911hillclimber
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Everything posted by 911hillclimber
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What a faff! All working perfectly now, Not at all sure what I've done, but KS made me think harder! It is all to do with the 'off' throttle position and the throttle range. Anyway, I'm going to write down all the settings off the Tx for future reference in case thing go off the cliff edge again. Found a small old model airplane with a Co2 engine in a cabinet yesterday, clean forgot about it. My first thing bought off ebay no less. It looks a bit injured, but restorable. Will picture it tomorrow on another thread...
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Yes, totally correct. I now have absolutely nothing responding to the left stick and the throttle. No beeps from the motor etc. I've re-calibrated the ESC as per 4-Max instructions, set the cut-off to switch 23 (top left switch at the back). The switch works, one position the stick shows no indication of movement, move the switch and you can see the stick's response on Servo Set-Up. The servo set up screen shows the throttle at -101, range is 100/100. I've tried the 'off' position at -129 and nothing changes. It is as if there is no signal going from the Rx to the ESC/Motor and I simply cannot see what is doing this. Now just going round in circles with the dam thing. Just what have I got wrong?
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Yet another 5 steps BACK this morning! When will this radio ever end? Decided to fit the motor permanently today, pulled the motor wires from the esc to route them correctly. Re-connected the motor, wires probably in a different order. The throttle did not work ar all. It has been perfect for a million trials up to last night. Got it all out of the plane, charges the batteries etc, removed the servos from the Rx. Spent ages trying to get the motor to respond to the Tx, nothing. Motor would sometimes give a single beep at regular intervals of about 3 seconds. Goodness knows what that means. Had lunch and tried again. Nothing then for some reason it gave the usual 3 beeps then followed by 2 more. (it did this when I got it going a few weeks ago, and has done it on every start-up since) The throttle responds to the stick and turns off. The motor even rotated correct direction. HOWEVER, when I switch the Tx off and the system has 'died-off' the motor will restart at quite low revs, constant speed. You can stop this by disconnecting the battery in the plane or by turning the Tx on. I've had this before, but can't think how I stopped it but it might be the motor cut-off trim level, but any thoughts? I've checked every lead for intermittent connections.
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Take your point, but there are two small planes on the 4-Max site... not sure Mrs Hillclimber would approve. Im avoiding the garden only because it's raining......
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I did check for warp in the main wind on the flat of the building board after ironing everything, one is warped by about 2mm and the other side a little less. Not sure if they were flat as in flat off the board as the basic balsa build. The truth of the wing to tail wing is good, but the fuselage is yet to be covered fully. It was tedious pinning the hinges in. I cut the covering at the pre-drilled positions from the underside on the tail plane, balsa cement in and pressed the pin home, all were good tight fits, pins cut from hardwood round. I then sealed the cut with balsa cement locally. While I wait for the covering to arrive the motor will be bolted in. I think 2 deg side thrust is about right, ie with the plan view of the plane, motor at '12 noon' the motor shaft at 2 deg clockwise..
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Interesting! They are very nice lathes. The round Bed design I think is younger than the longer flat bed designs. I think mine was a treddle powered unit converted to single phase motor in the 50/60's. I retired a bit early, and part of my 'present' to myself was to get a small lathe (I had exclusive access to a perfect Myford Super 7 at work). This Drummond Round Bed came from the back of an old garage in a small village in the Lake District. 'Old Joe' had just restored it (ie painted it drab green hammerite) but the lathe was good. I welded up a solid stand for it and love it. Fabulous to have access to a nice lathe. Used it a lot on many projects over the last 5 years. The prop spinner came out nicely, a snub-nose shape rather than the racey conical nut that came with the motor.. Time to fit the motor and ensure the prop goes the right way before the covering goes on the nose areas. Edited By 911hillclimber on 18/03/2020 17:08:48
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Bit of an up-date. New servo from 4-Max is good and the radio works great, just as I want it, left stick throttle, right stick rudder/elevator. The wing and some of the fuselage is covered, and teased that small wrinkle out of the wing too. Doped the bare balsa of the none to toughen the surface ready for the Humbrol paint, and about to machine a new prop spinner/nut in a more period look on my 1944 Drummond lathe, lovely thing. Decided to rubber band the rear section on rather than glue, there is a small glue area once the covering would be cut away, so feel better using bands. Finally, doped the actuator control links from the servos to the surfaces to toughen those up to. So, a lot of progress with just the main frame to cover, paint detail and final servo fit-up. Some pictures for you:
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Well, the wing took 3 hours to cover! Felt like forever, but, all done and I'm dead chuffed with the result. just on cluster of wrinkles that will not budge but only cover about 10mm x 10mm on one wing tip, top surface of course... Question, the centre section that has the elastic bands over it seems a bit fragile or me, should L double cover it? Irritatingly, mis calculated the cover needed to do the plane, so just ordered some more of the same which stops play for a few days. 4-Max sending a new servo today, so that should bring the radio together. Maybe I should order another kit to tide me over the virus period..... Pictures tomorrow in the sun.
