Superb, Ashok Sir !

.....here's a pic of the rogallo kit I put together sometime back......fits together quite well.
the main joint is aluminium and two extreme ones are teflon, center nylon....and the mid-strut clamps are 1.5 Almn.....

....hope to finish after yours.
IMG_20150707_143355372.jpg
Re: 6th Sweepstakes - Rogallo wing Microlite plane
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"The Flight Of The Bumblebee"
 

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« Reply #23 on: July 07, 2015, 03:05:57 PM »
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.....deleted Smiley
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"The Flight Of The Bumblebee"
 

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« Reply #24 on: July 07, 2015, 03:11:53 PM »
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Quote from: rastsaurabh on July 02, 2015, 11:05:11 PM
Y is covering  bit smaller than frame?

.......an umbrella when opened is taut vis-a-vis its frame.....in a rogallo wing, it needs to BALLOON....so, the fabric is a bit larger than the frame.....
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