No announcement yet.

Lou Andrews Aeromaster Too, from AAMCO kit, built for electric ...

  • Filter
  • Time
  • Show
Clear All
new posts

    I've cut the film away from the lodgings for the aileron servos and screwed in the servo plates...

    The film was cut diagonally, then trimmed with scissors. What was left was stuck down using this dinky little hot iron, which I found on t'ebay in the dress-making section..! Low power, no temperature control, but for rapid intricate detail stuff it does a fine job. Very low cost, and supplied with two 'feet'; this is the smaller of the two. Small enough to tuck under the skinning to stick the film on the underside of the sheeting, in some cases..! Well pleased, as it made a tricky task quite neat and tidy.
    One could also note the 3D-printed cover plates that I've prepared, which I'll probably stick on with double-sided tape, at least at first, once the linkages have been proven. Just an experiment, but they might protect the servo arms a bit.
    I'd passed the wiring through the wing beforehand, of course (apparently one shouldn't forget to do this..!), and tied a length of cord to the cables. Once the upper surface of the lower wing was pierced, the outlet holes are revealed. Again, the dinky little iron did well to seal down the edges of the film, and a pair of tweezers fished out the threads...

    These plugs will pass up, through the underbelly of the 'plane, to the Rx above.
    It's been checked before, but just to be sure, I've connected up my servo tester and confirmed correct operation of the servos; we can see that the servos move in opposite directions, as expected...

    I have left myself the possibility of having independant servo control at a later stage, but for the moment, a common command will suit my purposes, I think. Refinements of the sort can come later, after any successful test flights. Keep It Simple will do for now.
    I may get the ailerons attached this evening, if I can drum up some extra hands (and head..?) to hold everything in place. All of these filmed surfaces are now very slippery for these old insensitive fingers, and this will be a 'first' for me, using my laminating film as a full-width iron-on hinge. I've read a few accounts, and watch some videos, but doing it on one's own 'plane is, I'll admit, still a bit (no; a lot..!) scary. It has to be done sooner or later, though, so maybe later on today, if I feel up to it. We'll see...


      That small iron was my best friend for many years sticking down many varieties of model covering............and I use it and its big brothers for temporary tacking heat press vinyl to small cloth items ........except I don't have pink ones........gosh...........sigh.




          Plucking up courage, and assisted by Our Eldest, the ailerons have been film-hinged to the lower wing, first one ...

          ... then t'other ...

          It went off rather well, and all the better for having four hands. The film is transparent, but they're still visible when close up. There are the inevitable bubbles (the larger ones were pricked out, of course, but one can't do 'em all...), which show up more against the Transparent Orange than the White. Pleased enough, just the same. I'll have a go at installing the control horns and connecting 'em up tomorrow, probably. Another giant leap achieved..!


            Ailerons are now hooked up and tested ...

            They work as expected, throws will be finely adjusted under the auspices of more experienced Club members when we get closer to Maiden Day.
            On a roll, at the moment, so I continued, again assisted by Our Eldest, using the same brass curtain hooks (see Kirby thread for details...) to confection soldered wheel collars for the Aeromaster. Once again, the secret is in the cleaning, use of flux and a decent iron. Given these conditions, it was only a matter of seconds to attach the wheels; they're unlikely to come off on their own ...

            A bit tired, so some relaxation, in the form of applying Humbrol Gloss White to a few exposed parts, to clean up the general appearance (and protect the wood, of course...)...

            I've the cockpit to sort out (how to install a pilot, maybe a dashboard of sorts, a windshield, perhaps even some edge combing...), order a couple of suitable props 'I've 9's and 10's but only vintage-style wooden ones in 13 size...), and receive Rx's, ordered a while back. I have Rx's for my Turnigy 9x, but have since adopted the FrSky 'DJT' module, so as to be able to have Diversity Rx's. I have one already, installed in the Bixler; i'll be more confident in the range of the FrSky Rx's, but am waiting on delivery.
            I've also a stabiliser unit, currently in the Bixler too, which I will probably use, but I think the maiden flight will be with just a standard Rx, so as not to complicate things and cloud any issues.
            Next steps..? Once I have a Rx installed (either received or 'stolen' from the Bixler...) I can do a full-house test, and give the motor a run with the watt-meter, to see how it fares. It's a Turnigy AeroDrive SK4240-750, so should be able to turn a quite large prop. On paper, there's enough power; I've not yet weighed the whole ship; I'll do that this evening. For now, it's dinner time, and a bit of a rest.


