Jump to content
Please be aware of scammers when using the Sale/Wanted forum areas

Tim Ballinger

Members
 View Profile  See their activity

  • Posts

    1,178

  • Joined

  • Last visited

 Content Type 

Everything posted by Tim Ballinger

  1. Tim Ballinger
    While compiling my spreadsheet of likely solutions I eventually found a current consumption quoted . It was for the Corona DS919MG - a 12g servo in the class I am looking for albeit the Torque at 1.7 is a little low compared to others. However the quoted current consumption is 200 -240 mA. So at 4 servos all waggling its only around 1A which is well within scope of most SBEC or esc/SBEC combinations. I am therefore going to assume all in this class will be similar. Tim
  2. Tim Ballinger
    Don, An interesting observation. If such a phenomenon exists I guess the nature of the beast is that any evidence for such failures would be difficult to come by. If a subsequent failure in the drive train did occur it would it not be the same as a plastic gear failure anyway so perhaps no greater a risk ? So from the replies I have had I think I see support for the 9- 17 g class of servos for electric flight with no failure trends noted. I see the digital versions in this class producing higher torques (3-3.5 kg.cm) than previous at wider voltage ranges (4.8 - 6) being typical. Corona and Emax servos have been called out as good as of course as Hitec. Best value in the class I am looking at is another question but there has been a suggestion that some folks are having no problems with the cheaper offerings on the market. Following one link to Airtek ( a shop I have not really visited before) I have also started looking quite favourably at K-Power servos. Thanks for all the input I shall definitely be going with sub £10 mini ( 9-17g) digital ; just not sure what make yet. Tim
  3. Tim Ballinger
    Geoff, you are in the same weight bracket as Steve Nash’s JP and he has now got his to fly away so with max cheat intake size you should be ok. Fingers crossed 🤞 for your maiden. Tim
  4. Tim Ballinger
    John, Good shout as they say on question of sport. The Rapid Rc film does look the same. Stock levels seem good and delivery sensible prices. Perhaps they have done a deal with HK’s supplier. I shall be giving that a try. Tim
  5. Tim Ballinger
    Hmmm, not picked up on this thread before. I have so far only used the Easycote light. It was fine but the colour a little anaemic. Possibly because it was the ‘light’ option. Other than seemed ok albeit not so comfortable as HK. However with HK never in stock I shall try the ‘full’ easycote and see. Tim
  6. Tim Ballinger
    Yes HiTec were my go to servos but beginning to wonder if I am just paying for the name. Perhaps it’s because I just fly electric now and as has been mentioned the vibration environment is so much more benign that failures are rare. I also take Erfolg’s point about hangar damage but I have to be honest and even though I know you shouldn’t I will often push back a control surface following a knock rather than wait for power up to recenter the servo. Still not had any problems though........   Tim Edited By Tim Ballinger on 08/03/2020 17:38:46
  7. Tim Ballinger
    Real shame the way HK is going. I really like HK film although I always waited for the UK or EU warehouse to stock what I needed for the reason you quote. Now I have given up hope and am using Easikote seconds. Tim
  8. Tim Ballinger
    Interesting you mention Emax servos Andy, I was looking at those on one web Site ( one I consider reputable) and see they have replaced the mini (17g) Analogue Emax with one of their own branded Mini digitals . Not sure whether that implies equality or superiority but thanks for the Emax endorsement. Tim
  9. Tim Ballinger
    Ron , interesting comment re centering. I get the feeling that the new cheaper digital servos would be better at precision centering and holding than a similarly priced or even more expensive analogue. Tim Edited By Tim Ballinger on 08/03/2020 15:34:04
  10. Tim Ballinger
