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Member postings for Gordon Tarling

Here is a list of all the postings Gordon Tarling has made in our forums. Click on a thread name to jump to the thread.

Thread: Propguy?
01/03/2019 09:38:15

In this day and age of easy and instant communications, there can be no excuse for not replying to anyone within a reasonable period of time. I tried to contact Propguy some time ago with a query about a L/H prop and never had a reply, so I went elsewhere in the end.

Thread: Field mower question
15/02/2019 11:35:46

Many garden/agricultural machinery specialists will have a range of used machines for sale and will guarantee them. The same specialists are also usually capable of doing repairs, so worth asking at least a couple for a quote to repair your existing machine.

Thread: Mini/micro lathe
14/02/2019 09:21:27

There's a lot of info on this website - LINK Unfortunately, it would seem that he now has started charging for access to some of it.

Thread: Catastrophe!
02/02/2019 18:01:14
Posted by Nigel R on 01/02/2019 12:21:56:

" It's been well proven that Eneloop cells have a high internal resistance"

From memory, manufacturer data on internal resistance suggests they do not. Do you have a link to any testing done on Eneloops that disproves the manufacture information?

The original nimh cells were quite high internal resistance but the newer low discharge cells are much improved.

Nigel - there's some discussion on the subject here - link I have to admit that I've not done any testing, what I say is just based on personal experience.

JonathanM - A123 cells are my preferred choice when a model requires a receiver pack, the 2300/2500mAh cells can easily supply 60 Amps, though they might be a bit large for many models, but you only require two for a receiver pack. There are also 1100mAh (I think) cells which are obviously smaller. There are many 18650 sized cells on the market, which are suitable, too, but you need to ensure you use the big name types with lower capacity, i.e. Panasonic, Sanyo etc.

Edited By Gordon Tarling on 02/02/2019 18:28:08

01/02/2019 12:14:31

Jonathan - Do yourself a big favour and replace any 4 cell Eneloop Rx pack with a 5 cell one. It's been well proven that Eneloop cells have a high internal resistance and are unable to deliver the required current without a large voltage sag. Using 5 cells helps to get around the problem, though I'd prefer to use other types of cell myself.

Thread: Saws..A Cutting Question.
01/02/2019 11:58:30

Bandsaw, beyond any doubt. I have a scroll saw and its only real use is cutting out the centres of formers etc. The bandsaw can do so much more and I wouldn't want to be without one. Get the best one you can.  I should mention that I've tried strippers that use a knife type of blade and always found the blade has a tendency to follow the grain, giving a wavy cut.

Edited By Gordon Tarling on 01/02/2019 12:00:29

Thread: Can a drone fly at 10000ft?
17/12/2018 17:05:50
Posted by Don Fry on 17/12/2018 15:36:09:

Cheers Steve, sounds better. I take your point, up front of one of those things. Birds you can't do much about, plastic bags are of no interest. And then you get the possibility of a drone gets on the agenda. Will make you wish that possibility would go away. And you see some things wrongly. Reckon I would.

Plastic bags ARE of interest Don. Ingested into an engine, they melt and can block vital cooling holes in turbine blades etc.

Thread: Voltage sensor
10/12/2018 17:54:33

Chris, the FBVS sensors are readily found on 'the bay'.

Bob - will bear in mind that a small pot will work just as well. I'm guessing a 10k pot would be OK?

09/12/2018 17:07:25

Thanks chaps, got it all working properly this afternoon, using the FBVS sensor. Not sure what I was doing wrong previously though. I think I've calibrated it correctly, as it's showing the correct voltage on the Tx screen, so now I have to set up a low voltage alarm for it.

One thing puzzling me is that I keep getting 'telemetry lost' warnings during the setting up process - is this just because the Tx is very close to the Rx?

BobCotsford - thanks for that info, handy to know.

08/12/2018 18:08:42

Carperfect - I don't really want to be re-flashing the Tx if it can be avoided.

Andy48 - I'm fairly sure that I had the FBVS connected as shown in that documentation. However, I'll re-check the connections tomorrow and do some voltage/continuity checks if I can't get it working. BTW - very useful link to that documentation, I've not seen that before - thanks.

08/12/2018 16:07:30

Thanks for the advice chaps. I bought an FBVS-01 a couple of weeks ago and connected it up as shown in the documentation, but the Tx doesn't find it as a telemetry sensor. I did read that it will only work with the D8 receivers, which aren't compatible with my Tx, though that doesn't seem to be entirely true.

I'm wondering if the FCS-40A current sensor also gives battery voltage - does anyone know?

Bob - the resistor divider sounds feasible to me - will investigate that method.

Yes, SLA means Sealed Lead Acid battery - not much use in aircraft, but frequently used in boats.

I'll have another crack at the FBVS sensor tomorrow.

08/12/2018 12:55:23

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

Thread: Retractable SLS Systems
08/12/2018 12:43:10
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.

Thread: turnigy G46 bearings
28/11/2018 10:27:13

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.

Thread: Looking for a IR lipo meter up to 6S
22/11/2018 18:12:59

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

Thread: Lion Air Crash
21/11/2018 13:01:04

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.

20/11/2018 11:48:32

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.

Thread: Bench top milling machine
16/11/2018 14:32:41

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!

Thread: mini lathes
12/11/2018 13:03:19

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.

Thread: Wiring a Twin
19/10/2018 10:21:20
Posted by Chris Walby on 18/10/2018 19:31:13:

Perhaps people enjoy misinforming others.

Depends who you consider is misinformed.

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