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Building Brian Taylors Cessna 120

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Dwain Dibley.22/05/2019 15:19:34
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1267 forum posts
1265 photos

OK...............In between being a Taxi for Mother and cutting the bottom off two doors, i have had a little play wit the cowl.

The Grills are bonded and filled, and I have made the Carb intake grill. This a balsa frame with mesh sandwiched inbetween the frame and a 1/32 ply surround.

The cowl is also now screwed onto the fuselage, I have to make another block for the bottom.....the plan calls for a metal bracket ????......

The plan calls for some dummy exhaust pipes that exit under the cowl so that will be next.

It will have to come off again for the outlet hole, a kind of baffle (that shields the Zorsts), and paint.

Looks like the struts will be the last job .....LOL.

D.D.

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The Carb grill and the firewall/motor mount extension.

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The prop should force a bit of air through these puppies.

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barryt22/05/2019 15:36:55
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53 forum posts
15 photos

OK Dwain, does this pic help?60266328_583326302173407_3310339326063149056_n.jpg

Dwain Dibley.22/05/2019 16:48:46
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1267 forum posts
1265 photos

That's the one Barryt,

Ooooh........look at the rivets...........LOL

I have fitted the switch, and fixed the carb grill in.

I am just having a think about the wiring and where to place the Rx etc. I want to be able to get to everything. Methinks I need to get her on the Balancer.

D.D.

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Edited By Dwain Dibley. on 22/05/2019 16:51:12

Dwain Dibley.22/05/2019 19:00:13
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1267 forum posts
1265 photos

Getting there. Just need cutting to length.

D.D.

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Dwain Dibley.22/05/2019 20:54:01
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1267 forum posts
1265 photos

Last little bit for today Chaps..........the motor mount.

As you can see in the photo above, i have the last cowl block in place, with the cowl on and the motor in place i measured the distance from the prop driver to the out side of the cowl and added 4 mm.

This is the amount of wood i have to add behind the motor to get the prop nice and close.

I then laminated some balsa and the ply mount ( borrowed from another build , dunno what )

Once that dries I can mark up the firewall and fix the mount in place.

D.D.

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Dwain Dibley.23/05/2019 11:08:50
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1267 forum posts
1265 photos

After a thrashing on the old belt/disc/bench sander.

D.D.

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Dwain Dibley.23/05/2019 13:06:36
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1267 forum posts
1265 photos

Fitting the motor.

D.D.

Lined up; side thrust and down thrust accounted for.

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Marked up after carefully removing the cowl.

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.......................

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Fixed, note the bevelled cut outs for the motor wires, no chafing here Lads.

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Clearance and side thrust.

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I am now off to climb ladders and fix gutters before the Missus gets back from work. LOL

Dwain Dibley.23/05/2019 17:48:29
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1267 forum posts
1265 photos

Gutters and windows clean, rubbish off flat roof, gutter fixed.

Back to the important stuff...................

Cowl has dummy engine covers added, made from covering film with the edge folded, and is painted. I will make the hinges out of thin metal, and some catches out of the scrap bin.

D.D.

Paint showed a few imperfections in the cowl, so a bit of filler required. Then a final sand, a few rivets, and final coat.

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Dwain Dibley.23/05/2019 19:55:45
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1267 forum posts
1265 photos

In between coats of paint and filler, I thought I would get the control snakes connected up. I managed to get two inners out of one, so I have one left, .................Er.............out of two.surprise

I have permanently attached the tail fin, Rudder, and elevators.

It's a bit close at the back end but nothing clashes re the horns with full servo movement, and as I will have quite small throws, it's all good.

D.D.

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Rx battery position, viewed from the bottom hatch. I was going to put the Rx here as well, but comments re the covering and reduced range have changed my mind and it will go on top of the "suitcase" behind the pilots. I can hide the leads with a bulkhead or similar.

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Dwain Dibley.24/05/2019 19:21:42
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1267 forum posts
1265 photos

Not done much today, had a bit of a doss day, but have added a bit more to the cowl. Stuff made from twine, and cut up bits of metal from a door closure cover, rivets from good old blobs of Aliphatic applied with a cocktail stick.

Cabin side glazing from bits of clear packaging. Fixed on the outside and the frame will be painted in. door out line will be added later.

D.D.

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Pretend hinges LOL.

