FLY ELECTRIC
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Polycrylic and Talc
FLY ELECTRIC replied to Papa's topic in Building from Traditional Kits and Plans
The varnish I used was RONSEAL CLEAR SATIN ACRYLIC, and I used about a heaped tablespoon of talc in the 250ml pot. Different makes of water-based acrylic varnish vary in consistency but there is a point at which the mixture becomes sludge and will not paint on properly so just add a bit at a time until it reaches a consistency that is thick enough to fill the furry edge of the Depron where it has been sanded, but not so thick you can't brush it out properly. Best to leave it in a warm place overnight so it's really hard, before attacking it with 400-grade wet or dry paper. Hope this helps, Nigel Hawes. -
Thank you all very much! Liam is actually my 3rd son, but the first with my new wife who is 18 years younger than me, so it's a new experience for Rachel and a very special second chance for myself. Believe me, we are enjoying every day of Liam's life! Definitely one of my better designs! Nigel Hawes.
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And here is the little chap!
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Hi Rob, Fortunately Steve hargreaves directed me to the thread so I could reply - its been too busy to follow since the arrival of my baby son four weeks ago! The balance point on this model is EXTREMELY critical; 3mm can be the difference between excellent flight characteristics and an unmanageable model. The elevator problem does sound like C of G but the gap won't help - for the work involved it might be an ifea to tape them up but apply the tape with full down on each side so it doesn't restrict the downwards movement. After criticism that my designs always followed a "safe" formula it's interesting that I release a more challenging design and everyone gets different results! Two of my friends made them, one flies superbly, the other is awful. I think it's all down to build accuracy and set-up whether the Fliing Wing you build flies well or not. Don't worry about the 9" prop, mine uses an 8.5" prop and I simply launch it at half throttle. Nigel Hawes. PS - Top job with the finish, Rob!
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Hi Guys, Just been given a link to this thread. Firstly, re the sentence in the article saying that the UBEC unit switches the CURRENT between 5 and 6 volts, not guilty I'm afraid - whoever subbed the article can take the rep for that one! As for the ORANGE wire on JR leads, guilty as charged m'lud! As I have no JR equipment I rang someone who uses it exclusively, and he assured me the orange wire was the positive: I should have researched this properly so I bend over to be spanked. Finally, Nigel may well be being "over-cautious" in the article, but since a 3Kg aerobat went out of control at an Electric Fly-In due to a blown BEC (too many servos for the 3s Li-Po) and missed Nigel's 3-year-old son by less than a foot at more than 50 Mph before completely destroying itself in the ground less than 6 feet away from us, then yes, Nigel will continue to be "over-cautious". If a model of mine ever injures a child, or worse, then at least it won't be due to a blown BEC. Think about it. Nigel Hawes.
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HEATHEN! The only thing I have with my whisky is... more. Hey I like that build thread - anyone know what language it is and what it says? Mind you I only noticed it wasn't English once I sobered up, it made perfect sense last night! What a lovely looking job, and great colourscheme. Nige.
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Don't hold your breath Andy... You may go very blue in the face! Nige.
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Less whisky needed Timbo!
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Somebody needs to, as electric flight can be baffling enough for the less technically minded without potentially misleading information that could cause irrevocable damage to expensive components. Nige. PS - Nice to meet you at the NATS Timbo!
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Chris - Simplest way is an 18 SWG pushrod with a "z" bend at each end - no need for clevises abd bo slop! Nige.
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Oh Poo, my cover is blown!
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Ian - Let me have your E-mail address. Nige.
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I'm sure there are sme very good retired Engineers Erfolg! Fortunately you don't write in to the letters page and confuse everyone! Perhaps I should take an electronics engineering course... Nige.
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I've had zillions of E-mails about that letter already, and I think it needs a reply. It would be easy for a relative Electric Flight beginner reading it to get the impression that he could go from a 3s Li-Po to a 4s pack and see the current actually drop! As most of us know that is the exact opposite of what would happen and on safety grounds alone this should be pointed out. I wonder how many EScs / Li-Pos / motors have been melted so far... Whilst it is true that a certain wattage can be achieved using a higher input voltage and a lower current, I think that was sadly lost in the way the letter was written. And I'm afraid I always roll my eyes when a letter begins "....As a retired electronics engineer..." Nige.
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Patrik - I'm delighted that you like your Fling Wing and that you plan to make a larger version with wheels! Thankyou for telling us about the video on You Tube - I was not aware of it. Here is the link for anyone wishing to see it: http://uk.youtube.com/watch?v=scl9W2ajEpE It shows how docile the Fling Wing can be on 2s and a fairly large prop. Best wishes, Nige.
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Andrew - If you get it right, rivers can be fun...
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Erfolg - If you do not use so much downthrust it climbs with the power on full and can even do a loop by itself! You need to use the correct amount shown, then there is no pitch change at any throttle setting. Best wishes, Nige.
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Thank God for the edit function!
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Chris - I believe shortening the shaft is dealt with in part 2 of the article, out on Friday unless you subscribe! Prop balance is very important on any electric model and is the first thing you should do when you buy a new one. I often svae them up and spend a whole evening doing about a dozen! However your 7x4 is too big for 2s and too small for 3s! Try an 8 x 4 instead if you ntend to use a 2s pack. Best wishes, Nige.
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Birdy - Whizza will fly on 200 watts, and can handle 400 so there's your range. Aim for an AUW of 2 1/2 pounds and you won't go far wrong. If you mean the cheap 90mm fan unit with motor for £30, I understand the source will be Giantcod. Finally I have no experience of the Zippy Rhino packs so I can't really comment; however the Loong max cheap Li-Pos have really impressed me. attached below is a picture of a twin EDF review model powered by 2 x 2250 LM packs in parallel. at 50 Amps, this 4500 arrangement is showing 11.6 volts and flies the model for well over 10 mins, not bad for 2 £17 Li-Pos. Nige.
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There is a very cheap 90mm fan unit and motor combo that will be available soon for less than £30. Also BRC have a lovely all metal 68 or 70mm fan unit with motor integral - I have it in my van to test and photograph. Add to that some fantastic looking EDF ARTFs on their way and 2009 is going to be a very interesting season I think! Nige.
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Tell you what Gordon - I'll loan you the recommended motor (1500Kv) and an 8" prop if you have a suitable sized 2s Li-Po? That way if yours instantly becomes a success, then we'll know for sure where your problem lies! Nige.
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Gordon - I can only summise that it's to do with the propwash over the surfaces. My 8.5" propped 2s yellow Fling Wing goes away underarm no problem but the 6.5" propped 3s Silver one prefers a firm overarm chuck - yet they are both exactly the same except for the prop diameter and 11 grams of weight difference. I'd have to go up to a 4s pack to put a tiny prop on the silver one to see what would happen with the launch and unfortunately i don't have any small capacity 4s Li-Pos suitable for the job. However as the set-up information is mainly in part 2 of the feature (see separate thread regarding it being split into 2 parts) I just hope not too many other builders have deviated from what I recommended and been similarly frustrated as I don't release my designs for readers to be disappointed with! I'll get the Auzzie lads to post launch pics of theirs, unless Stuart can! Best wishes, Nige.
