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david james 1

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Posts posted by david james 1

    Old OS120FS rebuild

    in IC Engines

    Posted

    Unfortunately I don’t have the kit to make an insert like that. However I have done the next best thing. I found some two thou shim, cut a strip, wrapped it round the manifold and screwed it in. It seems to be holding on the remains of the thread but time will tell!

     

    I found a YouTube video showing dismantling this engine and it suggested the use of heat. I got my hot air gun out and freed those pins quite easily 

     

    • Like 1

    Old OS120FS rebuild

    in IC Engines

    Posted

    A friend has given me two ancient examples of this motor. The better one has freed up easily and I have actually got it running. Unfortunately the thread for the exhaust manifold is almost completely stripped and I can’t get it to hold in place. Thus I want to change the head  to the one from the other engine.

     

    As far as I can make out, the rockers are on a separate casting which has to be removed to give access to the head bolts. To do this the actual rockers have to be removed by taking out their pivot pins. These seem to be held in place by a grub screw which you can see next to the hole for the inner cover securing bolt

     

    i have removed one of these but can’t seem to drift out the pin even with the use of a hammer. I have tried in both directions. Any suggestions where to go from here please?

    IMG_0370.jpeg

    Lightweight covering

    in Scale Matters

    Posted

    I am resurrecting a Fokker D8 I built from my own plans some 25 or so years ago.

     

    I covered the tail in a lightweight material, I think was made by Solarfilm. It is like a tissue rather than woven or a film but does not need doping.

     

    I need to recover some area and still have half a roll of the material left. I can’t remember the technique but think you apply Balsaloc to the framework and, when dry, you hot iron it on. After that, I am not sure if you can shrink it with a hot iron or with a water mist.

     

    Any help would be appreciated.

     

    Align starters

    in Gadgets and Electronics

    Posted

    Does anyone here know how the switch works?

     

    MY align turns as soon as it is connected to the battery. I have taken one side off and the micro switch seems to work OK - at least it clicks when I press the actuator. I can’t properly check it without taking off the wires which seem to be soldered on.

     

    Obviously the switching mechanism is more sophisticated as the micro switch connects to a little electronic board.

     

    Has anyone got any suggestions 

    Any suggestions for indoor flying?

    in Electric Flight for Beginners

    Posted

    I have recently joined my local indoor flying sessions. I am a reasonably experienced outdoor flyer but am finding flying in such a small space quite challenging.

     

    I have started with a Microaces SE5A but a couple of times the wall has jumped out and hit the plane. I am wondering if I should get something slower flying to get my eye in.

     

    UMX Night Vapor seem quite popular but other suggestions are welcome.

    • Like 1

    Spektrum DX5i manual

    in Gadgets and Electronics

    Posted

    It was given to me second hand so I don’t think consumer legislation will be much help.  The problem seems to be the main board not the switch so the items shown won’t do the trick.

     

    I have posted a Wanted ad on BMFA Classified and I am hoping that will bring something. 

    Spektrum DX5i manual

    in Gadgets and Electronics

    Posted

    After a lot of messing around with a multi-meter and talking to the helpful man at Logic RC, it seems that the switch is not the problem, there is a fault in the motherboard.

     

    The issue is that the TX does not enter the power-down routine when the stitch is turned off. It does seem to stop transmitting but the power-down routine saves the various settings that i had programmed in -servo reverse and a mix. Thus if I pull out a dry cell to turn it right off, it defaults to factory settings.

     

    He said the motherboard is not available and unless I can find one from a scrapped set, the TX is for the bin. This wouldn't worry me too much as it was free but I have invested several £100s in an indoors model that I cannot use on my usual Futaba Tx.

    Spektrum DX5i manual

    in Gadgets and Electronics

    Posted

    Thanks to the help her, I have now mastered the programming but the switch remains a problem.

     

     I can turn the set off by removing one of the dry cells but have now realised that this will not retain any of the programmed settings and it will revert to factory settings.

