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Chris Walby

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Everything posted by Chris Walby

  1. Chris Walby
    Does anyone know your legal position (consumer rights), so if you were absolutely specific to ask if they had it I stock for dispatch and then clearly they cannot fulfil this within defined time. Can you then cancel your order and get a full refund? Do these suppliers need to be taught that this is an unacceptable practice. The problem is it has an adverse affect of suppliers who actually hold stock on their shelves or come clean and say they need to order t from their distributor (thus you know you will have to wait). I will have to go to the shed and bash some balsa just to calm down....well that's my excuse for my self prescribed modelling therapy!
  2. Chris Walby
    Hi, I'll take a look at what you have and see if I can help out (only been flying 4 years, but an electrical engineer for 35 years!). I have a TN DC3 on the building board & a couple Mosquitos + a load of prop testing data when trying to size other planes! It sort of all depends on which motors you picked which on the face of it look okay (I picked a 370KV for a war bird and ended up with a windmill up front).
  3. Chris Walby
    Carry on, very interesting....what's the spec?
  4. Chris Walby
    Does this count?
  5. Chris Walby
    SS, I have close to 200 hours of trouble free use of my TX on +10 different models and one issue which helpful contributors have assisted with constructive comments. As I have said before, stick to the OP if its constructive, if not don't bother posting (you said yourself there are plenty of other forums slagging off manufactures).
  6. Chris Walby
    Well this is my dilemma as I have always walked out the correct distance and turned to face the model with my aerial parallel with the top of the TX as I look at the model and check the control surfaces move correctly. It was only that no one else was at the field (nice and quite) that I could turn my back on the model and hear the servos work or not. I'll complete the testing proposed although the conclusion at this stage is: Old RX with known issue between RX & TX Model known to have screening issues High humidity, just about to rain I might not have turned to face the model and the tip of the aerial would have been facing the model Possible fault on TX All of the other suggestions I think are red herrings, but thanks to all for contributing as it fully explores the possibilities.
  7. Chris Walby
    I concur that the AS3X will struggle without ailerons so will be less beneficial + I have a cub type model where the rudder (at full deflection) tends to blind one of the elevators and thus produces significant roll to the extent that its easier to fly using either elevator or rudder one at a time....unless you want a barrel roll!
  8. Chris Walby
    Once again thanks for all of your suggestions and I think we can cross a couple of things off the list from my observations and lack of detail I put in the OP. I don't think it will be the on/off switch, firstly I was not playing with the trim switches! secondly the DX goes through a boot cycle with some bleeps to say its on, lastly the time reset. Good point about the TX and aerial connections (it had a frayed aerial at the hinge, which was replaced by HH FOC) a couple of years ago), so I don't bend it about, but will take an extra close look. Not knowing quite how old the RX is and that there seems to be a previous issue with AR500's and DX8's appears to be a bit of a coincidence. Now suggesting that I present a significant obstacle to radio waves is just offensive and how I laughed! I had a vision of new rules for who and how many can be allowed on the flight line depending on how absorbent to RF they are! Lastly I'll get my test rig and try out a selection of RX's between a couple of TX's and report back. PS.....Unless it was the "Offley triangle" striking again.......
  9. Chris Walby
    Hi As per earlier post on the Vulcan maiden, video on the link below, enjoy. **LINK**
  10. Chris Walby
    I would like to thank those that have contributed to this post in a positive way and can we please keep it on topic, cheers. As suggested I will try it with another TX on the two RX's and see what results I get + One comment from a club member was that the AR500 will be operating on DSM2 and to try the same test with a DSMX RX.
  11. Chris Walby
    I lost a model a couple of weeks ago (vertical decent into ground after failsafe engaged) Habu efd with AR500 RX & DX8 (old) which was quite a long way out but still clearly visible. So having glued it back together and asked a club mate to wiggle the sticks from the flight line and throttle up occasionally (don't worry fingers well away from the edf). and went for a walk to the crash site along the field track. I got nearly to where I lost it (bearing in mind the model was at waist height so worst case and it lost signal, on the way back but not until I was nearly in the flying field it linked up again So tried a range check, but it will only pass if I am facing the model at the reduced power setting and distance (as per TX instructions). I even tried a different RX better but only by a couple or metres. So questions are: Should facing away at a range check cause loss of signal? As its more than one RX showing the issue, could it be the TX?
  12. Chris Walby
    Yesterday was bright and sunny with a favourable wind and most of the club fliers up at the field. Having put the first fail down to insufficient thrust, too high AOA on the dolly it was plan B....Bungee With Dave (big thanks!) at the TX and the rest of the club moving their chairs to the flight line (no pressure then!) it just made the bungee pull into the air, then with throttle full up it pulled away with the bungee cord dropping away a few seconds later. With it trimmed in as much as possible Dave put on a cracking display with big low fly pasts. There are few lessons learnt, don't do overweight, pusher, underpowered with novel launch system models without a good bunch of club mates behind you! Few mods, decals and hope to get many more flights out of it. Thanks to the late Brian H for building it.
  13. Chris Walby

