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David Davis

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Posts posted by David Davis

  1. Just a heads up Hooch. In the olden days Solarfilm used to react to diesel fuel causing it to wrinkle. I believe that Oracover/Profilm will resist diesel fuel. Best check that the film you intend to buy will be compatible with diesel fuel.

     

    Solartex is compatible with diesel fuel.

  2. I would leave the compression screw where it is until you have the engine securely mounted in a test stand, a supply of diesel fuel and a suitable propeller. Also bear in mind that the silicon fuel tube which you can use on a glow engine will melt if introduced to diesel fuel. I believe that tygon tube which is available from anywhere which sells garden machinery is suitable for both diesel and petrol engines but I'm not certain because I've not run a diesel engine for many years. Whatever you do, don't try to start it with an electric starter.

     

    For good starting techniques please refer tothe links in my post of 5th March.

  3. I flew the Baron with its new wing yesterday. It flew very well but the engine ran out of fuel as I was lined up for a landing and it landed undamaged in a fallow field. I have since fitted a bigger tank. It requires a little cosmetic work, some fine tuning of the engine and I need to make up some sort of gun for it to comply with the rules of La Coupe Des Barons. I'm very pleased with the new lightweight wing. Incidentally I have covered the underside of the port wing in black film and the underside of the starboard wing in white similar to the early WW2 RAF fighters.

    Bertie Baron (1).JPG

    Bertie Baron (2).JPG

  4. Today's my seventy-sixth birthday, lots to do so I don't have much time but herewith the results of using De Luxe Materials Super Phatic glue with large Kavan pinned hinges as suggested by Don Fry above. These will be used on my Laser 155 powered Mystic.

     

    Slots were made into two pieces of scrap 1/4" (6mm) balsa. Five drops of the glue were put on each face of each leaf of the hinge and the two pieces of wood were pressed together. Having left the joint to dry for more than 24 hours I found it impossible to pull the two pieces of wood apart. Normally I put some form of grease on the fulcrum usually butter but this time I did not bother. The hinge moves freely and I did not add cocktail sticks or dress makers' pins.

     

    I have used this glue extensively in the build of the new wing of my Baron and have been very impressed by it.

     

     

    Experiment with Super Phatic Glue..JPG

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  5. The new wing is covered and fitted to the fuselage. It is 3 ozs (80grammes) lighter and 2 inches (5 cms) greater in the wingspan than the Ukrainian wing pictured above. My fault but it's still within the dimensions allowed in the rules! There are a few cosmetic jobs remaining and I need to add the British roundels, the gun and the wing warping wires.

     

    Incidentally the first British wing seen in my post of 24th December was only 57 inches (145cms) in the wingspan. No wonder it flew so quickly!  According to the kit box a Baron's wing should be 155cms!

    Bertie nearly finished.JPG

  6. 56 minutes ago, Hoochykins said:

    I did cut out some of the obvious bigger ones. What kind of price would you be expecting a used SC 25? Running of course.

     

    Dunno but if it's any help I've just bought a brand new ASP 61A for 60€ including postage, say £50. 

  7. 6 minutes ago, Hoochykins said:

    The below are listed for sale at various places, would any of these be good and are decent motors? I maybe should have kept the MDS motor out of the list:

     

    MTN Pro 46 RC

    Magnum 40 GP RC

    Thunder tiger gp42
    Mds 40
    Os 40 fp 
    Os 40 max
    Sc46

    SC 25

    SC 25a

    All of these engines are too big for a Super Scorpion except the two 25s.

  8. 2 hours ago, Hoochykins said:

     

    It's nice but a bit on the pricey side for what I want. I'll keep an eye out for engine job lots or for a 19 to come along with all the gear. If something does jump out at you as a bargain I'd be well chuffed if you could let me know. Nitro or diesel.

     

    Well it depends what you want. Two stroke glow motors are ten a penny. A decent OS 20 or 25 FP will not command much of a price on eBay, foustrokes are a little more expensive.

  9. 14 minutes ago, Hoochykins said:

    Yeah? I only liked the idea of an old Diesel but if it's going to cause more problems than it's worth then I will go Nitro.

     

    I did see a O.S FS-40S for sale, in videos that sounds lovely but I guess it's got a lot more power than I need?