     

    I have taken the back off and loosened the PC board with the switch attached. I then liberally doused the switch with electronic contact cleaner and worked it on and off a few times. Unfortunately no improvement.

     

    A slide switch is a fairly simple component and, other than corrosion, it is hard to think what might be wrong. Do I have to consider unsoldering it and a replacement?

    Spektrum DX5i manual

    in Gadgets and Electronics

    Posted

    Yes I have now found it hidden away in the Adust section - not in the Wing Tail Mix section where I was looking.

     

    When all fails RTFM more carefully - even when it is only online!

     

    And BTW you can't just plug a servo into another socket in the RX with an AIO - it is all hard wired.

     

    Thanks to you all -problem solved.

    • Like 1

    Spektrum DX5i manual

    in Gadgets and Electronics

    Posted

    This would be an aileron to rudder mix which I am not sure is available in airplane mode. I can only find dual channel aileron, V tail and elevon mixing which I don’t think will do the trick.

     

    There is programmable mixing in helicopter mode. I wonder if I could adapt this ?

     

    alternatively, could I take the back off and swap the leads to the sticks?

    Spektrum DX5i manual

    in Gadgets and Electronics

    Posted

    Hi guys

     

    Thanks to you help I have been making progress. I more or less understand the programming of the Tx and have managed to get the AIO to bind and operate. But a couple of extra questions.

     

    1. The Tx does not seem to go off when I slide the switch to off.  So far I have had to resort to taking a battery out.  Is the switch faulty or am I missing something?
     

    2.The intended model (a Microaces SE5a) is rudder and elevator only - no ailerons.  Thus the rudder is operated by the LHS stick.   Can I switch this to the RHS stick as I am not sure I can retrain my reflexes to fly that way.

     

    TIA  david

    Spektrum DX5i manual

    in Gadgets and Electronics

    Posted

    I have acquired an unused example of the above from the widow of my deceased friend. Also two AR610 receivers but unfortunately no manual. I am normally a Futaba used so I am completely lost as to how to program this.

     

    Can anyone point me to a website where I can download it. I have Googled but only seem to come up with DX5e which seems completely different.

     

    TIA.

    Laser Engines - Technical questions

    in IC Engines

    Posted

    Hi Jon

    I have a Laser 150. A bit old but it has given me sterling service in a Flair 1/4 scale Tiggy.

     

    Unfortunately it let me down for the first time today. It seemed to lose power in flight but landed with the engine still running.

     

     I tried to restart but it didn’t seem to have any compression. Then I tried again (without the glow lead on ) and the compression was there. I flicked the prop many times and sometimes compression, sometimes not.

     

    My first thought was a valve sticking, but I have had the cover off and all seems well in that department. Is  there a piston ring which could be sticking/ broken?

     

    Is there anything a reasonable experienced amateur can do, other than send it to you?

     

    Thanks David

     

    Fuelproofing an ARTF

    in Hints and Tips

    Posted

    I am a big fan of Chris Foss and have got or had a Wot4 a Wotswot and a Xtrawot.

     

    Being a confirmed IC man, I find that after a lot of flying, they all succumb to fuel/oil seeping under the film covering.

     

    I am thinking of replacing the Wots wot and would like suggestions as to the best way of preventing this before I let fuel touch it.

     

    TIA  David

    Has anyone got a DB Tiger Moth plan

    in All Things Model Flying

    Posted

    I have just bought a completed Tiggy in Ebay. It flew beautifully for a couple of flights, but then I got cocky and attempted a manoeuvre too close to the ground.

    In the resulting meeting with terra firma, the cabane structure broke out of the fuselage. I am rebuilding it but need some guidance in this area.

    Can someone tell me the incidence of the upper wing or the exact lengths of the front and rear struts. Even better would be some photo or scan of the relevant part or the plan that I could download and print..

    Thanks in advance

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