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David P Williams

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Everything posted by David P Williams

  1. David P Williams
    Full size have a fibre disk between the wires that is stitched to them, not to add strength but to stop fretting.
  2. David P Williams
    Thanks Flight. Yes I know the tiny RX are OK. People have range checked them out to 2.5km+, so circuits at my club patch should be fine. I might use one tucked down the back of the fuselage with the main RX up front I'll go with the redundancy bus as it will give telemetry on the battery states just for additional comfort. It will be fed by two LiFes with two good switches, not the Powerbox one. No engine ignition as it's a glow engine, but it does have a glow driver with it's own (NiMh) battery
  3. David P Williams
    Yes, excellent work David. I'm enjoying following this build.
  4. David P Williams
    Modelfixings.co.uk have 3.5 mm bolts, screws and nuts. I think the 3.5mm is a hangover from when they were 4BA.
  5. David P Williams
    I'll stick with the original thanks. I find the lack of contrast between the grey background and text harder to read, even though it's larger.
  6. David P Williams
    Flight 1- thanks for the encouraging info. I appreciate that receivers with PWM ports are not needed, but I have this irrational thing about 'proper' hard cased receivers vs tiny bare circuit boards smaller than a postage stamp for 'proper' large models, although I know that the RB20 would be handling all the servo power. They just don't look as if they're up to the job even though the specs say they are. The model is this one and the servos are good old fashioned Hitec 645MGs. It should end up around 25lb AUW. Chris - As I understand the manual, the RB20 telemetry per channel is just a warning of low voltge (less than 4V) or that the overload has tripped (>10A). Ron - Yes thanks, I'm aware that the second receiver on the RB10 must have telemetry disabled. As for dual band - I think I'll be sticking with all 2.4.
  7. David P Williams
    Thanks chaps. The model has a big glow engine, so no ignition problems. I'm leaning towards buying an RB20 as ACCESS compatible firmware is available for it whereas the latest firmware update for the RB10 is from 2017. It can also do telemetry switching between the two RXs and has proper battery connectors rather than just solder pads. I've done a fair bit more reading this afternoon, wading through huge threads on other forums. The RB20 seems pretty solid after some glitches with early ones. I can even daisy chain additional RXs, like tiny M+ ones into each attached RX to act as extra 'satellites'. There seem to be plenty of people using them in big petrol engined models and jets with no problems. I think I'll test out the RB10 with a couple of my ACCST RXs and use it in my WotsWotXL to replace the Spektrum AR8000 it currently has.
  8. David P Williams
    I have been using Spektrum kit for my models since it first became available, but have also been using OpenTX on a Taranis X9D+ for a couple of years with a couple of models. I've now decided to change over to OpenTX for all my models over time, and have just bought a Horus X10Express which I like a lot, with a Jumper 4in1 module to run my Spektrum equipped models until I replace their receivers. I am currently building a large and heavy I/C powered model that will represent a significant investment in building time and money, and I'm trying to work out the best radio setup to use. It is only a simple 4 channel (well 5 with two aileron servos) model, but I would like some redundancy in power supply and receivers. I have an RX8R PRO ACCST receiver which states that it can act as a redundancy receiver when connected to another, and I have a spare X8R ACCST. I have an Archer R8 PRO ACCESS receiver which also states that it can act as a redundancy receiver when connected to another ACCESS receiver. I have a Powerbox sensor switch bought for another project but not used, to give a redundant power supply (I would use two LiFes). I have a second hand Frsky RB10 redundancy bus, but I don't really like trusting second hand stuff for this model. I don't mind spending more to obtain a robust setup. I have spent hours googling various forum threads, Youtube videos, etc but can't seem to find any useful info on the pros and cons (or even much detail on how to setup and test) using two interlinked receivers versus one of the Frsky Redundancy Buses. Most of the info seems to be quadcopter/FPV based and I haven't been able to find very much at all relating to 'traditional' model airoplanes, particularly large ones. Do any of you have experience in this area and could help with suggesting a suitable setup? (I could always stick with Spektrum and use a Powersafe receiver with multiple satellites of course?)
  9. David P Williams
    OK thanks chaps. I'll try it with an old hack model first I think and see how we go
  10. David P Williams
    Hi all, I have a HorusX10 Express (OpenTX) and I've bought the Jumper 4in1 for my Spektrum equipped models. All seems good, they bind and seem to work fine. I have a question about range checking when we can get back to the field and actually fly. Does setting the range check in the Model settings in OpenTX reduce the transmitted power from the Jumper module in the same way that it would for the internal module? None of my Spektrum RXs have telemetry so I obviously won't have RSSI but will rely on the old 'walk away until things stop moving' test. Does it all just work as it would with my Spektrum TX?
  11. David P Williams
    Yes I already had my default stream set up to do this but it's handy having this one click access from any page
  12. David P Williams
    Me too. I've been a bit dismayed by all the moaning and grumbling about the new numbers, but I think I'm about to join them
  13. David P Williams
    Just put "Flair Kite" in quotes like that.
  14. David P Williams
    Would just like to add my thanks to the team behind the site migration. Works well after the early hiccups and now I've found my way around. I'm another old IT veteran so I know what's involved.
  15. David P Williams
    Yep - wife and I (65 and 69) booked in for midday today at our local docs. We've been a bit behind the game here in South Shropshire but they've caught up quickly.
  16. David P Williams
    But you are using the claim that it is 'work' to justify being out flying your fixed wing foamboard stuff during a 'stay at home' lockdown, so that is flying for financial reward not 'Sport, Recreation, Education or Demonstration'. Can't have it both ways.
  17. David P Williams
    Yes - Balsa Cabin, I've got yellow, green and blue for colourful building.
  18. David P Williams
    Bonzo - this forum is full of frustrated flyers who are following the lockdown rules and not going out flying, so posting videos of you flying with thin excuses about it being 'work' for you ( i.e. you are flying for financial reward) is bound to get peoples' backs up. It's just like the stupid Youtube "influencers" swanning around Dubai on holiday claiming it's "work".
  19. David P Williams
    Now built and sheeted the centre section, and been doing a few time consuming jobs. I wasn't too happy with the end ribs on the centre section, they support the wing joiner and are bolted to the cabane struts, but they are fairly well fretted out and didn't look strong enough, so I cut non-fretted versions from 3mm ply and laminated them to the kit ones. Seems pretty solid now. There are a load of vac formed parts in the kit, including the fairings for the rear corners above. The usual fiddly careful trimming to get a decent fit. The cabane struts are suppiled pre-bent, and are pretty accurate with just a litle tweaking needed. They are 3/4" x 3/16" aluminium or dural and look a bit agricultural. The full size has streamline tube struts, so several hours with files and emery has them looking a bit more realistic. Next job is lots of tweaking, eyeballing and adjusting so that the centre section is parallel to the bottom wing from the front and from above, and at an incidence of 3.5deg to the main fuselage longeron, before careful marking and drilling the bolt holes to line up with the captive nuts already in the centre section.
  20. David P Williams

    David P Williams posted a gallery image in Member Albums

  21. David P Williams

    David P Williams posted a gallery image in Member Albums

  22. David P Williams

    David P Williams posted a gallery image in Member Albums

  23. David P Williams

    David P Williams posted a gallery image in Member Albums

  24. David P Williams
    ...and another vote for Nexus (and Graham our postman). Ordered midday yesterday and arrived 11:00 this morning.
  25. David P Williams
    Some appeared on Ebay here
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