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Member postings for Martyn Johnston

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

Thread: RC Flight Simulators
14/05/2007 13:24:00
But what does the Phoenix do that the 'FREE' MFS doesn't?
I guess it 'looks' a lot prettier, but that doesn't bother me much.
Will I actually learn any more from the Phoenix, or is it just aesthetics?
11/05/2007 15:58:00
I just bought myself a USB connector, from MFTech. It connects my own t/x to my PC. I've just got it working with the 'free' FMS simulator software - very easy.
Not used it much yet but it seems to work perfectly.
Thread: Battery Charger
19/04/2007 17:03:00
So the 12 V charger runs off the 12 V 7Ah gell cell I've just bought for my tool-box; is that right? Or does it need connecting to my (bigger) car battery?
I'd have thought a 12V/240v one made more sense, to charge up the night before flying!
19/04/2007 15:11:00
Alistair,
Me again!
If I use my existing (7.2 V) charger on my new NiMh (8.4 V) battery will it only charge it up to 7.2V? Will that matter? presumably it would only run the motor I've got at the same power the current (7.2 V) NiCad battery does. Maybe that's a good thing. Maybe 8.4 V would be too much for the motor?
Martyn
19/04/2007 15:08:00
Alistair,

Wow, a whole lesson in batteries; I've just learned a load more about batteries than any magazine articles have told me.
Thank you.

If I were to buy a charger to deal with my existing Tx battery, Rx battery, old NiCad battery and new NiMh battery, will a single charger cope?, and would you have a recommendation?

Martyn
19/04/2007 13:55:00
I'm getting confused on batteries.
I now have a battery in my Tx (unknown V(7.2V?)), a 4.8V for my Rx & servos, an old 7.6V NiCad, and a new 8.4V NiMh.
Will one charger cope with all this?
19/04/2007 13:52:00
Hi all,
I have an old 7.6V, 1000mAh, Ni-Cad battery that came with its own little plug-in charger.
I've just bought a new 8.4V, 3000mAh NiMh battery.
It didn't occur to me that it might need a different charger (only a Noobie, sorry).

So, three questions.
1. Can I use my existing charger? I guess that'll only charge it to 7.6V? But will it do any harm?
2. Am I supposed to get any specific type of charger (if I buy none) because it's a NiMh battery?
3.Any recommendations on which charger to get (ie 240V or 12 V?)?

Martyn
Thread: ic Engine Type
10/04/2007 09:32:00
Good, friendly advice.
Thanks all.
Just been given a cheap, 2nd hand, OS 46.
From what you've been saying it sounds like a good first engine.
I'll save my money until I know what I'm doing.
Martyn
Thread: RC Flight Simulators
04/04/2007 14:01:00
Can someone clarify something for me.
Why do these sims need to come with a cable?
Isn't the point of r/c modeling that it's 'Radio Controlled' !
Why don't they just have a radio receiver that plugs in to a USB port.

Maybe I've just invented something ! :-)

Martyn
04/04/2007 13:58:00
Some sims come supplied with a (cheap looking) t/x.
As a newbie I think I'd prefer one that uses my own t/x so that I get used to using it.
It ought to be cheaper with less stuff supplied, just software and a cable!

Martyn
Thread: ic Engine Type
04/04/2007 13:53:00
Another newbie here.
Thinking of buying my first powered plane.
The kit recommends an Evolution Power Trainer 2 stroke engine.
Am I right in thinking that the 2 strokes are the loud whining screaming engines? Do the 4 stroke engines sound more like proper engines.
Martyn
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