    Choosing servos is something I always seem to agonise over and it never seems to get any easier. Last discussion on which servo I can find was started by Tim Macky some 10 years ago but we now seem to have a new breed of micro/ mini digital servos on the market at very competitive prices ie under £10. They claim to offer 3 - 3 kg.cm torque which puts them right in the pocket for the 3-4 lb sport model. Current draw never seems to be quoted but difficult to believe at this size that they are in the area of troubling our power supplies. Durability? Well they come with metal gears and I am yet to see anything negative written. In the 5 years I have been back in modelling I have only had 1 servo actually fail , a 17g cheap (analogue) Chinese version that came with model. The rest are still going strong. Despite this, for my builds, I still tended to opt for standard size and or better known makes where space/budget permitted. I recently tried the cheap micro digital variety in a Mini jet. Too early to tell if they will last but makes me think seriously about the mini versions for my next model. I guess what I am seeking opinions on is ; is it still valid to pay 2- 3 times the price for what was once seen as a quality servo when these new cheap, mini digitals are on the market. Tim
  11. Tim Ballinger
    Dick, You are absolutely correct I got my pole pairs confused with poles. I guess i managed to count 6 magnets and never divided by 2 before entering the data. Should have done the kv check sum like yourself. So all my rpm numbers needed multiplying by 2 which i think would give me a peak of 49,000 rpm. Tim
  12. Tim Ballinger
    Dick, I set up med rate with the deflections Tony suggested in his build notes and a bit less and a bit more either side. I have 10 % expo on all settings. I felt no need to change from the med rate settings on my first 2 flights and had no dramas and twinkle rolls certainly seemed to twinkle. if you do not have the article I can dig it out but can not remember the actual numbers other than they are very small ! Tim
  13. Tim Ballinger
    Dick, Very smart and you have done well on the weight. It’s going to go like a rocket 🚀. Tim
  14. Tim Ballinger
    Peter, Glad it went well. You lost me with the half crown reference . Turns on a sixpence I can do and I certainly remember half crowns but together in one expression ? Tim
  15. Tim Ballinger
    Geoff, wire extensions from the ESC to the motor should be ok. It’s from battery to ESc where you need to take care. I have large extensions from the two ESC’s on my twin and have had no problems. Shame about the 🐇 hole. My u/c will be my first attempt at a homemade carbon fibre set. Secured through 1/8 lite ply into a 1/4 ply plate underneath. I even kept Peters ply side reinforcement pieces to spread any load . 🤞 Tim See Martin beat me to it ! Edited By Tim Ballinger on 06/03/2020 15:28:50
  16. Tim Ballinger
    Geoff, In that case sounds like your fan survived and you will be good to go with a new ESC. Wrong thread I know but have you flown your oodalally yet. (Just completed the fuselage on mine ) Tim
  17. Tim Ballinger
    Geoff, Sounding much better but if that is max amps it sounds a little low compared to my results and you will be needing the maximum thrust you can get if other folks JP’s are anything to go by. Tim
  18. Tim Ballinger
    Geoff, That sounds bad. My same setup was max 42A . Results a couple of pages back on this thread. Your choices are going to be limited, bad esc or bad motor or possibly both if the motor really took that much current. No ideas just commiserations . Tim😪
  19. Tim Ballinger
    Mike, Many thanks for the update Mike. Tim
  20. Tim Ballinger
    Bob, Thats pretty much as I was thinking/expecting. Thanks for the info on new Rx purchases. Tim
  21. Tim Ballinger
    Does anyone know if the D16 access firmware update story has progressed at all. I see no new firmware listed since this all started on 16 Jan. Nothing new on the FrSky site . Nothing new on RC group chat either that I can see. I have still not implemented the upgrade but am about to buy a new Rx and was just wandering what firmware they will be sold with. Perhaps I’ll drop a line to T9 if no one on here knows the status. Tim
  22. Tim Ballinger
    Fully cured and sanded down to size. Certainly tough stuff, thank heavens for a permagrit block. I am pretty pleased if decidedly annoyed at my foul up with assembling the mould the wrong way round. The edges are not as perfect as I would have liked as a result of the unequal compression but the result is certainly strong and has some spring. I have enough materiel to make another and aim for something closer to perfection but I shall rest with what I have for this model and give it another go on the next. Thanks to Mike Freeman for the inspiration and it was definitely satisfying to make something I didn’t think I could. At the same time it makes you appreciate the skill that goes into professionally made products and perhaps I now consider them better value for money than I did before. Tim
  23. Tim Ballinger

    Tim Ballinger posted a gallery image in Member Albums

  24. Tim Ballinger

    Tim Ballinger posted a gallery image in Member Albums

  25. Tim Ballinger

    Tim Ballinger posted a gallery image in Member Albums

×
×
  • Create New...