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Jeremy Bright

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  1. My order for Liquid Weld arrived today. I was greatly relieved.
  2. Has anyone bought Liquid Weld recently? I ordered some a week ago but so far it hasn’t been dispatched and I am beginning to get worried.
  3. Thomas. Many thanks for the gen on threads. Most useful and I shall make a permanent note of it. I have been unable to start my Mills 1.3 and came to the conclusion that there was some internal damage. Turning over the prop. I could feel a slight click as it went over top dead centre. I could get the engine to fire but not run. I had a job and a half to remove the cylinder head. It would not budge so I applied some heat by passing a gas torch gently over it to expand the metal. It then came off easily revealing the cylinder liner. I undid the four screws and off came the cylinder liner. I noticed that there are two thin rubber gaskets sealing it too the upper crankcase. The piston was now revealed and I was able to drift out the gudgeon pin. As it came out it fell apart in two pieces. A clear case of metal fatigue. I noticed that the piston had worn two grooves in the ends of the pin. I had to make a replacement. The holes in the piston could take a 3mm diameter drill snugly but it was a bit of a loose fit through the little end of the connecting rod the hole having worn slightly oval. Not to worry. I cut a new pin from 3mm diameter silver steel 10mm long then hardened it to about 700 degrees C. and quenched it in water. I fitted it and reassembled the engine. After the Christmas festivities are over I will try to run it and wake up the neighbours.
  4. I am relieved. For a moment there I thought I might have a fake. Your sound advice is appreciated.
  5. A big thank you to all you guys who have taken such trouble to answer my query about the Mills 1.3 shaft thread. Yes, Simon is right. It is 2BA. What foxed me was that I could not screw a 2BA full nut on to the threaded portion of the crankshaft and yet I could wind a 2BA screw in to the prop. nut. On close inspection I see that the end of the crankshaft thread has a slight distortion which is sufficient to stop the 2BA nut and the spinner nut from engaging to start turning. I shall have to get a 2BA die and run it over the threads to true them up. Regarding the RC throttle I note what brokenenglish says and he is correct. The interesting thing about the throttle barrel is that as it turns the air hole decreases in size restricting the airflow but at the point where it closes completely a tiny breather hole is exposed sufficient to keep the engine ticking over. There is a similar arrangement on PAW diesels where the breather hole is drilled through the carb. body and keeps the engine running when the throttle is fully closed. Personally I prefer to blank it off so that if I hit the throttle cut button on the transmitter the engine stops. Simon, if you have not yet put your Mills back in the roof can you have a look at the crankcase backplate and tell me if it is inscribed "Mills Bros." Mine is not and yet my Mills .75 is. I always understood that it was one way of distinguishing a genuine Mills from a copy or replica. Once again thanks to one and all.
  6. Thank you Simon and PatMc. I have just tried a 2BA nut and it doesn't fit (too small). I will keep listening out.
  7. I have just acquired one of these little beauties and am anxious to run it. It is a Mark II and has a R/C throttle. However there is a problem with the spinner nut which has a damaged thread and will not screw all the way up to the prop. I want to use a nut instead but what is the crankshaft thread? I was able to screw on a M5 nut but it is a sloppy fit and cannot be right. Mills would not have chosen a metric thread in 1948.
  8. Thanks Mike. It's reassuring to know that Sparky can fly unaided by radio interference. It is interesting that your friend put a PAW 1.49 in her because that is precisely what I intend to do. I am a diehard diesel fan and although I have an Allbon Javelin I want throttle control which the PAW has but the Allbon does not.
  9. Has anyone built and flown this vintage 1951 model designed by Harry Hundleby and featured in AeroModeller for January 1951 ? It had a 48 inch wingspan, a short moment arm, a lifting tail section set at minus 2 degrees incidence and powered by a 1.5cc. Allbon Javelin diesel it was claimed that it was capable of penetrating a 40 mph headwind on rudder only control. If you have built and flown it please let me know your impressions of its flying qualities. Here is a picture of a very attractive electric conversion I discovered on another forum.
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