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Saturday 7/7/18

Sat Jul 07, 2018 9:07 pm by Gary M Jones

I was at the field today between 14:00 & 15:00 all on my own , good flying too. There is a dead sheep along the fence line towards the gate from the pits, I saw the farmer so reported this to her. I hope no one had plans for a BBQ Smile .

Farmer …

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servo

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Re: servo

Post by Stubbsy on Thu Jun 09, 2011 11:40 am

Mr Moff wrote:
What size lipo you got in there flower? flower

Danny.

2S 7.4v 2200mah

Andy Fisher wrote:Stubbsy did I see a Align on your heli what tail servo are you using

Andy

Yeah, running a 2 in 1 on mine and an Align DS650 tail servo.
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Re: servo

Post by Stubbsy on Thu Jun 09, 2011 11:56 am

BTW - all of my lipos which have red JST type connectors have male connectors on the battery not female! Suspect
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Re: servo

Post by Mr Moff on Thu Jun 09, 2011 12:35 pm

Stubbsy wrote:BTW - all of my lipos which have red JST type connectors have male connectors on the battery not female! Suspect

Quite correct banana man.

Danny.
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Re: servo

Post by Rich on Thu Jun 09, 2011 12:53 pm

Like this, as Dan said you're dead right but the pins are female just like the deans plugs


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Re: servo

Post by Mr Moff on Thu Jun 09, 2011 1:07 pm

Rich wrote:Like this, as Dan said you're dead right but the pins are female just like the deans plugs


Quite correct Rich Very Happy
I've never really used the jst's.Every time I see something with them I think "OMG" and chop em off.

Danny.
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Re: servo

Post by Stubbsy on Thu Jun 09, 2011 1:10 pm

Bingo! of course thinking about it - Male plug, female pins!
Hell - Im a Biology teacher and I still get confused at what bits go in where! - god help the future generation!
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Re: servo

Post by Rich on Thu Jun 09, 2011 1:13 pm

Not wanting to steal the thread but I use them on my small electric plane (RC factory Flash) never had any bother, no good for high current draw though

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Re: servo

Post by Mr Moff on Thu Jun 09, 2011 1:37 pm

Brians right about the c of g.You don't need to worry about it when you're at the beginner stage,as you can just trim it out.
You only begin to notice when it's off once you go into fast forward flight and start aerobatics.
I remember when Dave sergeant first took me up with my first 600 I was using that puny 1900 lipo,and he said not to worry as I wouldn't notice just hovering.

I'm not sure I'd try that servo on the tail though,to be honest I'd wait till you can get a tail servo for it.It's not too bad using cheap servos on a plane or on the cyclic but I've seen too many heli's crash because of a cheap tail servo that sends the tail out of control.It's horrible to see a nice model go down for the sake of a servo.

Danny.
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Re: servo

Post by Brian Colclough on Thu Jun 09, 2011 2:00 pm

I know you need a relatively good servo on the tail Danny, I never advocated otherwise but a beginner does not need some high end servo and H/H giro setup after all they're not allowed for the "A test

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Re: servo

Post by Mr Moff on Thu Jun 09, 2011 2:14 pm

That was meant for Andy about the servo Brian.
Heading hold is now the norm for tests and everything.
The current gyro's now don't even list anything other than heading hold,my GY520 for example doesn't do rate mode.
I'm not talking high end with the servo,but Align,Hitec and Futaba all do reasonably priced tail servos.
What isn't allowed for the a test is things like the heli command that pretty much hover for you.

Danny.
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Re: servo

Post by Brian Colclough on Thu Jun 09, 2011 2:39 pm

I don't know whether there's a 2011 yearbook or if there's been an addendum to the 2010 issue which is the latest I have at this moment but my copy reads "No artificial stabilisation of the helicopter is allowed other than a tail rotor giro." As far as I'm aware this has always meant no heading hold. If I'm wrong I stand to be corrected, perhaps one of our esteemed examiners can shed some light on this Wink
Standard piezo none H/H are still available, can be found on several sites

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Re: servo

Post by Mr Moff on Thu Jun 09, 2011 2:52 pm

Here you go Bri,just a little eye candy for you,
http://www.fast-lad.co.uk/store/index.php?cPath=27_31

That's most of the current gyro's available.I'm not sure if you've tried any heading hold stuff but I think you'd like it.
When I'm at the field next you're more than welcome to fly one of mine.

I honestly was agreeing with you about the servo.It's just that Andy already had a top of the range Futaba servo on there that died.You can get real good servo's for between the £30 to £40 Mark.I don't choose tail servos based on 3d performance because I can't do 3d.But I always go for the minimum spec's that each gyro recommends so the gyro can do it's job.I promise I wasn't having a pop at you.

Danny.
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Re: servo

Post by Mr Moff on Thu Jun 09, 2011 2:56 pm

No artificial stabilisation of the helicopter is allowed other than a tail rotor giro

Honest Bri,it says the same in mine,and says no artificial stabilisation of the helicopter "this is cyclic stabilisation like the robbe helicomand".
The last bit where it says "other than the tail rotor gyro" means other than.

I did my test with a heading hold gyro.I promise hh is fine.

Danny.
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Re: servo

Post by Brian Colclough on Thu Jun 09, 2011 3:03 pm

I have to apologise Danny I've just been doing some research on the BMFA website and found this paragraph :-
Gyros and Electronic Stabilisation
Where a fly bar is fitted, it is acceptable to use an electro-mechanical or solid state gyro in a
helicopter being used to take the test although electronic stabilisation is restricted to a single
sensor acting in rotation around the yaw axis only. This allows a range of gyros to be fitted,
from simple yaw dampers to solid state heading lock units but only acting on the tail rotor

So there you have it humble pie for supper for me Wink

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Re: servo

Post by Mr Moff on Thu Jun 09, 2011 3:10 pm

No apology necessary Brian.It's all good mate.

Danny.
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Re: servo

Post by Rich on Thu Jun 09, 2011 3:59 pm

Just spoke to the controller of the BMFA achievement scheme.

You can have heading hold activated for the "A" test.

Advantages.
Helps with the hovering assessment manoeuvres, maintains the tail where the pilot left it.

Disadvantages
Doesn't help with flying assessment manoeuvres (i.e. the lazy 8 manoeuvres), maintains the tail where the pilot left it, this way the pilot has to physically move the tail round at the ends of the lazy 8 & cross over points. As the guidance notes say "no side ways movement" in the flying manoeuvres.

This point is to be watched by the examiner.

Don't let this worry you though it should be straightforward test.

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Re: servo

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