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Member postings for Martyn K

Here is a list of all the postings Martyn K has made in our forums. Click on a thread name to jump to the thread.

Thread: Rob's F-86F NASA 228 research aircraft build
10/12/2019 08:58:30

Where did the plastic mouldings come from Rob?

 

I like the colour scheme. Are you going to do the pointy bit on the nose?

 

Martyn

 

Edited By Martyn K on 10/12/2019 08:59:19

Thread: Colour scheme advice needed
09/12/2019 17:15:27

These look rather snazzy..

Schemes

Martyn

Thread: Not a new newbie
09/12/2019 17:12:51

Hi Mark

Regarding Batteries, for your average club sized model, NiMH have replaced NiCd which you may remember.. Still the same voltage - nominal 4.8v for a 4 cell pack. You can still use the same trickle chargers as well

Welcome back to the hobby/sport/pastime. Its come along way in the past 20 years.

Martyn

Thread: Martyn's F-86 Sabre Build Blog
09/12/2019 10:28:36

Thanks Graham.Yes - it was great to meet a fellow Sabre-ite. Hope this is fairly self explanatory..

Best wishes

Martyn

03/12/2019 14:34:33

Thanks Martin

I'll be bending in situ (carefully)... When I eventually fit the tailplane halves, they will be epoxied into place. The rear rod will have bend at the end to keep it located and rigid. A detachable tailplane tailplane would be nice to have but not essential on a model this size.

Martyn

Thread: S1581 Hawker Nimrod MkI
03/12/2019 09:12:44

That looks so neat Danny.

Are you going to add the diagonal seam tapes?

Martyn

Thread: Martyn's F-86 Sabre Build Blog
02/12/2019 13:09:32

Thanks Peter

 

Yes it will definitely be maidened at an LMMGA site, then repaired, then maidened again.

 

Martyn

Edited By Martyn K on 02/12/2019 13:09:47

Thread: Pete's Cavallino Rampante Italian Aerobatic Team Sabre
02/12/2019 10:06:20

Peter

Is that 3mm to allow for the tapering of the LE (and TE) to accomodate the sweepback?

Martyn

Thread: Martyn's F-86 Sabre Build Blog
02/12/2019 09:44:52

dsc_1362.jpg

The rudder torque rod looks like this. The bearing tube is square, the horn is angled and the lower bearing block is essential

dsc_1363.jpg

Elevator horn is temporarily removed (yep - got this bit in the wrong order) and the torque rod bearing glued into place

dsc_1364.jpg

Through the gap in the fus view. A ball link is essential as the linkage will twist. The lower bearing is glued tyo the lower spine

dsc_1365.jpg

Another view with the dowel pushrod fitted

dsc_1366.jpg

Upper fus now fully planked

dsc_1367.jpg

Fin fairing fitted. Note the blood. It will fly well

dsc_1369.jpg

The servos are mounted on a ply tray with 10mm beech blocks for the screws

dsc_1370.jpg

Now its getting tricky. Fitted the tailplane fairings. Lots of weird shapes to sand from underneath

dsc_1371.jpgWhile that was drying, more planking zzzzzz

dsc_1372.jpg

Started work on the nose. I added an additional 6mm balsa layer before the 3 nose pieces went on and then started sanding to shape. I don't think its a million miles out.

dsc_1373.jpg

Yaay. The planking is finished. TBH, I am quite pleased with my planks, very little filler is required

dsc_1374.jpg

Working on those tailplane fairings. It needed little bit of infill..

dsc_1375.jpg

Started on the exhaust cone. Laminated from 6mm and 12mm balsa

dsc_1378.jpg

and after a bit of sanding. The inner was rounded using a dremel drum sander

dsc_1379.jpg

The tailplane fairings are faired into the fin using well shaped triangle stock

dsc_1380.jpg

Fitted and sanded.

Only a little more progress in the past couple of days as I have had a dose of man flu.

More to come

Martyn

02/12/2019 09:44:34

A bit of a delay - apologies..