    Chris Walby posted a gallery image in Member Albums

  14. Chris Walby
    Okay cat out of the bag 6040 means 6 inch diameter and 4 inch pitch The reason for the zero.... so what is you have a 6045...well that will be 6 inch dia and 4 1/2 pitch Hope that clears things up ! Worth a look at the APC web site, things get fun with 3 blade pusher props!, but once you have the hang of its not too bad....now if I could only work out the difference in a wide, narrow and standard width regarding efficiency Edited By Chris Walby on 24/05/2017 13:27:11
  15. Chris Walby
    Bad bad people...you have reduced the cross sectional area of the battery cable causing a reduction in current carrying capacity, increasing the overall resistance of the circuit and upset the mighty spirit of electron flow! You are all doomed I say...doomed... Actually you are right ... it does not make a lot of difference if its a few strands and a well soldered joint will always be better than twisting them together and sticking some Selotape over the wires...
  16. Chris Walby
    As Overlander manufacture Lipo's and chargers I would say they know best! 35% it is (if you bother at all). I have heard that legislation (on contained energy sources during transport) is pushing new lipo storage capacities down (sub 35%), but that is not a restriction for you. If you asked Overlander, might be worth giving them a call
  17. Chris Walby
    ...just a couple of "non" scientific points 1 - Would the manufacturer not sized the motor & prop correctly, so we can assume its not overloading the motor or ESC, thus if its a low C rating or sick lipo likely to be the problem area 2 - Low KV motors (from experience) and low lipo cell counts (4S) puts you in an awkward area of ending up with big diameter props with large pitch ! I have a 370KV motor that can pull a 16 x 10 three blade and pull 26A (giving 2.2kg of thrust), big but here as some motors are not rated above 4S however I can take mine to 6S and get 48A (4.6kg thrust). Lastly my money is on the lipo...I had one go low voltage on one cell....It was 5S and read 97 % ,,,,, but look carefully and the lipo checker only displays 4 cells.... the other trick the lipo has one cell fails under load so the ESC detects say 4S when arming...then after a large drawn (take off) it drops a cell...the ESC detects low battery voltage and cuts/backs off the motor (although you should still have control) but without the big fan at the front working the only way is down! My conclusion...you won't get a big enough two blade prop without it compromising ground clearance + it will have a very large pitch....unless you up the cell count (if you can) or fit a higher KV motor
  18. Chris Walby
    And there was me thinking only the high tech equipment has "return to home" How wrong I was....all RX's with failsafe have "return to home" its just your definition of "home" My one would appear to have selected its original organic origins as its next destination for home Fast outward pass....getting a bit far away....1/2 roll and pull 1/2 loop, but at vertical EDF rolled back and no control surfaces..in vertical decent over field. Foam safe glue here I come
  19. Chris Walby

    Chris Walby posted a gallery image in Member Albums

  20. Chris Walby
    Hi, What size model is it as the FMS ones appear to be 1700 mm or 1440 mm wingspan not as OP? One recommends 6S the other 4S.....
  21. Chris Walby
    Good question! I have a HK Tristania that is running Wingspan 895 mm (35 inch) Length 845 mm (33 inch), Weight without battery 109 to 210, Motor T2006 1900kV Brushless Outrunner, ESC 12A, Prop 8 x 4 (8040 slow flyer) , Battery 860mAh 2S 25C (recommended 2S-3S 800mAh 15C) or 3S 800 mAh Must say I am a bit surprised that its a high KV, but then small motors tend to be? If that's any help, but I am sure the experts will chip in. Edited By Chris Walby on 10/05/2017 08:39:14
  22. Chris Walby
    Can someone tell me specifically what was unsafe? Departure into wind with a roll away from the flight line cross wind, all flying away from the flight line at a good height If anything was to go wrong the aircraft would be heading away from the flight line. If the pilot choses to roll/fly inverted/knife edge then these should all be within the envelope of this type of aircraft whether the choice is on the first flight or 10th it should be proven prior to a public venue.
  23. Chris Walby
    Dennis, I have a couple of models (no rudder) and a dolly with a RX with steering assigned to the rudder channel) so just wondering what I'll have to do assuming a DSMX will bind with a DSM2 or not... Steve J, thanks for the info...sort of as I expected Plan A will be to bind the two RX's the same (dolly RX & the plane with the same type of RX) and then try the other plane with the dolly RX switched off. I don't mind running a bind extension lead from the RX in each plane, but its not worth the faff taking the wings off every time I need to rebind the RX's to a different plane especially if a DSMX won't bind with a DSM2
  24. Chris Walby
    Tech question - Can you bind two Spektrum RX's at the same time e.g. two 6 channel Spektrum RX's - yes, but what if they are different number of channels? And what if one is DSM2 and one DSMX?
  25. Chris Walby
    Hi, Sorry to confuse you, but I would go the other way! Battery in fuselage (positioned as far forward + build it light at the tail end!) ESC's in wings or behind motors/in wheel wells, go for a slightly larger ESC (max current) and you should be okay. There is a long running debate about which leads should be extended or not, but according to a professional contact who makes ESC's, motors etc, they designed the issue out years ago! So don't worry + both of my mossies PZ & BH have extended battery to ESC leads and not had any issues. I think you will find a lack of room in the fuselage once the battery and RX are in there + trying to keep the ESC cool as well
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