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No need for you or anyone to say sorry, maybe I should for this l o n g thread! My approach on the gently under cambered wing is to tack to the root rib at the spar line. Tac along the spar line 1/3 of the 1/2 span and then 'line-iron' along the spar length to the tip. I've cut a thick piece of card with a 6mm slot so the heat of the iron generally will not shrink the surface of the material. Then work out and along the ribs to the trail and leading edges. Secure the covering to the wing tips and the leading/trail edges. Do this on both sides. Do the top in the same way but not along each rib. Both sides done, shrink the surfaces smooth. Cover the central area where the bands will bear top and bottom. Then: Have a glass of red wine. I will have deserved it.... Will post some pics if it looks good enough to pass muster with you experts.
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Didn't know that, but not surprised. Real feel of quality about it. looking forward to the challenge of the wings. getting the camber rib by rib of the underside and wrinkle free will be fun.
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Good to read about the covering, the old STOL I bought from a work friend in the late 80's was obviously covered in it and the same colour. hope I've bought enough...
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Paul..it's Graham! have to say what I felt was going to be hard turned out (so far) to be some of the most satisfying hours I've spent on this plane. I can still remember the tissue and dope days higher than a kite and warped wings! iirc some have said this material went out of production some time ago? Mad!
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Almost scared to say this, but that went well.. Really did. What a great material ORATEX is, so easy to handle and apply. Iron worked really well (£26 of ebay) and really did everything. Not a wrinkle in sight and only one very small scorch on my finger! With this confidence, main wing tomorrow.
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It is a 3 meter sheet of ORATEX I have. Great colour and sheen/texture, it will suit the plane no end. That Junior 60 in the last picture looks sooo good. Hope to take a similar picture soon. I will try the DIY approach today/tomorrow, but I have a good feeling about doing it. Might post differently in 24 hours time... What a beauty of a Buccaneer this is!
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Just got going on a dummy part of balsa. The covering is ORATEZ from Germany, an olde English Ivory. Really impressed how you can tac and then even it out. Just watched a few YouTube vids using this covering first but feels good today, so will press-on. Not rushing as it may hamper things later.
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Tested the suspect and good servos this morning using the servo tester. Good one is good, suspect one does not work, behaves as it has in the plane. So, duff servo. Sending it back to 4-Max, hopefully will have another soon. Would love to take it apart and have a look, but that would be wrong. Pre-owned iron arrived yesterday, looks brand new, so while I'm waiting for the radio, time to tackle the elephant in the room. Going to start with tail surfaces as any cock-ups can be removed readily or a new frame made readily.
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That's what I've done Peter, simple so even I could do it. works! Graham.
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All sounds good. Despite this massive thread (sorry) which shows my lack of aptitude I do like to sort things out myself, but right from the outset I knew I would need some guidance, and such guidance has been superb. I think you all for your patience, bet some have been amused by my efforts! 4-Max have been in touch asking me to do a few simple tests, just done that and emailed George. Just caught Penn Models (local shop) and now have one of those cheap blue servo testers. Been grafting at our Club's race track today, but will test both servos tomorrow. I hope the Tx set-up will be good. Left stick throttle, nothing left to right. Right stick elevator/rudder. Sounds simple to me...it needs to be! Way back in the 60's a rich mate of mine built a Super 60 with a huge Merco and a single channel McGregor radio set and crystal, or similar radio. Gold painted Tx case iirc. This radio system was just reaching the shops, fabulously simple. Can't remember if it had throttle control and rudder only. However, he still has it.....and is watching me carefully. Might get him to the field this year if we are allowed to get together anywhere at the moment.
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Thank you David, that was my understanding. Ive set the Tx Rex to have aileron on side to side on both sticks, but plug the rudder servo into channel 2 on the Rex and this gives me throttle only on left stick and Rudd.elev on the right. phew, that's just got to be it. Just need another servo now.
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Just to take stock. I have set things so I have left stick..motor up and down, nothing left or right right stick..rudder and elevator Is the uk norm.. left stick motor up n down, rudder left.right right stick elevator only up n down?
