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My Ultimate Biplane Build

The World Models 27% Ultimate 50cc Biplane Build Blog

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Ron Gray22/10/2017 22:36:01
251 forum posts
60 photos

I use some fuel tube under the washers so that I have to push them in slightly to insert the R clips. Helps keep them from falling out.

On my Wot Wot XL I’ve used rivnuts so only have a bolt to fasten when assembling, nice and quick and easy.

Gary Manuel23/10/2017 00:01:34
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1291 forum posts
1060 photos

That sounds like an interesting idea Ron.

Any photos so I can see where the tube goes?

Gary Manuel23/10/2017 14:12:49
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1291 forum posts
1060 photos

Nice one Ron yes

This feels really good. It removes any trace of free play and is really easy to put on and feels really firm once on. I tried it with a washer between the tubing and the R-clip but that makes it really awkward to get the R-clip on. I think I'll finish up with something like this, but maybe with a washer between the cabane and the tubing (washer glued to the cabane).

I'm going to move onto other things next and come back to this once I've given it some thought.

dscn5905.jpg

Ron Gray23/10/2017 14:15:39
251 forum posts
60 photos

Sorry, I didn't make my previous post clear. I add the tubing to the other side of the clevis so that pushing on the head compresses the tube making it easy to slip the pin in. Then the R pin rests tightly against its own washer to prevent damage to the covering.

I'm not back home until later on tonight so can't post a piccy of what I mean but hopefully you will get the idea!

Edited By Ron Gray on 23/10/2017 14:17:09

Gary Manuel23/10/2017 15:01:01
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1291 forum posts
1060 photos

It's OK Ron, I understand what you are saying and I may finish up doing just that. i.e assembly order = pin, washer, tubing, washer, wing tab, cabane, washer, R-clip. Push pin in against tubing to allow R-clip to be inserted. Release pressure to tighten R-clip up.

The only issue I have with this assembly order is that the clevis pins are free to be removed (and lost). I wanted to epoxy the pins into the wing tabs to minimise the chance of loosing them (in flight, or in transit / assembly).

The issue I have with the way I've tried and photo'd above is that the R-clip could slice its way through the tubing and lose the spring tension.

Nothing decided yet, but thanks for the suggestion, which I may still use.

Ron Gray23/10/2017 15:20:45
251 forum posts
60 photos

In that case try this assembly sequence:

Pin, tubing, washer, tube, tab, SMALL piece of tube (acts as retainer), cabane, washer R clip.

john stones 123/10/2017 15:28:54
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8729 forum posts
1375 photos

Drill em so they fit proper against a washer glued on the strut, put a little flat on the pin if you're worried about the bit running off.

Gary Manuel23/10/2017 16:42:28
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1291 forum posts
1060 photos

Been thinking about how to get the two servo wires from the receiver to the top cabanes.

It's make difficult because the fuel tank is already in position and the turtle deck is formed around foam cores, which are still in situ.

First job was to prepare 2 lengths of spiral wrapped servo wire and thread them through 2 lengths of plastic drinking straws.

dscn5906.jpg

Hole drilled in the turtle deck and drinking straw threaded through the two layers of foam.......

102301.jpg

...... and out of the bottom into the void above the fuel tank.

102302.jpg

Servo wire passed down the drinking straw and hook attached to the camera.

102303.jpg

Servo wire grabbed with the hook.

102304.jpg

Drinking straw glued in place using gorilla glue.

The wire can be easily pulled up / down the tubing which will make crimping of the servo plug / socket possible.

dscn5907.jpg

Servo wire coiled up at the other end ready for cutting to length and crimping.

dscn5908.jpg

Gary Manuel23/10/2017 16:44:25
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1291 forum posts
1060 photos
Posted by john stones 1 on 23/10/2017 15:28:54:

Drill em so they fit proper against a washer glued on the strut, put a little flat on the pin if you're worried about the bit running off.

It's a 3mm diameter stainless steel pin.

Drilling a 1mm hole through the centre of it is beyond my skill level with the tools I have available.

Edited By Gary Manuel on 23/10/2017 16:46:23

Gary Manuel23/10/2017 21:07:53
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1291 forum posts
1060 photos

Failsafe receiver switch added in line with the ignition switch.

dscn5909.jpg

Servo sockets added for the upper wings.

dscn5910.jpg

Receiver installed and all wiring secured.

I was planning on including some more photos showing satellite receiver mounting and the other steps needed to finish my build off. Unfortunately, I had an accident with my camera at this point. I dropped it and it landed flat on the lens, causing it to sink back into the camera.

Back once I get camera repaired or renewed.

dscn5911.jpg

 

Edited By Gary Manuel on 23/10/2017 21:08:42

john stones 123/10/2017 21:15:58
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8729 forum posts
1375 photos

Borrow mine if you like.

Gary Manuel23/10/2017 21:34:38
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1291 forum posts
1060 photos
Posted by john stones 1 on 23/10/2017 21:15:58:

Borrow mine if you like.

I might need to.

My first problem is explaining to Mrs M that HER CAMERA is broken.

I bought it for her a few years ago as a Christmas present. Guess what she's getting this Christmas.

john stones 123/10/2017 21:47:05
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8729 forum posts
1375 photos
Posted by Gary Manuel on 23/10/2017 21:34:38:
Posted by john stones 1 on 23/10/2017 21:15:58:

Borrow mine if you like.

I might need to.

My first problem is explaining to Mrs M that HER CAMERA is broken.

I bought it for her a few years ago as a Christmas present. Guess what she's getting this Christmas.

Judging by boxes in your kitchen...I'm going with Cornflakes question

Gary Manuel23/10/2017 21:54:11
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1291 forum posts
1060 photos

They've all gone.

Rich too24/10/2017 06:03:01
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2455 forum posts
940 photos

Great progress Gary yes I may have to invest in one of those cameras.

I’m with you on drilling the clevice, wink

Gary Manuel24/10/2017 16:28:54
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1291 forum posts
1060 photos
Posted by Rich too on 24/10/2017 06:03:01:

Great progress Gary yes I may have to invest in one of those cameras.

So will I by the look of it! sad

No photos to show you today, but I've finished the wiring off, added diagonal bracing across the top of the canopy bays, set up the servo throws and added a few stickers.

I've also glued the clevis pins into the wings. The flexible tubing will go on the outside along with the R-clip, as per my photo above.

I'll give it a good clean and going over with a hot iron, then it's finished.

Hoping for maiden flight tomorrow smiley

john stones 124/10/2017 16:34:26
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8729 forum posts
1375 photos

Not much of a blog without picys is it. sad

Don't suppose there'll be any of the maiden either. sad

Rich too24/10/2017 16:34:42
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2455 forum posts
940 photos

Good stuff Gary - what's the forecast?

Rich too24/10/2017 16:36:11
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2455 forum posts
940 photos

Mmmm, a bit windy in the morning, calming down after lunch - down south!

Gary Manuel24/10/2017 16:41:01
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1291 forum posts
1060 photos
Posted by Rich too on 24/10/2017 16:34:42:

Good stuff Gary - what's the forecast?

Good flight with a safe landing hopefully wink

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