              I've just weighed her, and got this...

              Weight = 2390 gr

              Fuselage 1140
              Upper wing 290
              Lower wing 390
              Sundries (U/C, Lipo, hatches, rubber bands, wooden prop...) 570

              There only remains the pilot (30 gr..?) and the Rx (about the same..?), so I'd be safe in saying she'll be just under 2.5 kg; that's 5½ lb in old money. Is that reasonable for this 'plane..?

              Did I mention pilots..? Here he is, freshly extruded (that sounds more rude than it actually is...), taking his first taste of joys to come. Why blue..? It's a reel of filament that's already open, so... The original file was downloaded from Thingyverse (thanks, ianicolo...); I've scaled him up to fit the 'plane, and hollowed him out, with a wall thickness of 1.5mm. It took 3½ hours to print in Draft mode...

              And here he is again, with a first coat of many colours (well, brown, really...)...

              Tomorrow, a windshield. I have a full canopy, but I think I prefer the 'old school', 'open to the elements' aspect with 'planes of the sort. Onward and upward.
              Last edited by Dad3353; 04-14-2019, 12:25 AM.


                No windshield yet; I have been diverted with other minute details. The pilot needs a floor beneath him, and a bit more detailed painting. I thought of making a tiny leather-ish headrest, but found a better solution, again 3D-printed from Thingiverse. That, too, needs painting. Then the idea of a dashboard got me searching t'web for models. There are 3D ones to print, but I decided that a 2D-printed one would do the job, so cut out a suitable rounded sheet, printed a dashboard onto sticky-back paper and cut it to shape. Here's a view of the 'kit' being processed ...

                ... and an over-the-shoulder view of the result so far...

                The seat will get another coat or two, but it's getting close enough to closure. Tomorrow then, maybe, for the windscreen..?


                • COCHISE99
                  COCHISE99 commented
                  Editing a comment
                  That is looking real good............3D printed exhaust manifold??

                No, this is not endurance training, nor gratuitous photos, just to show off my lump hammer; it's a way of keeping the pilot and his seat firmly held in place whilst the Gorilla Glue does its work...

                I've drilled 3mm holes through the base of these pieces, and equally through the balsa baseplate. I poked glue through these holes, and spread a thin film on to the bases. I'm thinking that the glue will foam and expand through the holes, and key the pieces together. The weighting is to encourage the glue to pop through the holes rather than lift the pilot or seat. It seems to have worked, as I can now lift the 'plane using the pilot..!
                On to the windsceen, at last. A carbon tracing is made from the template kindly furnished on the plan, and a gash piece of packaging plastic sacrificed for the cause. I've painted 'rivet' dots onto the inside of the windscreen...

                ... then, when dry, masked the lower edge and applied black paint ...

                The windscreen will be pinned to the hatch, with a tiny bead of silicone to seal it down. I've a shower cabin to re-caulk, and m awaiting for delivery of a tube of silicone for that; I'm sure there'll be enough for this little task as well. Maybe tomorrow..?


                  Still waiting for the silicone, so I've tried covering the nose motor hatch, using a method of filming over a curve picked up on another Forum. It's not evident from the photos (explanations offered elsewhere on the Forum...), but I must say that I'm impressed by the efficiency of the tip, which gave a superb result (well, superb for me, at any rate..!), with hardly a crease or fold at all. Here's the piece ...

                  ... and again, in its place on the nose ...

                  T'will be stuck on with the silicone, when it arrives.
                  Yes, I've chosen a radial engine for powering the 'plane; it's simply hung on for now, but will also be 'siliconed' in due course.