Paul H
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Everything posted by Paul H
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Hi Simon Welcome to a great hobby. I also live in Norwich and belong to the South Norfolk Model Flying Club. We have about 80 members with room for more, experienced instructors to help you learn to fly and a very good flying site 2 miles south of Wymondham. Most importantly folk are very welcoming, encouraging and irreverent! A Google search will take you to the website where you will find everything you need to know. Paul
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I am currently covering the wings and tail of an Xtra Wot with Oracover. The base covering is white and I want to trim with Oracover on top. Some pieces will be quite large and I would be grateful for any advice on how to do this and avoid trapping air bubbles. Many thanks Paul.
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Hi Peter Both the current and watts draw I quoted are from on meter readings so seem to be pretty accurate based on flight performance. Performance whilst brisk reflects what should be expected of a warbird, barrel roles, large loops and reversals are all in scope. The aileron authority is good but not particularly powerful, I.e. no fast rolls. Elevator again is good but not skittish. I have wondered about moving the cg back a little but it is in line with what the plan and others quote. Landing is no problem, I have fitted the 2 underwing filters the mk lX has which keep the prop clear when landing, I don,t set the break so the prop is turning when it lands. Equally no sign of nosing ever, well not yet! I haven't flown it over the winter but plan to do so more this year. Good luck with yours and I hope this helps Paul
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Hi Peter The details of how I finished the Spitfire are earlier in the thread. I also sprayed grey primer which was sanded back and then the finish is Warbirds Colour supplied by Fighter Aces. The finish was airbrushed using card templates which were fixed in place with small pieces of double sided adhesive foam pad to give the slightly feathered edge between the green and grey. I would imagine Poly C and EzeKote are similar as they are both water based but I haven,t used EzeKote so can't be sure. Your power train sounds more than adequate, I have had no suggestion of a tip stall on take off or landing. It is worth being very careful to build in the washout. I found the other build threads for the 46" span version of the Spitfire very helpful and reassuring. Particularly in relation to the weight and cg. Hope you get on well and would be good to see some pictures Paul
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Hi Peter Apologies for the slow reply to your questions. The motor is a BL2815/09 supplied by BRC Models turning an 11x7 prop. I use a 2200 lipo which gives around 5 minutes flight time with between 40% and 50% capacity left. There is plenty of power and I fly on half throttle for much of the flight. The esc is 40amp maxing at 36amps and 380 watts. Flying weight is 3lb 12ozs with about 8ozs of lead in the nose. The cowling is fibre glass. I made a plug cut from the nose when sanding the fuselage to shape. A mould was taken from the plug and then a grp lamination laid up. The result is thin and light but plenty of room to get the lead in. The finished model flys extremely well but the take off is a little skittish so I will make some adjustments to the dolly so the rudder has more authority. Probably by a couple of uprights to locate the fuselage near the tail. Hope this helps Paul
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Hi Torbjorn The finish is lightweight Esaki Jap tissue on the ailerons, rudder, elevator, tailplane and fin, medium weight tissue on the wing and lightweight glass cloth on the fuselage. The bare wood was first sealed with sanding sealer before the covering was applied with Poly C, a water based varnish. If the grain wasn't first sealed I thought the Poly C would raise the grain and make finishing more difficult. I wanted to keep the tail end as light as possible but still needed about 200gms of lead in the nose. The dolly is a simple 10swg (3mm) wire frame with 55mm wheels on the front and 50mm wheels on the back. It is 47cm long, 27cm wide 15cm wide at the rear axle. The height at the front including the wheels is 10cm. The uprights that sit at the leading edge of the wing are 8cm in front of the wheels which are raked forward. The uprights are 9cm high. Hopefully the pictures help.
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Thanks Jon, really helpful and I now have a clear direction.
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After far too many years (at least 6) I have managed to complete and successfully fly the 46" Tony Nijhuis Spitfire with a 3s system generating 380 watts (36amps) turning an 11x7. The cowling is fibre glass from a mould over a a plug taken directly from the front of the fuselage. This gives space for the motor and the lead I needed to add to achieve the correct CG. To be able to self launch I made a simple wheeled dolly which works fine but might need a bit of refinement. The model is based on the Mk IX Spitfire EN398 flown by Flying Officer Ian Keltie of 402 Squadron RCAF. At that time it was registered as AE-B which was then repainted as EN398 JE-J as flown by Johnnie Johnson. Thanks Tony for a great design that flies really well.
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I don't normally post on forums but how could I not on a thread appreciating the Laser. I have aeromodelled on and off all my life and was fortunate enough to purchase one of the first Laser 60s which powered a Majestic Major and then an early Laser 45 that was great fun in a Wot 4. After a 20 year gap with family and I work I returned to modelling several years ago but still on a very limited basis due to work but retirement beckons at Christmas so i am planing how to use my time differently. High on the list is a Brian Taylor Hurricane which will have a Laser, size yet to be decided. However in the build up I plan an Acro Wot XL to practice flying a larger model and would value the advice of those more knowledgeable than me on what size Laser would give good performance. Any thoughts? Thanks
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Andrew, the hatch is cut out after the fuselage is shaped but forward planning is required as the decking needs to tack glued to the fuselage sides and triangular longerons so that the area in front and behind the canopy can be released easily. Hopefully the pictures will help as it's not easy to describe. Been flying the Bullet this afternoon, flies beautifully with large manoeuvres and no lack of power but I think the CG can still go back a bit, currently 83mm.
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