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

Mark Agate

Members
 View Profile  See their activity

  • Posts

    187

  • Joined

  • Last visited

 Content Type 

Everything posted by Mark Agate

  1. Mark Agate
    The Devo 12s instructions are appalling. I couldn't fathom how to bind the Tx to the Rx until I'd watched 2 different YouTube vids on the subject. It's nothing like a Spektrum in that respect. I don't think I ever will need 12 channels, and I freely admit I mostly bought it for the pose value. But at about £250 inc p&p it ticked all the boxes for me.   Edited By Mark Agate on 01/08/2013 11:08:35
  2. Mark Agate
    Depends on the price point you're looking at, and what you want to use it for. I've just bought one of these: **LINK** Flew with it for the first time on Sunday. Very impressed!
  3. Mark Agate
    Yes, he shouldn't really be flying naked if he's not experienced with a taildragger...
  4. Mark Agate
    Posted by richard cohen on 15/07/2013 22:24:15: filmed at Savernake house in Wiltshire.....i know coz i was asked to be the pilot but had to second the job to another club member as the final filming date was in the middle of a family holiday at the coast and my missus didnt seem keen on me driving back for the day to do the filming. there goes my 5 min of fame ! If it had been me... Goldfrapp and nudity.... the holiday wouldn't have got a look-in.
  5. Mark Agate
    Posted by Andrew767 on 15/07/2013 21:38:10: Posted by Mark Agate on 15/07/2013 19:40:42: Brings a new meaning to the expression "nude modelling" I suppose. The only other instance of model aircraft being used in the music industry which I can think of, is Hergest Ridge by Mike Oldfield: **LINK** Stardust .. Music sounds better with you......Has a glider being built and flown....Banging choon too! Andrew Thanks - I found a link to it: **LINK** My education is complete!
  6. Mark Agate
    Brings a new meaning to the expression "nude modelling" I suppose. The only other instance of model aircraft being used in the music industry which I can think of, is Hergest Ridge by Mike Oldfield: **LINK**
  7. Mark Agate
    It's a bit raunchy, so YouTube may ask you to confirm your age. Hope the mods think this is acceptable, but I'm sure you'll agree that the use of the Wot 4 is artistically necessary. My wife said she might have been a bit more interested in learning to fly if I'd taken this approach.
  8. Mark Agate
    Just about to head out with this for the first time: Hobbyking SPAD XIII, 700mm span
  9. Mark Agate

    Mark Agate posted a gallery image in Member Albums

  10. Mark Agate

    Mark Agate posted a gallery image in Member Albums

  11. Mark Agate
    Hobby King T45 Goshawk, with the stock motor, fan & ESC as supplied. Maiden flight last weekend - surprisingly quiet & jet-like sound! Looking forward to flying it again this weekend.
  12. Mark Agate

    Mark Agate posted a gallery image in Member Albums

  13. Mark Agate

    Mark Agate posted a gallery image in Member Albums

  14. Mark Agate
    Surely the most unfortunate name for RC gear since Sanwa did the STAC system ??!
  15. Mark Agate
    OK, it's only a dummy at the moment, but even so... **LINK** I want one!
  16. Mark Agate
    Depends if anyone can think of anything bran new to say.
  17. Mark Agate
    When Benedict Cumberbatch has to make his entrance, does the director shout "Cue Cumberbatch"?
  18. Mark Agate
    All the gear I worked on was 1.5ms centre. I don't think Fleet ever used 1.3ms centring, though the range of pulse widths (throw) may have been different to other manufacturers.
  19. Mark Agate
    If the white wire from the battery pack has power on it, this was the standard way we wired them when we did the first Fleet PCM system (I wrote all the software, and worked closely with Derek on the hardware design). The first system used an NEC 80C48 processor, which had a low-power sleep mode. When the system was switched off, the processor still had this extra supply in order to remember its failsafe settings. It only drew a few microamps in this mode, so it could remember them for over 6 months. The later receivers (for the MX-7 and Omega systems) used PIC processors, which had an EEPROM memory. This enabled them to remember the failsafe settings without an extra power supply, so the white wire became redundant, but was still connected on the battery for back-compatibility.
  20. Mark Agate
    Ah, you've met my wife then...
  21. Mark Agate
    Before charging, if the balance leads are connected in parallel, a cell in the good pack may be struggling to charge its counterpart in the other. As soon as the charger is switched on, it takes on the job of raising the cell voltages to the required levels, so the cell in the good pack then isn't stressed. More current will naturally flow into the lower voltage cell than the stronger one, until the two cells are at the same voltage. They will then rise in voltage together. Charging like this is fine (I have charged 6 1S packs in parallel for a micro heli), but discharging 2S or more packs with the balance leads connected carries more than one possible disadvantage, and no real advantage.
  22. Mark Agate
    I won't fly with my balance leads paralleled for the reason I explained. Balanced charging is a good idea, but paralleling the balance leads for flight is not. Ideally our ESC would look at the individual cell voltages, and cut out as soon as any one of them went below the danger level. This is just too fiddly to arrange though, so balanced charging and looking at the total pack voltage is probably the best compromise we have. If any one of my cells fails, the last thing I want is for it to take any of the other ones with it.
  23. Mark Agate
    You run the risk of one bad pack wrecking the other. If a 3s pack is used on its own, but one of the cells is not up to scratch, the pack will lose its voltage quicker than it used to, ending the flight earlier. If two packs have just their main power cables connected in parallel, discharging the combined pack may still flatten the weaker cell quite quickly, but the good pack will be relatively unaffected. The flight will not last as long as if both packs were good, but all 3 cells in the good pack should have discharged to roughly the same level. If the balance leads are paralleled, one cell in the good pack will be more stressed in order to maintain the voltage of its weaker counterpart when under load. By the time the combined pack gets down to a voltage where the flight has to end, that cell in the good pack will have been flattened as much as the weak cell in the other pack. If it is discharged down to a dangerously low level, the good pack will now be wrecked.
  24. Mark Agate
    High on the list for "other" causes should be bad hand launches. The worst (most expensive) crash I had was due to a club official deploying the peg system while I was flying, without giving me the peg for my frequency. I bought a 2.4GHz set after that.
  25. Mark Agate
    Hmm, can't remember how he did - would have to check my RCM&Es in the loft. I don't think you could really call it a serious competition model (he may have needed a thermaller at short notice if he'd pranged having entered the W/champs!). I remember a couple of guys in the club had them though, and they were pretty good by 1970s standards.
×
×
  • Create New...