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Member postings for Kevin Wilson

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

Thread: Reading the wrong frequency...??
15/05/2018 19:35:16

I would expect NFM to give a more accurate reading.

The passband on AM will be rather wide. I can only surmise it is the pulse train on the modulation that is tricking your scanner into 'auto' setting as AM.

I cannot recall anyone manufacturing a 35mHz AM transmitter, I have only seen 35 FM since the early 80s.

Thread: Dead Lipo remedy?
13/05/2018 10:27:12

I have tried revivjng about half dozen mainly <1000mAh li-po using 0.5C constant current charge (ni-cd) over many years

Some worked, some didn't.

None have burst into flames.

I have no qualifications to say anything more.

Thread: PU Glue removal
08/05/2018 14:08:29

Gorilla recommend soap, hand cream (moisturiser) and time.

They specifically say not to use strong chemicals such as acetone or thinners, but that is probably safety driven advice.

I have had limited success with acetone if it hasn't set, but mainly as TWS says, time

Thread: Off to RCHotel
29/04/2018 23:07:28

I had my check flight on an ST Discovery last year.

Quite a nice high wing foamie. I had a fair few flights with it by choice during week.

Sun hat, shades and favourite neck strap is all you need. Perhaps trunks for the afternoon

Edited By Kevin Wilson on 29/04/2018 23:08:28

Thread: 12v charger adaptor supply
29/04/2018 08:52:02

Refering to the original question.

If you are referring to the coaxial dc input socket such as commonly used for transmitter charging connectors.

These are specified by outer then inner dimmensions. The outer is commonly 5.5mm but the inner varies, 2.1mm and 2.5mm are the ones I see mostly. These would be specified 5.5x2.1 or 5.5x2.5 respectively.

Measuring the plug is easy, using a caliper on the outside diameter and a drill bit as a plug gauge on the bore.

The sockets I usually measure by trying first a 5.5x2.1 plug then a 5.5x2.5 plug.

As has been mentioned, we are pushing these connectors hard so the correct size is essential. You can get away trickle charging a tx with the wrong connector, they will often make sufficient contact, but a recipe for disaster when drawing higher current.

Thread: Hello once again - third time lucky
01/04/2018 22:51:17

I flew an ST Discovery at RC Hotel last year and that was a nice foam plane.

It is the standard trainer at rchotel. It seemed quite popular and there were plenty of fancier planes free to take off the rack.

I also liked the FMS SuperEZ if you prefer a foam tail dragger.

See what they have at the club, plenty of time to spend your money.

Good luck

Thread: Spektrum iX12
29/01/2018 14:09:54

I cannot think of a transmitter that I would be less likely to buy.

If this comes ready infected with Google and its constant updates and invasive spyware, I wouldn't touch it with a bargepole

But thats just me. I am sure a lot of people will go mad for it.

Thread: Totally drained NiMh pack - can it be resuscitated, and how?
04/10/2017 11:46:36

As some previous posts seem to be based on modern lithium cell rules I will share my experience with LiPo as distinct from my use of Nickel technologies.

I have not been so lucky with lithium cells taken to zero. 50% will not recover. and those that do show reduced capacity and I have little confidence in them. Those do go in the bin.

It seems the less time a Lithium cell is at zero volts the better it can be recovered. One I had at zero volts for a few days recovered completely, One at Zero for a few months lost one cell completely and the other cells had <20% capacity. So quite similar to Martins example above.

My experience runs counter to the common view that a Lithium cell taken below 3 volts is a gonner.

As context I only use max 3S 2300mAh and in less demanding applications. All my cells are budget (turnigy, zippy etc) sourced from various internet sources. I always balance charge and always at 1C charge rate.

Edited By Kevin Wilson on 04/10/2017 11:50:44

04/10/2017 11:21:59

It was always considered good practice to completely discharge nickel based batteries to zero.
I have frequently taken nimh and nicd to zero without harm.
I would recharge this pack at 1/10C but only because Eneloops are not quite as robust to high currents.
I would not expect any charger to grumble about low voltage on a nickel setting as nicd/nimh do not have low voltage issues encountered with lithium batteries.
If in doubt, do a few cycles and check the capacity.
When I was rc car racing I regularly cycled my race packs 5C discharge 3C charge as a conditioning routine. It would restore their capacity.

Edited By Kevin Wilson on 04/10/2017 11:32:29

Thread: New canopy?
25/09/2017 22:24:55

Pop bottle method works really well.

I used mdf for the plug and a few coats of varnish. 

I used to do rc cars and the trick for painting the inside is to use a green nylon scouring pad to lightly scuff the inside of the clear plastic to give the paint a key.

I found a worn one worked well and the fine scratches disapear in the paint. It's the smooth outer surface that gives the gloss shine. 

Thread: Amateur Radio operators?
18/09/2017 21:20:48

G6LTK here.

I have a weekly sched on 2m rag chewing, but thats about it.

Thread: push rods threaded each end
15/08/2017 22:39:09
Posted by David Mellor on 15/08/2017 10:20:33:

I've been using z-bend with 1.6mm die wire (the maximum diameter my z-bend pliers can cope with according to the manufacturer) 

The problem is that the wire rods flexed to much.

In this situation I solder thinner wire Z bends to the end of thicker wire push rods. Or glue them to carbon rods.

But then most of my builds are on the smaller side.

Thread: Cambria Funfighters
05/07/2017 23:08:51

It may be worth mentioning the website  **LINK** as that is not the most prominent return on Google

Edited By Kevin Wilson on 05/07/2017 23:10:36

Edited By Kevin Wilson on 05/07/2017 23:11:12

Thread: Phoenix 2000
19/06/2017 22:53:22

I use 3S 1350 Zippy compact batteries pushed right to the back stop of the tray.

I have 10g weight right at the back of the fuselage to get stock C of G.

My first Phoenix I used 3S 2200 on the stock tray, so the fuselage must have been a bit heavier.

My brother akways runs 3S 2200 batteries in his P2k but I don't see any advantage.

18/06/2017 08:48:54

If I remember correctly I paid £9. Just checked on hobby king.

Showing UK stock and I went up to putting my money in.

£82.11 + £5.65 shipping. I do get a discount but not on the P&P

17/06/2017 22:46:44

Got mine from the EU warehouse no problem.

Thread: Depron Aerobatic Model
02/06/2017 11:46:27

Tony, you may also find the lack of comment may be due to your use of Depron.

It is certainly a material that I do not use and can therefore make no useful comment on.

I do however watch with interest and awe at the fine craft that you fashion from foam.

It must feel a lonely place being so far in front of the mainstream.

Thread: DX7S repair issue - swapped pot leads
11/05/2017 20:43:34

Identify the wires that go to the outside conections of the pot and swap them.

Either at the pcb connection or on the pot. Whichever you are most comfortable with.

Thread: Micron Radio Control
11/05/2017 20:38:58

Only used them a couple of times.

Excellent service

Thread: DX6i Programming Rudder to Aileron?
05/05/2017 11:14:01

Glad it worked.

I ca never remember if the first one is the stick or the channel.

I find my Taranis so much more logical because it is all inputs and outputs.

Sometimes simpler isn't easier ☺

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