Jonathan S Posted February 14, 2022 Author Share Posted February 14, 2022 (edited) Shipping was 30usd but I got hit by import tax. Which I knew I would. So all in all, might be worth waiting till it is stocked in the uk unless you really want one now, like me.... Edited February 14, 2022 by Jonathan S Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted February 14, 2022 Share Posted February 14, 2022 Think I will stick with mine Jonathan it's only cost about £20 up to now for the foam board. If they do come to the UK they will still be subject to import duty and shipping, I wonder if that is why dealers current stocks are low and many of the Flite test models are out of stock. Quote Link to comment Share on other sites More sharing options...
Jonathan S Posted February 15, 2022 Author Share Posted February 15, 2022 (edited) Eric, you have the skill to "Do It Yourself" this is defiantly the cheaper and will produce the exact size and shape you want. I think I need to build a Flite Test one first to see how it works then see if I can replicate their methods to build something else. A bit like Richards planes are a nice way to build your first balsa model. For the money I did get a lot of kit, including: Plane all laser cut, 3 servos, 2 ESC, 4 props, 2 motors, 2 spinners, 1 Y lead, Battery and servo extension leads but it would be worth buying in the UK, but as you say its hard to get them in the UK and most places are out of stock. Edited February 15, 2022 by Jonathan S Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted February 16, 2022 Share Posted February 16, 2022 The weather has helped a little no flying so I have made some progress on the Mosquito, Bolt on wings on a foam board plane took a bit of working out. They have not been joined yet as I don't know if I should use one or two batteries it all depends on the final weight and C of G. 6 Quote Link to comment Share on other sites More sharing options...
Graham Davies 3 Posted February 17, 2022 Share Posted February 17, 2022 Looks great Eric. Did you use foam block for the nose section? How did you solve the bolt on problem in the end? Not having ply formers does indeed reduce the options! Graham Quote Link to comment Share on other sites More sharing options...
Jonathan S Posted February 17, 2022 Author Share Posted February 17, 2022 Eric, A master piece, I love the way you have been able to use the glass. What did you use to get the dimensions and shape right ? Kind regards, Jon Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted February 17, 2022 Share Posted February 17, 2022 Eric Your Mosquito does indeed look the part. I am pretty certain the full size mosquito wing was in effect one piece structure that was bolted onto the underside of the fuselage cut out. With the weight of the engines and fuel in the wing and the bombs in the fuselage actually attached to the underside of the wing structure meant the fuselage/wing attachment carried little of the normal flight loads. Good principles for foam board construction? Just saying. Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted February 17, 2022 Share Posted February 17, 2022 Thanks for the kind comments, Simon I built the Brian Taylor &1" span Mosquito a long time ago and it follows the construction of the full size. This one is based on the Areotech model for which I have the kit, it also is 71" span, with foam veneered wings tail feathers and most of the fuselage with a target weight of 9 lb for two 40 2strokes. I wanted to go electric and so the wing mount is on the top so when I get to the strip I can assemble the wing and fuselage then the top hatch including the cockpit canopy will provide battery access. also the one piece keel which is trebled should be stronger. I do like the Hawker models you have made and wondered why plank the fuselage on a Hunter when a rolled tube would be easy with the tapered ends planked. When I laid the floor in my current house I used a foam undelay which I believe is XPS I thought it too soft for modelling but it seems very similar to maker foam, it had a smooth surface and I found a piece of offcut which formed much easier than foam board. I tried to get some but Wickes and B&Q don't stock it now . the current XPS is ribbed and brittle. Do you know if it is still available? Graham & Jon. the nose is a clear moulding from Sarik of a 63" SPAN Mosquito that I have squeezed the nose down to make it fit. The picture also shows the wing mount solution there is a ply plate with brackets and tee nuts in the lower fuselage. 1 Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted February 22, 2022 Share Posted February 22, 2022 (edited) After finding the missing mojo I have returned to the Mossie, the tail end was an awkward shape to make with maker foam and I had considered foam blocks but the elevator and rudder mechanism and servo's were in the rear cone. so I persevered with the maker foam stripping the paper off both sides and forming it in 4 segments. I am happy with the result . Now for the nacelles. The tail wheel assembly is off a redundant foamie. Edited February 22, 2022 by Eric Robson added some text. 2 Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted February 22, 2022 Share Posted February 22, 2022 (edited) Eric The board I use is XPS 5 mm thick. One surface smooth and shiny the other is gently ribbed. Both Toolstation and Screwfix stock it called Vitrex, £23 for 19 sheets 850x600mm. It is relatively brittle but that does means it is that much stiffer so better at resisting torsional loads, an important aspect on my all foam unreinforced wing structures. ? The reason I prefer full length fuselage planking is it puts all the glue joints along the line of the tension forces whereas rolled tube sections put the glue joints across the tension, which is its weakest direction. Yes its tedious to do but it does also give a true smooth two dimensional curve. The Hunter fuselage may look a constant section over much of its length bit but in fact it is only so over the length of the wing root. ? At 9 lbs you will be operating well above anything I would be happy with. At such a wing loading you will be relying pretty heavily on the veneering for the wing's torsional rigidity. Is that a printed tail wheel assembly? Edited February 22, 2022 by Simon Chaddock Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted February 22, 2022 Share Posted February 22, 2022 Simon The XPS in Wickes was probably the same as the others. there was a piece lying on top of an open pack it looked as if it had been compressed so that may have been the reason it was so brittle, I did not fancy buying a full pack if it would not do the job. The tail wheel is a plastic moulding off an FMS Hawker Typhoon. I am not building the Aerotech kit, I used the plan and the former patterns for the fuselage, the wings were measured and drawn direct onto the foam board as was the tail plane. The target weight is 5lb max. I built this Seafury with a balsa frame and rolled 1/8" black depron around the foam board formers, it has had many flights now and is not showing any signs of stress, the whole plane is covered with brown paper and painted with acrylic paint. At 57" span it weighs just over 3lb ready to fly. 2 Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted February 26, 2022 Share Posted February 26, 2022 Jonathan, You asked how I designed my foam models CAD! cardboard and determination. The nacelles are going to be ABS, the one on the model is from a Warbirds replicas Spitfire which I managed to damage and a replacement was obtained from Richard. I have ordered two from Richard but in the meantime I am setting up with the old one, not quite as sleek as the Mossie but a quick way to get the job done. I am making up the top as it is totally different to the Spitfire and having decided to use 2 batteries the top will be access hatches. The top hatch needs some work as it is maker foam over 3 formers and when covered with brown paper the PVA dried out and shrunk it slightly and tried to flatten out 1 Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted March 4, 2022 Share Posted March 4, 2022 A push to get it finished for test flight this weekend has been thwarted. I have visitors for the weekend. 7 Quote Link to comment Share on other sites More sharing options...
