Gordon Tarling

I'm using a Q-X7S transmitter and a X4R receiver for a model boat. I'd like to get telemetry for the drive battery voltage (12V SLA) - any idea which sensor will work? Thanks! Edited By Gordon Tarling on 08/12/2018 13:16:08

Posted by leccyflyer on 08/12/2018 12:17:01: What's an SLS system? Self Launching Sailplane - i.e. it has a motor. I think the type the OP is looking for is a retractable type which folds away into the fuselage, normally just behind the cockpit. I haven't found a cheap one yet! Other options are available and I'd suggest the OP explores those through the dedicated gliding sites.

If you want to replace them, I suggest you remove the old ones and measure them. That's the only way to be 100% certain of the size. Also, don't just measure one like I did recently, bought the 'correct' bearings, only to find that the one I hadn't previously removed was a different size.

This one is the best of the lot, it's not cheap, but is very accurate.

Piers - the cow catchers to which you refer were water deflectors, nothing more, nothing less. BA did NOT have the runway inspected before every takeoff. Neither was there any tyre pressure indication or warning system fitted - tyre pressures were checked the hard way.

Whilst that Mentour video makes a lot of sense, it doesn't begin to explain just why increasing airspeed and decreasing pitch on the artificial horizon(s) were seemingly ignored. I think there's a lot more convolutions to unfold before we really know what happened.

This one, from ARCEurotrade, is much better value than that Clarke one. Though it looks very similar, ARC have incorporated several improvements of their own, which improve it greatly. ARC's service is top notch, too!

As John says, don't waste your money. Might be OK for turning small wooden or plastic items, but definitely not metals. Get yourself a proper mini lathe from a reputable UK supplier, such as this one.

Posted by Chris Walby on 18/10/2018 19:31:13: Perhaps people enjoy misinforming others. Depends who you consider is misinformed.

Foam-Tac is the adhesive to use for sticking almost anything to foam. Available from the usual online sellers, though it's not cheap.

Built in camera stabilisation is designed to deal with lower frequency vibrations, such as hand shaking. For the higher frequency vibrations in most models, you're usually better with it turned off and using mechanical means to cushion the camera from the vibration. Soft mounting can be successful, but sometimes a fair bit of 'tuning' can be required in order to get good results. I have two Mobius cameras and a Gitup F1 which are used exclusively for aerial photography. I am currently getting excellent results from my Mobius Mini that is rigidly mounted on my tricopter. There's often a lot of trial and error involved in order to get decent shots.

Digger - I would have gladly downloaded them and sent them to you on a DVD, but Ch 4 catchup will only let me watch them and not download them. Unless anyone else knows different?

Posted by Andy Meade on 11/09/2018 12:26:52: Are there any good rc boating forums, like these hallowed pages? It's always something I've wanted to get in to, and there's only so many times I can sit on top of a wet hill waiting for the wind to blow! **LINK**

The obvious answer is not to use their Global Shipping program - it's slow and painful. Better to use Royal Mail or one of the courier companies.

David, just sent you a PM regarding your motor. Gordon

I think I ought to point out that many car wheel stick-on balancing weights are made of steel these days, so if buying them, try to ensure they really are lead.

I'd suggest that you take a look at Ecalc - it's an online calculator which costs peanuts to subscribe to. It's well supported and has matured into a very useful tool over the years. The restricted trial version is free to use and that will give you a taste of what it can do. The motors database doesn't have data for the 4-max motors and some others, but a very close equivalent can usually be found. I use it frequently and find it useful as well as fairly accurate.

Reply sent.

David, If you'd care to send me the suspect motor, I'd be happy to check it out for you and repair it if I can. No charge, save the postage each way.

Some good replies here, but my suspicions lie with the motor connectors which were fitted by your clubmate. It is possible that the motor wires have been shortened and the insulation not fully removed before soldering the connectors. David - is it possible for you to post a close up photo of the motor connectors? To check with your multimeter, set it to the ohms range, short the two meter probes together and ensure that gives a zero reading. Then, with the motor fully disconnected check the resistance between the pairs of wires. All three readings should be roughly equal. Report back here with your findings. Edited By Gordon Tarling on 29/08/2018 10:35:10

Can't help with Manchester, but Slough R/C and West London Models are very close to Heathrow airport.

Not much wrong with Nigel's recommendations above, except that I'd recommend a 3S 2200mAh lipo and maybe change prop or motor accordingly. A 40 Amp ESC should be plenty. Reminds me that I really should dig out my 'mothballed' STOL and get it flying again. It last flew on a geared Astro 05 motor and an 8 cell Nicad pack!

As the others have said, the shaft is retained in the rotating bell by the grub screws, so you don't need to undo them. Once you've removed the circlip, then the bell should just pull off the stator.

Cuban8 - the OP's post stated that it was a faulty receiver, not a transmitter.

John - so glad that you enjoyed the Tiger Moth experience. It's a wonderful aircraft! I've had the pleasure of being allowed to fly one on two occasions, once from White Waltham in a Moth owned by a group and once on a sightseeing flight from Wanaka in NZ, which was just the most wonderful experience.