There has been some progress though. I have a new laptop that is adding to my typing turmoil as it has a different keyboard layout

dsc_1325.jpg

Added a short central brace (top and bottom from 6mm balsa. Links the two halves together quite nicely

dsc_1326.jpg

Started work on the elevator horn. Mine is made from 1.5mm glass fibre sheet to the same layout as the plan. A brass bearing tube with supporting washer epoxied in place as a pivot. This site inside two hardwood blocks with brass tube bearing. Shouldn't be any wear problems.

dsc_1327.jpg

dsc_1328.jpg

Meanwhile the planking goes on

dsc_1329.jpg

and on..

dsc_1335.jpg

The wing seating area now cutaway. I wish that I had half cut that former before I glued it into place..

dsc_1339.jpg

The upper side of the wings sheeted and glued into a test fit fives me a nice indication of size.

dsc_1340.jpg

I will fill the wing roots in when the wing gets bolted into place

dsc_1341.jpg

A test fit of the horn, its offset because I am using an internal rudder torque rod

dsc_1342.jpg

R/E servos fitted. Lower than shown on the plan because I am using pushrods rather than snakes

dsc_1346.jpg

Fin sanded to shape and fitted. The hinge line for the rudder has been moved forward about 3mm to clear the elevator hinge

dsc_1347.jpg

Measured the angle directly off the plan and checked it was vertical by using Mk1 eyeball against the wing. It needed a little packing to sit against the ply side plates

dsc_1348.jpg

Added a little more sheeting around the fin. There is not much of a curve here and one piece of 3mm balsa fitted nicely

dsc_1349.jpg

and more planking...

....continued

Thread: Cheap Chinese Laser Cutter
29/11/2019 15:03:54

Thanks Andy

I'll try them

29/11/2019 15:01:29

I bought the banggood laser engraver. I would lilt to modify the frame so it is 1m long and 350mm wide. I really need two lengths of the extruded aluminium frame. I don't suppose anyone has any idea where I could get this from?

Thanks

 

Martyn

Edited By Martyn K on 29/11/2019 15:02:55

Thread: S1581 Hawker Nimrod MkI
27/11/2019 11:34:55

Thanks Danny

Mine will be slightly different as I will be using the GF cowl. I'll try using Metalcoat for all except the blisters and cowl front.

You have no idea how helpful this is.

Martyn

27/11/2019 11:05:40

Hi Danny

Still need to watch the last video but I am now confused what foil/litho or flite skin you used where. I think Litho was used for the blisters and the front of the cowl..

Can you summarise please?

Thanks

Martyn

26/11/2019 21:45:15

Hi Danny

The videos are superb .Thanks

I am not sure how you overcame the loss of adhesion when using soapy water . Did you dry off and start again?

Any thoughts on how you would seal it to prevent fuel or oil ingress?

It's very impressive stuff .Is it very much harder than the pipe Ali foil?

 

Too many questions .Sorry

 

Martyn

Edited By Martyn K on 26/11/2019 22:13:01

Thread: Precedent Stampe 1/4 Scale
26/11/2019 15:15:44
Posted by Phil B on 16/11/2019 20:16:55:

I am just doing a test, stripping Solartex from the tail of a Junior 60 and replacing with polyester, so I can see what weight difference there is. Solartex is about 90 g per sq m, so I think your 40g poly is likely to come out lighter. Solar film polyester is 60g including the adhesive so is probably lighter but a lot dearer.

Hi Phil

Any more thoughts on the Polyester? Is the process

1. stick it down at the edges,

2, heat shrink then

3. dope to finish?

How fine grained is it and how much dope did you need? I may try some of the silver for my Hawker Fury..

Thanks

Martyn

Thread: S1581 Hawker Nimrod MkI
20/11/2019 09:20:38

I have to admit I saw the first shot and shuddered. The rework looks great though. Very good indeed

Well done. How tough is the foil though will it withstand normal handling or do you have to be super gentle with it.

Martyn

19/11/2019 15:26:26

I can clearly see why you used those carbon caps on the stringers. They look amazing. Nice and crisp

Thread: Unusual Aircraft
19/11/2019 14:46:46

That's just a big model. Someone clearly has aeromodelling skills when they put that wing together

Thread: Moving the Centre of a Plan when Printing in Poster Format?
19/11/2019 09:21:58

Try downloading and using Foxit PDF Reader, Its a much better reader than Adobe and you can de-centre a tiled print to reduce the output.

Martyn

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