Seagull 61" Sparrowhawk to be Christmas Build

The Beard
Topic Author
Offline
Forum Master

09 Jan 2012 14:41 #91 by The Beard

Replied by The Beard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

you cannot move the wheels they are fitted to a plinth and have a support on them that prevents movement.The wheels are very big,the field is at its worst at present with worm mounds ,grass needs a cut ,and wet.so I think the tipping wont be a problem.I added 50 grams to the front but will need to mark the C of G.I thought it was ok ,but it was difficult to do at the field,so will be checking it again.It wasnt me that landed.Ill wait a couple of flights yet,but get everything right first.

Please Log in or Create an account to join the conversation.

The Beard
Topic Author
Offline
Forum Master

11 Jan 2012 06:14 - 11 Jan 2012 06:17 #92 by The Beard

Replied by The Beard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

I may have come up with the answer,the C of G is right,but Im using a 6 volt battery which is making the elevator move faster but not affecting the aileron or rudder because of the settings and think if I go back to 4,2 volt it may be OK as the servos work faster on 6 v.

Last edit: 11 Jan 2012 06:17 by The Beard. Reason: add

Please Log in or Create an account to join the conversation.

Klipkopwildlife
Offline
Administrator
I'm supposed to be retired!

11 Jan 2012 12:13 #93 by Klipkopwildlife

Replied by Klipkopwildlife on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

I don't think that's going to help Stephen, I doubt you'll notice the speed response difference in real time, I'd try 40% expo and see what happens. That should really soften it down in flight. You could also give the elevator dual rates with 50% travel and no Expo. So that once you're in the air and got some height you can switch over.
To recap, full rates = full travel + 40% Expo
Half rates = half travel + 0% Expo.

Do it now, you may never get another chance

Please Log in or Create an account to join the conversation.

The Beard
Topic Author
Offline
Forum Master

12 Jan 2012 01:12 #94 by The Beard

Replied by The Beard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

Youve made my head hurt,and yes your right about battery.Im going to readjust everything first and go from there.A friend of Ken Anderson has been in touch and given me some pointers and he has no probs with his and no need for expo

Please Log in or Create an account to join the conversation.

The Beard
Topic Author
Offline
Forum Master

11 May 2012 16:27 #95 by The Beard

Replied by The Beard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

Havent flown this one since.Im waiting for the weather to improve.It could be we needed extra elevator to take off because of the wet muddy grass.So I will try when its dry.

Please Log in or Create an account to join the conversation.

Phil Wood
Offline
Inactivated User

11 May 2012 16:34 #96 by Phil Wood

Replied by Phil Wood on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

The Beard wrote: I may have come up with the answer,the C of G is right,but Im using a 6 volt battery which is making the elevator move faster but not affecting the aileron or rudder because of the settings and think if I go back to 4,2 volt it may be OK as the servos work faster on 6 v.

That's not going to make the slightest bit of difference.
The servo's may move faster on a higher voltage but they are only tracking how you move the sticks.... unless you're Ali what'shisname you'll not notice any difference.

I just own the forum .... you guys make it great thanks.

Please Log in or Create an account to join the conversation.

The Beard
Topic Author
Offline
Forum Master

11 May 2012 16:39 #97 by The Beard

Replied by The Beard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

Thanks for the opinion Poly,Im sure your right.It could be my mate who flew it was exagerrating.Im planning to have another guy fly it before I do.

Please Log in or Create an account to join the conversation.

The Beard
Topic Author
Offline
Forum Master

24 May 2012 03:36 #98 by The Beard

Replied by The Beard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

Still considering the elevator and in need of advise.The elevator end horn is no adjutable,but there are arms on the servo ends,2 servos.What affect is made by moving the pushrods to the inside hole of the servo arm from the outside.Would it make the elevator movement more gentle.I can readjust throw on my transmitter to Seagulls recomendations,wondering if this would make them less responsive.

Please Log in or Create an account to join the conversation.

Garry Pollard
Visitor

24 May 2012 03:44 #99 by Garry Pollard

Replied by Garry Pollard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

If you move the pushrod towards the centre of the servo, the elevator movement would be less. Be careful with this howerver as you can get to a situation where you have not got enough elevator for good control. Depending on the TX you use and if it has the facility , use expo, which will soften the action of the stick. I had to do this with the Spit

Garry

Please Log in or Create an account to join the conversation.

Phil Wood
Offline
Inactivated User

24 May 2012 18:18 #100 by Phil Wood

Replied by Phil Wood on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

Also, If there is the tiniest bit of slack where the clevis fits into the servo arm, this will become more noticeable when on a shorter servo arm or shorter horn.
It will give you more elevator "Slop".

Pol.

I just own the forum .... you guys make it great thanks.

Please Log in or Create an account to join the conversation.

The Beard
Topic Author
Offline
Forum Master

25 May 2012 07:17 #101 by The Beard

Replied by The Beard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

There is no slack on my clevisises,some say there quite pert !!

Please Log in or Create an account to join the conversation.

The Beard
Topic Author
Offline
Forum Master

25 May 2012 07:18 #102 by The Beard

Replied by The Beard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

Im going to get my book out and look at expotential.

Please Log in or Create an account to join the conversation.

The Beard
Topic Author
Offline
Forum Master

26 May 2012 04:03 - 26 May 2012 04:38 #103 by The Beard

Replied by The Beard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

Gone to plan "C".I checked the elevator controls and settings.Ive re adjusted the sevo arms first to centralise them.Ive then made the elevator horns shorter by screwing them down the horn bolt ten turns.Ive moved the push rods in on the servo arms and readjusted the pushrods. Ive reduced the up elevator by 20 % . This should make the elevator more gentle hopefully.

Last edit: 26 May 2012 04:38 by Garry Pollard.

Please Log in or Create an account to join the conversation.

Garry Pollard
Visitor

26 May 2012 04:38 #104 by Garry Pollard

Replied by Garry Pollard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

That should help Stephen

Garry

Please Log in or Create an account to join the conversation.

The Beard
Topic Author
Offline
Forum Master

26 May 2012 20:23 #105 by The Beard

Replied by The Beard on topic Re: Seagull 61" Sparrowhawk to be Christmas Build

Ive been reading my thread on RCMand E and a couple of friends ther 1 being Ken Anderson are also telling me that the Seagull C of G at 75mm from the leading edge at the tip is wrong,they have said it should be 110mm,which will also have an effect on the elevator I believe. Im just going to check this out.

Please Log in or Create an account to join the conversation.

Time to create page: 0.253 seconds

Login Form

Seagull 61" Sparrowhawk to be Christmas Build