     

    I used to fly the Super Scorpion on an OS 40 FS before I sold the airframe. It's currently in my Guidato which though a similar size to a Junior 60, a Super 60 or Super Scorpion, it's much heavier than the other three and not as nice to fly.

     

    If you want to fit an "old Diesel" please go ahead but the old diesels did not have either throttles or silencers so not really practical these days.

     

    Steve Webb Models is advertising a brand new single ballrace PAW 19 on eBay: https://www.ebay.co.uk/itm/185130686244?itmmeta=01HR7KB7B4J75FXQFEHKZRCRES&hash=item2b1aa61724:g:uagAAOSw3JlheTxJ

     

     

  10. 1 hour ago, Hoochykins said:

    Okay so a 15 won't cut it. I'll keep looking for a 19 with the exhaust and carb included.

     

    Getting it running and keeping it running will be fine. I'm alright with engines and mechanical stuff.

     

    It would be great If you spot anything that might work at a decent price to let me know, it would be very much appreciated 👍🏻

     

    On reflection a 15 might fly it. The engine bearers on the rather larger Radio Queen are spaced for a 2.5cc engine but I still think that you'd be better off with a 19 on a five foot model like the ones we have mentioned. You'd have to buid it very light if you wanted to use a 15 and the engine in your picture has neither a silencer nor a throttle so not ideal. Although fitting a PAW silencer to a non-r/c PAW engine is not a problem, you cannot fit a throttle to a PAW with a vertical air intake.

     

    Video of a PAW 19 r/c running here: https://www.youtube.com/watch?v=NEQDqFHcXjw and here: https://www.youtube.com/watch?v=1e_RH7i0U2o

     

    I  would be inclined to use a four stroke glow engine on a vintage model myself.

  11. A 15 would probably be too small for these models. It's only 2.5cc besides this engine has no throttle or silencer.

     

    Picture of a PAW 19 with throttle and silencer below.

     

    Finally if you are going in for a diesel please be aware that they chuck out a great deal of unburnt oil all over your lovely model.

     

    PS. Model diesel engines are not as difficult to operate as some people claim but you have to know what you're doing because you have two controls which can effect the running of the engine: the compression vernier and the carburetter's needle valve. When I was a youth diesel engines were commonplace but they have fallen out of favour over the last sixty years. I used to be a member of the Shropshire Model Flying Club which had just over eighty members at that time. AFAIK only three of us even owned a diesel engine. That said, one of the other two only flew diesels.

     

    Consequently you may find it difficult to find someone to help you get your diesel running.

     

    Just sayin'.

     

    PPS. I turn 76 next Monday!

     

    paw19brrc_a.jpg

  12. Just a brief update on my preparations for La Coupe Des Barons.

     

    The new wing is almost finished and I'm pleased with the way it's turned out. A Baron's wing as kitted features four spars arranged in two pairs and twenty-eight wing ribs. One pair of spars is made from basswood, the other pair from balsa. My wing has eighteen balsa capped depron wing ribs, a built up trailing edge, a carbon fibre leading edge and three balsa spars. The forward part of the wing is fully sheeted resulting in a D section. The wing is extremely light and rigid. There's still a bit of cutting, shaping and sanding to be done, the attachment points for the wing warping wires need to be glued into place and the front section needs to finished off before I start the covering process. Then there's the pilot, gun and cables which need to be fitted. 

     

    Earlier this morning I took the opportunity to measure the wingspans of all three wings. According to the infomation on my kit box a Baron's wing should measure 155cms or 61 inches in the wingspan. The Ukrainian Baron's wing measures 60 inches, the new wing measures 62 inches but the wing with the lower dihedral currently fitted to the British Baron measures only 57 inches. No wonder this model is more difficult to fly! I did not deliberately enlarge the new wing but there we are, it's within 10% of the original!

     

    As stated above I've already flown Boris Baron but since then I've received the roundels and numbers from Lee at Pyramid Models so here's what it looks like in fighting trim. You could say that it's colourful! The Flourescent Yellow stands out really well so I intend to incorporate some of this colour into the colour scheme of the new wing.

     

    The weather forecast is good for tomorrow so I plan to fly Boris.

    Boris Ready For La Coupe.JPG

    Bertie's New Wing.JPG

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