alan p Posted March 25, 2021 Share Posted March 25, 2021 45 minutes ago, cymaz said: That will do nicely. Ditto ? 1 Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted March 25, 2021 Author Share Posted March 25, 2021 I had an interesting message from a friend that said, braided bowden cable should always be used for throttles, possibly due to vibration damping? Anybody heard this?? Meanwhile in Auster land, I refitted the lower panels that I had to remove. because I cut with a scalpel, and at a steep angle, everything aligns and goes back reasonably well. Cheers Danny 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted March 26, 2021 Share Posted March 26, 2021 Considered opinion is that metal rods should not be used for throttle pushrods as vibes can be transmitted back to servo. I’ve used piano wire as throttle pushrods and not experienced any problems, maybe it depends upon how thick / rigid said wire is. I tend to use Bowden cable mainly because it can bend around obstacles such as fuel tanks! 1 Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted March 26, 2021 Author Share Posted March 26, 2021 Thanks Ron, maybe one of those things that has not stood the test of time and modern technology? Anyway, my considered opinion lol is I think I will leave it as is..... Quote Link to comment Share on other sites More sharing options...
Dwain Dibley. Posted March 26, 2021 Share Posted March 26, 2021 Perhaps something left-over from back in the day when servos were rubbish, these days even cheap HK servos beat them. ?? Personally, I have never had a problem with wire push rods. I gravitated away from IC to Electric as it's soooooo Clean. I still have an SC 52 fs and a 26 cc Zenoah. D.D. 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted March 26, 2021 Share Posted March 26, 2021 Ah DD, the joys of Laser ownership is that they are very clean when run on low oil fuel, still not as clean as leccy though but that sound.....................? 1 Quote Link to comment Share on other sites More sharing options...
Dwain Dibley. Posted March 26, 2021 Share Posted March 26, 2021 I agree, the sound of a fourstroke is awesome. I just remembered I have a .20 fs in my Lancer, that sound gorgeous pottering around at half chat Ron. Never owned a laser (sorry Jon) D.D. 1 Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted March 26, 2021 Share Posted March 26, 2021 I think it goes back to the early days of RC and metal carb. levers, when the metal to metal interfered with the signal. Most carbs now have a plastic lever, I have always used a piano wire throttle control where I have been able to get a straight run and never had ant problems with it. 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted March 26, 2021 Share Posted March 26, 2021 For those problems Eric I use Nippon. 1 2 Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted March 26, 2021 Share Posted March 26, 2021 My eyes must be getting worse, Why do they put the Y next to the T? I did have a problem with wasps chewing the balsa away to make a nest in my Dennis Bryant Bulldog. 1 1 Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted March 26, 2021 Author Share Posted March 26, 2021 Quick sanity check with you I.C. guys please? Not a great drawing but does this make sense? Ideally I want to fill and drain the tank after flying. But I cannot see how I am supposed to see that the tank is full? Cheers Danny 1 Quote Link to comment Share on other sites More sharing options...
David P Williams Posted March 26, 2021 Share Posted March 26, 2021 That's how most of mine are, it just overflows through the pressure line out of the muffler. I count turns of the handpump or seconds on the electric pump so I don't waste too much. Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted March 26, 2021 Author Share Posted March 26, 2021 3 minutes ago, David P Williams said: That's how most of mine are, it just overflows through the pressure line out of the muffler. I count turns of the handpump or seconds on the electric pump so I don't waste too much. Okay that makes sense. Yes should be able to calibrate crank turns with cowl removed ? Quote Link to comment Share on other sites More sharing options...
Ace Posted March 26, 2021 Share Posted March 26, 2021 Time or turns for guide but then I also pull the pressure line and place the end in a small bottle to collect the overfill. Prevents killing the grass or staining the hard standing. Being an honorary Yorkshireman you can reuse any overfill as its clean having not been through the silencer. 1 Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted March 26, 2021 Author Share Posted March 26, 2021 The exhaust is buried on scale models so access to the pressure line is not possible ? Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 26, 2021 Share Posted March 26, 2021 Danny, could you put a T-piece into the tubing that connects to the exhaust for pressure? Take another piece of fuel tube from that to somewhere you can conceal, with a plug in the end that you can remove when you fill up? Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted March 26, 2021 Author Share Posted March 26, 2021 31 minutes ago, Colin Leighfield said: Danny, could you put a T-piece into the tubing that connects to the exhaust for pressure? Take another piece of fuel tube from that to somewhere you can conceal, with a plug in the end that you can remove when you fill up? I did muse over that colin, but couldnt see how it would be encouraged to favour the overflow tube as opposed to the exhaust route. I think counting pump rotations should work ? Quote Link to comment Share on other sites More sharing options...
cymaz Posted March 27, 2021 Share Posted March 27, 2021 (edited) It’s wise to keep pipe work and joins to a minimum. Reduces the risk of air leaks and poor reliability . Have different colours of fuel tubing, makes it easier to remember what pipe goes where when exiting the fire wall. Edited March 27, 2021 by cymaz 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted March 27, 2021 Share Posted March 27, 2021 Of course if there was an inspection panel handy you would be able to open it and see the fuel passing through the pressure pipe to the silencer. 1 Quote Link to comment Share on other sites More sharing options...
DaveyP Posted March 27, 2021 Share Posted March 27, 2021 1 hour ago, cymaz said: It’s wise to keep pipe work and joins to a minimum. Reduces the risk of air leaks and poor reliability . Have different colours of fuel tubing, makes it easier to remember what pipe goes where when exiting the fire wall. Different colour tubing is a good idea, I use Green for Glow, and Pink for Pressure... 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted March 27, 2021 Share Posted March 27, 2021 I used to do that but I once ran out of a colour and that tended to mess things up a bit! But I do use clear on lines that I want to see the fuel flow in. Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted March 27, 2021 Author Share Posted March 27, 2021 I have some green and red translucent tubing on its way sufficiently coloured to identify which is which, but clear enough to see the contents moving. My laser 80 arrived this morning, and placing it alongside the bay the tank would need to be lowered, and that's is not straightforward as the floor of the tank box is built in. So I will save the Laser for another model and stay with the Saito 82. I can always change it later if I really feel the urge. Cheers Danny 2 Quote Link to comment Share on other sites More sharing options...
Nigel Sharp Posted March 27, 2021 Share Posted March 27, 2021 At my fathers I was looking through an old book from the 1940's (Odhams Railways, Ships and Aeroplanes) and on the second page of the Aeroplanes section are two photo's of an Army Auster doing it's business (scanned here for your pleasure). If the photo's have not been superimposed (I am looking at the shadow and elevator position in shot 2 which are dubious ) its pilot has quite impressive flying skill or a death wish. Fancy doing this as a "Scale" manoever at a contest? Here is the photographic evidence. As a youngser I used to pour over that book looking at all the illustrations of Steam engines, Ships and Aeroplanes. There is a picture of a Quantas DH86 airliner and plenty of shorts flying boats all very period even the "new" jet gets a mention. It has that lovely old book aroma too :-). 1 1 Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted March 27, 2021 Author Share Posted March 27, 2021 Frightening photographs Nigel, definitely not for the feint hearted! Thanks for sharing them Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted March 28, 2021 Author Share Posted March 28, 2021 Managed to get the tail surfaces sanded/rounded. I have also filled the carbon tube areas with sculpted balsa. Hard points added to the tail-plane too, the rigging will be functional so this will be important. Two coats of full strength dope and we are ready for covering. Cheers Danny 1 Quote Link to comment Share on other sites More sharing options...
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