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Dwain Dibley.25/05/2019 13:23:17
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1267 forum posts
1265 photos

Under pressure this morning from the Family, all Female, so a LOT of pressure, to get the Wi-Fi sorted, so a lengthy phone call to Virgin media ensued.

A very helpful Chap went thru the motions and got it all up and running in about 30 minutes.

I am always amazed by this remote maintenance. 10/10 for Virgin media Man.

Anyway...................I thought I would assemble the 120 and get her on the scales, before I add too much weight....frown

Nothing to worry about, she came in at 2102 g, that's 4 lb 9 oz in old money. With just the struts to add, an AUW under 5 lb should be achievable.

The above was with flight battery and Rx battery on board.

D.D.

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Edited By Dwain Dibley. on 25/05/2019 13:24:24

McG 696925/05/2019 18:23:13
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2527 forum posts
977 photos

Very wise of you to keep the Ladies happy, Dwain.

But try to keep yourself happy as well... so, don't forget the prop nut... devil

Getting quite close now. Love the touch of your rivets btw.

Cheers

Chris

Dwain Dibley.25/05/2019 20:03:59
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1267 forum posts
1265 photos

Very close McG.................I have even made the struts...............Can you believe it ??

The prop nut is in a safe place. wink

The rivets...........another bit of fun, but I agree......they look OK don't they. ??

I cut down the 3 mm clevis rod and soldered it to the end of the 2 mm wire rod, measured up and put another one on the other end. Then I fixed this in place on the wing, and measured up for the rear strut, allowing for a bend on the front for soldering.

With 3 clevis the struts are very adjustable, and I have added locking nuts to all six.

The next job is to cover them in wood and sand to shape.

D.D.

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Bound with copper wire and soldered, then heat shrink was applied just for belt and braces.

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Dwain Dibley.26/05/2019 00:08:09
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1267 forum posts
1265 photos

OK............I have now made two struts, and have clad one in balsa. A bit awkward this, due to the way I made the struts, but I got round it OK, and they still fit................Good old clevises......wink

D.D.

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Percy Verance26/05/2019 08:05:29
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8109 forum posts
155 photos

Nice build DD. yes I've been looking in from the start as I'm a bit of a fan of light aircraft models.

It seems like you made yourself a bit of extra work with the struts though, as only the wing end clevises really needed to be adjustable if you think about it..... Still nice work though.

I'm still wondering if that silver covering will have any effect on the radio signal..........

barryt26/05/2019 08:29:03
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53 forum posts
15 photos

**LINK**

Looks like Oracover recommend external antennae when using Chrome film.

Shouldn't be a problem for you Dwain.

Percy Verance26/05/2019 10:15:00
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8109 forum posts
155 photos

So perhaps there are potential issues? Those new Spektrum receivers with no external antenna would be a no go it seems? Not that I own any.............

Fortunately, some of my rx's have detachable aerials which can be subsituted for longer external versions if i ever do a chrome finish. Looking at DD's Cessna here, it does look good.

 

Edited By Percy Verance on 26/05/2019 10:18:48

Dwain Dibley.26/05/2019 15:46:18
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1267 forum posts
1265 photos

Thanks Percy....................Yes, in hindsight I could have got away with what you suggest.

I suppose the next job really.......is a test of the Rx re the covering.

I have already changed the position of the Rx from deep in the bowels of the fuz to inside the cabin, where there is plenty of "glass". If it still proves to be an issue I can easily put the Arial outside in the fresh air.

The Chrome covering is very good, easy to put on, but does show every mark. You feel like you need to polish it every five minutes. smiley

D.D.

Dwain Dibley.26/05/2019 16:05:13
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1267 forum posts
1265 photos

I have covered the struts, and fixed the lock nuts with threadloc, I have labelled them port and starboard, for obvious reasons.................

I have put the lines on the fuselage and the cowl, I used masking tape to apply the thinner lines and the ones on the cowl. I made my own scheme.

D.D.

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Percy Verance26/05/2019 18:34:00
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8109 forum posts
155 photos

Those red trim stripes look the business DD.

I always liked the look of these early Cessnas, preferring them to the newer 150/170 series. I also quite liked the radial engined variant, which had a similar-ish overall look to your model. I think YT did an artf once over, but it would be too large for me now. These days I prefer models of more practical dimensions.......

Edited By Percy Verance on 26/05/2019 18:35:55

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