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Frank Skilbeck

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Everything posted by Frank Skilbeck

  1. you could charge it on the way to the field from your cars USB port, plus if you have a mobile phone charger that will typically have a USB socket on it. And my main workshop charger also has an additional USB socket on it too.
  2. Note all modern receivers are fine on 4/5 cell nimhs or 2s lipo/life batteries, but unless the servos are HV you can't use a 2s lipo to power the servos without an BEC to drop the voltage. Some older servos, e.g JR 517s are only suitable for 4 cell nimhs. I typically use 4/5 cell nimhs or 2s life batteries in my IC models. Note we used to go flying all day on a 4 channel sports model with a 600 mah 4 cell NiCd.
  3. And Spektrum, bit surprised your charger didn't alarm reversed polarity.
  4. As Philip notes, but an IC engines efficiency varies with load and rpm, at high load at peak torque it produces the most power per unit of fuel, away from that it uses more fuel per unit of power, so although if it takes 4x the power to go 2x as fast it won't take 4x as much fuel as the engine is more efficient at higher loads, you might even be able to find the brake specific fuel consumption for your engine, but this fuel map is one of the reasons more and more gears have been added to autos to keep the engine running as close to this sweet spot as possible.
  5. Almost a canard eh 😉 But I had similar with a Fokker D8, changing from a 4s to a 3s battery, same prop, made the model more pleasant to fly.
  6. Actually the Earth radiates heat, without greenhouse gases we would be at a toasty -16 degC, as most of the heat from the Sun is radiated back into space, but this infra red radiation excites some molecules, namely H20, methane and CO2, which in turn heat the surrounding air. And just about all carbon based fuels end up being turned into heat, a typical IC engine turns over 70% of the stored energy in the fuel into heat, well it actually turns 100% of it to heat but then turns less than 30% into motion.
  7. The giant deepwater concrete platforms are a bit of a North Sea speciality, mainly due to the deep water fjords in Norway where they could be built and connected.to the topsides. The did manage to.sink one in the fjord when.the ballasting system failed, it registered around 6 on the richter scale when.it hit the.bottom if I recall. But onshore facilities usually have fairly substansial concrete foundations too and as noted every well world.wide will have its various strings of casing cemented in place. A cost per unit energy produced would be interesting as well as total CO2 released per unit of energy produced too, including the construction, extraction, conversion and delivery to the end user. There's an interesting article studying the increasing amount of energy required to produce oil, https://jpt.spe.org/plummeting-energy-return-on-investment-of-oil-and-the-impact-on-global-energy-landscape ,
  8. The main problem with something like the P68 is that it won't be very resiliant to the "occassional" heavy arrival that may occur when you're first learning to land. The only twin I've ever used as a trainer is the venerable Multiplex Twin Star and they are pretty good in that roll. but I'd recommend you pop along to your local club before you purchase anything, they may even have a club trainer you can have a go on.
  9. Not by you 😉That's a floater too, the fixed gravity based ones were typically 200,000 tons of concrete, I think they had more than one wheelbarrow!
  10. You do realise that every gas/oil well is cemented in place, it was a faulty cement job that was the instigator of the Gulf of Mexico Deep Water Horizon "spill". I wonder how much concrete is in one of these
  11. Years ago when my son was learning to fly, he would get a bit despondent when his landing attempt damaged the IC trainer we had curtailing flying for the day. Bought a Wildthing and went off the local slope, once he realised it was very difficult to damage he gained confidence really quickly. I've still got the Wildthing some 20 years later, and let relative newbies fly it. The great thing about slope soaring is that it does teach you that elevator controls speed.
  12. Here's my trolley, you can even tow your model with it.
  13. I used a foldable festival trolley I got from Aldi, had it for 3 years, been brilliant. (My flight box is around 45 years old!) 4s Life powered starter Hand pump Standard glow stick Make sure you include a fuel filter in the pump discharge to filter the fuel as you fill the plane.
  14. Remember there's two types of RC heli's, those that have crashed and those that haven't crashed yet😗
  15. Just resurrecting an old plan built Stearman for an old Laser 150, I'll test fly it and if any good might look at adding a dummy radial.
  16. You've obviously not been reading the thread on smart phones 😉
  17. Probably similar to a lot, I do read it, but then again I'm usually the one explaining what our CAA restrictions/exemptions are so need to keep upto speed. I often say it was explained in the BMFA news, but then am advised that they never bothered to read it.
  18. Yes, but it runs from the date of issue, whereas BMFA and LMA are calendar year, so if you got your operator ID in April it only needs renewing in April and you get a notification from the CAA a couple of weeks before. If you got your operator ID via the BMFA/LMA you can check the CAA expiry on your membership online details.
  19. Not sure if the skill in restoring Teddy Bears is transferable to washing machines. I've done the element in our cooker a couple of times and done the hinges on the oven and fridge. My speciality though is bringing old RC models back into service 😁
  20. I've used a few different brands, most have been fine, I like the ZTW Beatles ESCs, work well and have been very reliable and reasonable cost. Several UK based suppliers too, eg Robotbirds, RC World. But I also have a couple of Overlander ESCs and they've been fine too.
  21. Robin, thanks for that. Only one venturi insert (fitted) with the one I have.
  22. Yep, did the element in our fan oven just before Xmas, found a youtube video and just followed that.
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