Graham Davies 3 Posted March 4, 2022 Share Posted March 4, 2022 Looks amazing Eric! 1 Quote Link to comment Share on other sites More sharing options...
Jonathan S Posted March 4, 2022 Author Share Posted March 4, 2022 Wow, a master mossie 1 Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted March 20, 2022 Share Posted March 20, 2022 Martin, I have resurrected this thread, please feel free to ask any questions. 2 Quote Link to comment Share on other sites More sharing options...
EarlyBird Posted March 20, 2022 Share Posted March 20, 2022 6 hours ago, martin collins 1 said: Mossie looks superb Eric, is there a build thread on here for it? Here you are Martin, by way of a bit of magic.? Quote Link to comment Share on other sites More sharing options...
martin collins 1 Posted March 20, 2022 Share Posted March 20, 2022 So yours is scratch built not a Flite test one Eric? How did you get the nose shape in front of the cockpit? The foam is nicely curved in several dimensions. Quote Link to comment Share on other sites More sharing options...
martin collins 1 Posted March 20, 2022 Share Posted March 20, 2022 Would be very interested if you are doing a B25 Eric, i have a Aerotech International B25 kit here, i would be interested in making a much lighter one out of foamboard at the same size. Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted March 20, 2022 Share Posted March 20, 2022 Hi Martin, The front end is from a Robin Fowler Mosquito parts available from Sarik. On my Feb17th post of the wing section and ply joiner you will see the front clear moulding on the table, the canopy is from the CAP Mosquito also available from Sarik these 2 items are slightly under size but as it is not a super scale model it looks ok from 6ft. I have the Aerotech Mosquito kit and used that as a basis for the foam model. I could have used the mouldings from the kit but decided to keep it intact. The fuselage profile was drawn onto the foam board then the formers were reduced on my printer to adjust for the maker foam cladding which is 5mm thick , I will not do the same for the B25 as keeping it straight was difficult when cladding the second side. What span is the Aerotech B25 ? I have the Royal / Marutaka plan it is 72" I also have the cowls and canopies for it, I have been looking through some plans today thinking of making a single engine plane in foamboard but I think it will be the B25 next. It will be a slower build as the flying season is approaching. Cheers Eric. Quote Link to comment Share on other sites More sharing options...
martin collins 1 Posted March 20, 2022 Share Posted March 20, 2022 Aerotech B25 is 71" span Eric. Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted March 21, 2022 Share Posted March 21, 2022 Maiden flight today, very successful 4.5 min. flight 50% left in the batteries 2nd flight 5.5min 30% left . Left aileron trim and up elevator trim needed. More batteries on order. Landings were very easy. 6 Quote Link to comment Share on other sites More sharing options...
Graham Davies 3 Posted March 21, 2022 Share Posted March 21, 2022 37 minutes ago, Eric Robson said: Maiden flight today, very successful 4.5 min. flight 50% left in the batteries 2nd flight 5.5min 30% left . Left aileron trim and up elevator trim needed. More batteries on order. Landings were very easy. Great news Eric, well played. Not got the Ki-45 airborne yet. Little problems keep popping up. First an ESC turned out to be faulty, then an aileron servo failed and finally I noticed a 1000rpm difference between left and right motors. Once I have new ESCs, I'll hopefully give it a go. Not too hopeful on matching your flight times with my titchy 2200 3S packs though! Graham 1 Quote Link to comment Share on other sites More sharing options...
RICHARD WILLS Posted March 21, 2022 Share Posted March 21, 2022 Well done Eric . You really knock them out dont you ? Interesting comparison with similar sized wooden Mossies in terms of weight ! Although , to be fair , the adding of undercarriage and supporting structure would add a bit . Even so . at 6lb to start with an extra pound wouldnt change its forgiving nature . 1 Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted March 21, 2022 Share Posted March 21, 2022 21 hours ago, martin collins 1 said: Aerotech B25 is 71" span Eric. Actually the Marutaka /Royal one is 70 and 7/8" , strange how the Aerotech range were the size of many kits and plans available at that time. The Mosquito is the same size as the Brian Taylor one. Quote Link to comment Share on other sites More sharing options...
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