 Hi. Sadly no flying today. The refuel valve didn't like the cold and stuck open, also there's a problem with the fuel tank I think the clunk may have come off. Nevermind. There's always next week.
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Shaun I can see what you mean about the space for the tail plane servos. I had to cut them aswell. duane Merry Christmas to all
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Duane, are you building it stock or are you modifying it in any way?
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Dear all, happy Christmas to all of you and your families. 
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modifying it . am going to fit landing lights, repaint( Still can't make mind up on what scheme), fit cannon blisters to the wings . Got some brass tubing to make fake exhaust bit can't fit them until i know how far the cowl goes back. Am tempted to fit an arrestor hook . did you have a gap between the fusealage and the fin ? Duane
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Sounds good. I am tempted to retro fit the blisters when I fit the guns. I was also tempted by the arrestor hook, but impatience got the better of me. A gap between the fin and the fuselage? No, tight fittings all round. Where exactly do you mean? Got a pic? As for a scheme, how about a "Baghdad Fury"? Victor, happy christmas mate.
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Didn't fly today, but did all the ground runs. Pics and maybe some film to follow later. 
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 Earlier in the thread there were comments about the size of the spinner and "getting enough air in". From experience with radial cowls and single cylinder engines I can assure you that the scale opening will probably be too big! I'd advise you to baffle the part of the opening that isn't directly in front of the cylinder and make sure there is plenty of exit area - if there isn't at least 3 times the exit area than inlet area you will probably suffer from overheating. With a decent airflow over the cylinder - and particularly the head, you would be amazed at how small an inlet hole is necessary. I have flown a couple of Hellcat combat models with the cowlings uncut except for a tight clearance hole for the prop driver and a curved slot the size and position of the oil cooler (around 1/4 of an inch x 3/4 of an inch) which was direcly in front of the cylinder. The exit was an elongated egg shape around the cylinder head which was entirely within the cowling. The only place the air could escape was around and behind the head and they have never overheated. My own Puppeteer and a clubmate's Harvard both had overheating problems which were cured by baffling the holes with dummy engines leaving only enough gap for the real cylinder and making sure there was sufficient exit for the air. Not only does the large hole without a much bigger exit trap stagnant rapidly heating air, but the expanding hot air even pushes away the cold air that can't get in anyway! You wouldn't believe how difficult it can be to pursuade many people that the great big hole in a radial cowl is the cause of their overheating problems!
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Thanks Martin. I hadn't fitted baffles, but I may do eventualy. The runs today were "au naturale" or "sans cowling" to be more precise.
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| Edited: 23/12/07 21:57 |
 Looks superb As long as the motor is reliable and the C of G is good, you shouldn't have a problem Shaun I'm sure.
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Thanks David. Did you try the video?
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Yes mate - sounded fine 
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what size prop you using ?
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Can't remember, but I think it's a JXF 14x6 at the moment. I am running it in light and will probably go up to a 15x8 unless someone tells me better.
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Good morning all. Shaun as David said, if the engine pulls and sounds healthy and the cg is spot on, go ahead, open the throttle and fly it. If it was mine, I wouldn't resist. This morning I went flying. I took my Flair Lark 70 powered by Irvine 53 with tune pipe. Here (Malta) temp is 18C and wind is NE3. Not bad. I had fun. Happy Christmas to all of you and your families, wishing you many happy flying hours and Shaun good luck for its maiden flight.Keep us informed. God bless you all.
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what do you think about putting a three bladed prop on ? Sorry Shaun i have copied you and gone for a 108 two stroke to keep the price down .
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That's alright Duane, I copied my local model shop owner who said a 120 2st was too much but the 108 was great. You could put a three bladed prop on, but what for? There's bags of ground clearance and a 2 bladed prop is way more efficent. By the way, the ASP 108 starts with a quick back flip of the spinner by hand! Finger tip starting! Fantastic!
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| Edited: 26/12/07 09:47 |
have seen an sc 108 at galaxy models. it should be here in a few days. was just an idea with the three bladed prop.
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| Edited: 27/12/07 09:52 |
denotes 
