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Everything posted by Peter Miller
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They look impressive. Should be fine.
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Hi Dave I am a strong believer in the KISS principle. have fun and enjoy.
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The trailing edge spar will be fractionally larger than 1/4 Sq due to the taper of the TE. But in fact 1/4Sq could be used. I know that because I just built the SARIK version of the parts. In fact up until then they had not included the 1/4 sq TE. I have now advised them of that fact. To be honest when I built that Sarik kit I didn't realise the discrepancy that the original instructions said that and I just used 1/4 square and never noticed any problem...This may say something about my building🤔 Actually that drawing shows that the bottom is square or at 90 degrees to the vertical sides. If you happen to have some 1/4 sheet you can strip off some slightly wider sections and shape to match the ribs as shown. Alternatively you can either add a strip of 1/16 to the top of 1/4 sq. but that is being fiddly. The final solution would be to use 1/4" square and a bit of sanding and fractional thinning of the aileron. I hope this helps.
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Forum members' new models: Let's see them.
Peter Miller replied to Paul Marsh's topic in All Things Model Flying
I would add that the pilots expression is very realistic!!!! -
Forum members' new models: Let's see them.
Peter Miller replied to Paul Marsh's topic in All Things Model Flying
Do you know, I had completely forgotten that model! Now I see it I remembers it. It goes well!!! I did a lovely Macchi Folgore for Cambria Kits but they never produced it. -
Hi Neil, I am so glad that you have had some good flying with Oodalally and are enjoying it. It is a nice model which I why I built a second one with the electric conversion. You have done a very nice of the building and covering. I wish you many happy hours of flying with her.
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Aerodynamics discussion re Pitts Special
Peter Miller replied to Graham Davies 3's topic in In The Air
Lets be quite honest You can go on with all these theories and ideas but in fact slight errors in suposedly identical models will affect things.. The only way you are going to solve these various effects is with a proper wind tunnel. I will give you an interesting event to think about. Early in my air force career I worked on the last Lancasters in the RAF and was able to go in three air tests after major servicing. Part of each air test involved a stall test which involved throttling back,pulling back on the controls until the nose would drop in the classic stall. Then open the throttle and resume normal flight. On one air test the aircraft refused to stall. IT just wallowed along nose high and throttled right back. The pilot tried this four or five times with the same effect. After that they just gave up. Explain that because no one else could. -
Aerodynamics discussion re Pitts Special
Peter Miller replied to Graham Davies 3's topic in In The Air
Actually rereading Graham's statement he is saying that when he applies rudder it is having the same effect as DOWN ELEVATOR. If it is the effect of having more rudder surface above the datum line in theory it should make the aircraft PITCH UP. but his pitches down. I still don't believe that the small difference in area so close to and above the datum line would make the model pitch down. I do appreciate the super fine tuning of pattern ship and the need for ultimate precision of everything but here Graham is talking about a basic model and an extremely wild effect theoretically going the wrong wy if the larger area above the datum line is the cause. -
Aerodynamics discussion re Pitts Special
Peter Miller replied to Graham Davies 3's topic in In The Air
I am a bit puzzled by this. All aircraft have more rudder above the horizontal axis. Now I have never noticed it in any of my designs but then perhaps I don't fly very well. I know that my CAP flew the most perfect knife edge and I don't remember ever needing any aileron correction and one needed a LOT of rudder for that. and I can't say that I have ever heard of it in any full size aircraft. After all, the amount of differential leverage on a rudder considering that most rudders are tapered with more area below the centre line will be quite small. -
WE have a club member who built a Ballerina. He complained bitterly about the big gap when he joined the wings. considering I had given him a set of the original instructions he didn't get a lot of sympathy. Then he glued a piece of brass tube into the wing to take the front locating down and FAILED to secure the actual dowel into the tube. He asked the club secretary to test the model. When the sec turned it inverted the dowel had slid out and the wing came off. The builder blamed the club secretary!!!!!!!. I will make no comment!
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Hi James. You build the first wing complete with R-1.. You then build the second wing but DO NOT glue the root rib in place until you prop the first wing up in position and only then glue in the second root rib. This way you get a perfect fit of the two wings at the correct dihedral angle. You can then add the second wing top leading edge top sheet.
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I like builders!!! As regards to taking longer I would also give you my favourite quotation from the late great Bill Winter's Purple Plan: "So long as you glue one piece of wood to your model every day it will get finished" I build fast because I have been doing it for a very, very long time and I certainly do not achieve the degree of perfection that others do. At least my models fly well...usually!
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Hi Dave I am using the 4-Max recommended set up. 3547 1070. 12X 6 high performance wood and 3300 3S battery. It works well. Have fun, it is great on electric power. probably slight;y better then the i.c set up but it is a looooong time since I flew the i.c version
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A Sargent Major was giving a recruit a severe telling off and finished up by saying "See that window up there? Go up there, drop your trousers, stick your backside out the window and give your brains an airing" Some time later the Sargent Major saw the recruit and asked him. "Did you follow my orders?" Recruit "Yes Sargent Major" Sargent Major "Did anyone see you? Recruit "Yes Sargent Major, The Station Commander!" Sargent Major "Oh1 What did he say?" Recruit "Good morning Sargent Major."
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Scale flying, what's right and what's wrong
Peter Miller replied to Chris Walby's topic in Scale Matters
Not necessary.Just steep bank for a moment and because the guns had to aim in front of the aircraft they changed aim to anticipate where the aircraft would be when the shell detonated.