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World Models Spitfire 60

Assembly of new Spitfire 60 with Laser 80

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Timothy Harris 111/12/2015 23:37:12
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431 forum posts
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Hi all just thought I would start a thread for one of my winter projects a World Models Spitfire 60 powered by a Laser 80 . I decided on this particular kit partly due to the time I have available and partly because I couldn't find a similar kit build for a 80-90 4 stroke. The 80-90 size is the "sweetspot "for me in modelling with very practical running and handling requirements and construction. It had to be a four stroke for a Spitfire. I already have an OS 80 in an Acrowot (my first proper kit build for years) and an OS95v in a BH Chipmunk. I am very impressed with Nitro 4 strokes. The WM Spitfire has retracts, Flaps(not split flaps)and requires 7 servos. Its very well built and the parts are much better than on other ARTF kits I have assembled.

For the Spitfire it had to be a Laser. I was so impressed seeing one in a fellow Club members Fokker and the sound it made. Plus Lasers are built in Hemel Hempstead UK so very fitting for a Spitfire. I called up john at Laser and he was incredibly helpful and knowledgable. He even checked the plans for the plane to check I was choosing the right engine. When I visited them to pick the engine up I knew I had made a great choice. Its built like an expensive watch and almost to good to put in a plane!

Timothy Harris 111/12/2015 23:42:18
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431 forum posts
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img_1389.jpg

Timothy Harris 111/12/2015 23:51:28
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431 forum posts
65 photos

Above is the modified firewall so the Exhaust and carb have sufficient clearance.(the engine will be inverted.). I epoxied two 1/8 ply stripsunder the engine bearers, continuing them right across the firewall for strength. The other Mod I made was to cut the front bulkhead inside to lower the tank nearer the wing. Laser Carbs are near the cylinder head and John warned me that if I didn't lower the tank, fuel may syphon out. I will add photo of cut out bulkhead below. I also reinforce the inside of my planes with West Systems Epoxy and glass fibre. On the engine bay I used thicker matting, but light-weight laminating matting on some of the other internal structure. I have added a max weight of 60g doing this and it is concentrated at the front end of the plane. It makes them much stronger!

Timothy Harris 111/12/2015 23:52:30
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431 forum posts
65 photos

img_1390.jpg

Timothy Harris 111/12/2015 23:55:13
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431 forum posts
65 photos

Here is the Lovely Laser 80 !!img_1395.jpg

Edited By Timothy Harris 1 on 11/12/2015 23:57:48

ASH.12/12/2015 00:58:52
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144 forum posts

Subscribed. Good subject Tim, I'm interested to know of the quality, fit and finish and your overall view when it flys. WM models are not too common on here. I would advise you seal all edges of covering with Solarfilm Clearcoat. The covering is not Oracover.

Like you Tim I believe in proper strenghtening and had thought of using fibreglass and laminating epoxy inside a model where the wood is suspect. But I also have to remember not to pile on the ounces.

Enjoy the build.

Ash

Timothy Harris 112/12/2015 13:37:29
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431 forum posts
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Hi Ash thanks for reply. Good to hear a fellow reinforcer smiley. The epoxy is very light. much much more so than polyester. I used to do a lot of model power boating years ago and got used to glassing. So far the World models quality seems very good. I have even used their pushrods. The hinges are metal pinned too. Agreed on the covering. That does need some ironing. The other thing to note on this model is that it needs a low profile retract servo. I used a small but powerful Futaba 8kg one. There is a guy who has posted a video of the retract installation on you tube.

Timothy Harris 112/12/2015 13:42:08
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431 forum posts
65 photos

img_1397.jpgHere is the wing. set up I will be using the separate little LIFE battery above which will power the retracts. I will velcro it onto the wing when I do the balancing later. the single servo runs the flaps. there are two aileron servos.

Glenn Philbrick12/12/2015 17:06:31
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195 forum posts
54 photos

Hi Timothy

I have one of these and am very pleased with it. Mine is powered by an OS 70 fs and has more than enough power. I put invasion strips on it which makes it easy to see and I also brushed over the whole model with matt varnish which sealed the edges and took the shine off the covering. The cowl is a bit big but you don't notice it in air

Glenn

Jack Banner02/01/2016 13:00:43
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332 forum posts
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Subscribed for updates. I look forward to seeing this at the field Tim.

