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Martin Harris - Moderator

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Everything posted by Martin Harris - Moderator

  1. Watching these posts with interest as I should be picking mine up tomorrow.
  2. To be fair to Peter, I did raise the possibility in the first paragraph of my first reply! 😝
  3. They've been almost universally adopted on high performance full size gliders at significant cost so there may be measurable benefits on larger models. To my mind, they are an ugly addition to the beautiful clean shapes that competition gliders evolved to in the glass fibre age.
  4. Made a lot easier by another's experience a week or so ago!
  5. As a wise man once observed, there are no stupid questions, only stupid answers! It's an easy mistake to make if you are used to connecting the battery to a dedicated slot - although as you probably know, it's only for convenience as the power rails are commoned in the receiver.
  6. I think you have the lead in a socket marked VCC? This is not the throttle channel. Funnily enough, someone else new to electric power made this mistake very recently. Unlike an IC setup, the ESC needs to power the receiver through the channel that supplies the throttle channel position data. I believe this is channel 3 on this radio.
  7. Perhaps post a picture of your setup so that we can see what is plugged in to where. I assume you’ve connected the ESC lead to the throttle channel? I can’t say for certain but I think this transmitter complies with the normal direction - Futaba kit needs the throttle channel reversing before starting the process. You may need to train the ESC to the throttle channel - most require you to connect the battery with the throttle wide open, wait for the beeping sequence to stop/change, NO PROPELLER FITTED PLEASE, and then close it. The beeping stops/changes once it’s complete. Best to go with the ESC instruction leaflet which will hopefully have been supplied.
  8. You should be able to use any similar spec. servo. Just be aware that there are variations in quality so look for a known make. If you go for Hitec you will probably need to reprogram your transmitter to reverse them but whichever you use, check for correct movement before flying!
  9. We don’t normally use fully sealed bearings (there might be exceptions of course?). Some front bearings can be replaced with 2RS bearings but always with the inner seal removed. I would normally replace like for like though - air leakage may be a problem for two strokes and four strokes without rubber seals may possibly be designed that way to encourage internal air/oilflow through the tappet area. The rear bearing would normally be open as it needs all the lubrication it can get - especially with four strokes. On the other hand, I believe that even 2RS bearings aren’t truly sealed - the seals are only clipped into place.
  10. All I can really report is that I haven’t had any failures, problems or concerns with any I’ve fitted. Mostly OS and clone single cylinder 4 strokes ranging from 20 to 120 and a Laser 62
  11. They have my vote too. Very often orders have arrived the next day. Good choice of bearings too - whether right or not I’ve tended to go for C3 bearings recently (slightly larger clearance) which I’m led to believe are better for high speed/temperature use.
  12. If you can navigate to where there’s a symbol like a hex nut (probably after clicking the head and shoulders icon) and click on it, language is the fifth item down.
  13. Hi Eduardo and welcome. I'm assuming your first language isn't English as your post looks rather like AI generated! However, I believe this is a genuine enquiry about your Graupner charger so I've passed it to the forum in case anyone can help. I think you would be best off contacting Graupner directly although this may not be as easy as when they were based in Germany.
  14. It’s nothing The Holy Hand Grenade of Antioch won’t sort. Lobbest it at thine foe, who being naughty in mine sight, shall snuff it….
  15. I’m guessing you mean it has one servo for each aileron Dave - 4 servos per aileron would really make it a beast! If everything is identical mechanically then perhaps there’s something in the transmitter mixing that’s limiting movement? Easy to check by swapping one or both side’s servo connections i.e. top to bottom and seeing if the reduced movement is swapped.
  16. I’m not sure there’s a one answer fits all to this question. It will depend on many factors specific to the model so the best thing is to test fly and adjust differential to suit your taste. The Tiger Moth, for example - although without top wing ailerons - has almost no downgoing aileron but still needs rudder to coordinate turns. Perhaps others may have flown the same model and can offer pertinent advice?
  17. If we have a Spanish speaker who wants to assist, could I suggest they PM Jose to establish what he wishes to clarify and perhaps post on his behalf. I’m afraid the forum CoC specifically requires all posts to be in English so posting the original text is not an option.
  18. A good reason to measure rather than rely on listings.
  19. I’m not sure what’s given the impression that I’ve recommended adapting anything other than an unobtainable bearing. I thought I’d clarified that in my reply to JD8!
  20. This was for unobtainable sizes John - sorry, I should have made that clearer.
  21. I don't know much about the Webras but a couple of makers have used non-standard bearings in the past (at least one was a mixed Imperial/metric specification). Advice from Irvine was to source a bearing with the correct outside diameter and thickness and a larger bore - then make a sleeve to adapt it.
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