Timothy Harris 102/01/2016 22:21:00
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431 forum posts
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Cheers Jack. Its coming on and I have a few updates. Thanks for encouragement too Glenn. Its good to hear it flies well. I Like your idea of the invasion stripes too, and also want to do that (I have bought the flair paint. and matt varnish). The cowl is now complete and I have put baffles in to enhance engine cooling as the Laser will be almost fully enclosed. Radio gear is in and I have also lowered the tank and changed the position of the throttle servo to suit the low laser carburettor.

Timothy Harris 102/01/2016 23:12:23
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431 forum posts
65 photos

Here is the new internal view with lowered tank. The retract battery is on the right near the throttle servo. There are a couple of reinforcing beams I added which can be seen on each side of the tank.img_1429 (1).jpg

Edited By Timothy Harris 1 on 02/01/2016 23:25:39

Timothy Harris 102/01/2016 23:16:44
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431 forum posts
65 photos

Here is the plumbing on the laser engine. The system is non-pressurised as John at Laser recommended. i have pointed the breather pipe forward. The red line will be the filler and middle pipe crankcase breather. img_1432.jpg

Timothy Harris 102/01/2016 23:20:47
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431 forum posts
65 photos

Here is the cowl offered onto the engine. The retaining screws have not yet been fitted so it is not centred. I reinforced the cowl inside with light fibreglass laminate applied with West Systems epoxy. The cooling baffle can be seen from the front. I will be adding a lip on the air exit, in the centre of the cowl just to the rear of the exhaust to give a venturi effect to help hot air exit.img_1434.jpg

Edited By Timothy Harris 1 on 02/01/2016 23:22:15

Edited By Timothy Harris 1 on 02/01/2016 23:23:14

Percy Verance02/01/2016 23:57:30
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5414 forum posts
108 photos

Timothy

Your installation looks neat. I notice you've got the silencer just poking out of the cowl. I also noticed your particular silencer doesn't seem to have a threaded portion just inside the outlet. I mention this as it is possible to fit a small extension to get the oily residue slightly further away from the cowl. Certainly, some of my larger Laser silencers have the threaded section, but it may only be on the 100 and above. I have a new boxed .70 here, but it's currently buried under a heap of other stuff so I can't check that one.

I mention it simply because it looks like you could benefit from a small extension?

Timothy Harris 103/01/2016 00:05:33
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431 forum posts
65 photos

Cheers Percy. I actually also bought a longer extension silencer from John at laser just in case, I agree with you on that and I will fit it as I don't fancy having oil all over it. I'm trying to hold myself back from running the engine until its fully painted!! Happy new year to all ...Tim

Timothy Harris 124/01/2016 16:37:49
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431 forum posts
65 photos

img_1455.jpg Oh dear it looks like its winking at me!! Can you spot the dodgy roundel!
I think I will have to source alternative decals. I don't want to make them myself. Just easy stick on ones hopefully. I have spent a few hours painting on the invasion stripes with flair paint via a brush and am nearly complete. The idea with this model is to be a practical flyer rather than a scale masterpiece(I'm not up to building one that well anyway!)

Edited By Timothy Harris 1 on 24/01/2016 16:38:52

Braddock, VC24/01/2016 17:34:39
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1457 forum posts
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Subscribed.

Timothy Harris 124/01/2016 22:56:58
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431 forum posts
65 photos

Welcome Mr Braddock.
Hopefully i will soon have the painting done and post photos. I have ordered new decalls from Warbirdreplicas.co.uk . These are 1:8 scale and this model is 1;7th hopefully they won't be too far out. At least they look the correct type. One downside on this model is that the covering is very glossy and the decals incorrect. I am rectifying that with the Flair matt varnish and painting the invasion stripes too. That should help orientation. The wing stripes included in the kit are not very nice in my opinion, but are easily removed. Ash and Glenn mentioned the covering coming unstuck in posts above, I have also had to stick down a number of edges.

Jack Banner29/01/2016 18:20:40
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332 forum posts
43 photos

How are you getting on with this Tim? Any progress?

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