RE: World Models .60 size P-51 Mustang--Petie 2nd version  
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RE: World Models .60 size P-51 Mustang... - 1/31/2008 6:11:29 AM   
hummingbird111



Posts: 338
Joined: 2/27/2005
From: Nashville, TN, USA
Status: offline
quote:

ORIGINAL: dremelboy

if you look back on this thread youll notice one guy has used two servos for the retracts someething i may do as my bird is a bit heaver

dremelboy,, that's what i am planning on doing to mine,, my hs 75 bb retract servo sticks sometimes too,,

(in reply to dremelboy)
       Post #: 926

RE: World Models .60 size P-51 Mustang... - 2/2/2008 2:20:45 PM   
dremelboy


 

Posts: 20
Joined: 6/12/2006
From: chelmsford, UNITED KINGDOM
Status: offline 		hi there hummingbird i think thats wise becayse if you dont what will happen could be fatal to your bird people may think wy let me tell you if the retract servo keeps stalling then its not getting to its start stop points witch in turn meens the battrey is still sending power to the servo witch can the run it down leading to no power to the rest of your servoes then you wont have to worry about the retracts because youll have no bird to worrie about or even worse one of your buddies at the field may cop it not good so im going to follow suite

(in reply to hummingbird111)
       Post #: 927

RE: World Models .60 size P-51 Mustang... - 2/2/2008 2:48:06 PM   
tenacious101010


 

Posts: 284
Joined: 9/20/2004
From: Tampa, FL, USA
Status: offline 		dremel is right on the money on this, you want the mechanical linkages as close to perfectly adjusted as possible. Use your mechanical adjustments first then you can use the end points of your transmitter for ultra fine adjustments. If you are hearing a servo growling/buzzing/humming, whatever one might call it, you are hearing it suck the life from your battery at a very fast rate. The opportunity for your plane to fly uncontrolled just gets that much closer. Good Luck!

(in reply to dremelboy)
       Post #: 928

RE: World Models .60 size P-51 Mustan... - 2/5/2008 2:06:10 AM   
Billville


 

Posts: 100
Joined: 12/26/2006
From: burbank, CA, USA
Status: offline 		Amen, Brother.

Someone suggested using a separate battery for the retracts. Anyone heard of that before, and what do you think?

(in reply to tenacious101010)
       Post #: 929

RE: World Models .60 size P-51 Mustan... - 2/9/2008 2:10:13 AM   
rare_bear



Posts: 1164
Joined: 3/20/2003
From: north of the basin, CA, USA
Status: offline 		wot?
a seperate power supply for the retracts?
2 servos for the retracts?

sounds like a band-aid approach to me.
best to get the gear working properly in the first place, but that's just my opinion.

(in reply to Billville)
       Post #: 930

RE: World Models .60 size P-51 Mustan... - 2/9/2008 5:42:23 AM   
pc55bomber


 

Posts: 165
Joined: 8/23/2005
From: Newcastle, AUSTRALIA
Status: offline 		I used 2 retract servo's (2 x GWS136) because I added Robart oleos and scale wheels to the original retracts, which was too much for 1 servo to handle.

I agree with Rarebear, if your retracts are not working properly on 1 servo, you have a problem, find the problem and fix it.
Mine worked fine without any incidents with 1 servo.
Adding another battery to power the retracts is a complete waste of time and does not solve the problem.

Check that the Z bend connector, at the retract end, is not snagging on the framework you can turn the plastic fitting or file the wood to make it work smooth.

Or remove the retract and check that the unit works smoothly on the bench, its much easier finding the problem that way.

Hope this helps.

Cheers
Paul

(in reply to rare_bear)
       Post #: 931

RE: World Models .60 size P-51 Mustan... - 2/11/2008 5:06:06 PM   
dremelboy


 

Posts: 20
Joined: 6/12/2006
From: chelmsford, UNITED KINGDOM
Status: offline 		hi there bomber i here what your saying its not a case of get them working propley first i have gear doors on mine witch causes drag and struggels to go up pluss my plane now ways about 11lbs due to the referb

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(in reply to pc55bomber)
       Post #: 932

RE: World Models .60 size P-51 Mustan... - 2/12/2008 7:41:30 AM   
pc55bomber


 

Posts: 165
Joined: 8/23/2005
From: Newcastle, AUSTRALIA
Status: offline 		Roger that Dremelboy, in that case add the extra servo to handle the extra load.
This is an easy refit if you position the additional servo in exactly the same location on the other wing, as the cutouts are already in the ribs to accept the servo rails. Check my post 891 for pics.
I still only use 1 battery pack so a 2nd pack is not required unless you need extra peace of mind.
Hope this helps
Paul


< Message edited by pc55bomber -- 2/12/2008 7:51:54 AM >

(in reply to dremelboy)
       Post #: 933

RE: World Models .60 size P-51 Mustan... - 2/12/2008 11:31:37 PM   
kenbill


 

Posts: 56
Joined: 4/3/2005
From: , TX, US MINOR OUTLYING ISLANDS
Status: offline 		has anyone out there replaced the retract wire with robart struts. if so which ones. did you have to do any modifications

(in reply to pc55bomber)
       Post #: 934

RE: World Models .60 size P-51 Mustan... - 2/14/2008 2:04:41 AM   
Billville


 

Posts: 100
Joined: 12/26/2006
From: burbank, CA, USA
Status: offline
quote:

ORIGINAL: rare_bear

wot?
a seperate power supply for the retracts?
2 servos for the retracts?

sounds like a band-aid approach to me.
best to get the gear working properly in the first place, but that's just my opinion.


I agree, RB -

I think that dedicated retract batt was someone's workaround to solve the DX7 brownout issues. The DX7 receiver takes two seconds to reset, and some guys focused on the retracts and servo as the potential cause for a high load condition.

But I don't think that is a solution for gear related problems.

Still flyin' the Bearcat, RB? Bill

(in reply to rare_bear)
       Post #: 935

RE: World Models .60 size P-51 Mustan... - 2/14/2008 12:02:31 PM   
dremelboy


 

Posts: 20
Joined: 6/12/2006
From: chelmsford, UNITED KINGDOM
Status: offline 		hi there bomber nice job i think i referd to your post when someone else asked me about the retracts im going to do the same does any one know were i can get images on the net of an colling air exit flap for the p51 i want to make an air operated one for my zeroli mustang and also the other little flap witch is in front of it

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(in reply to pc55bomber)
       Post #: 936

RE: World Models .60 size P-51 Mustan... - 2/16/2008 8:21:26 AM   
pc55bomber


 

Posts: 165
Joined: 8/23/2005
From: Newcastle, AUSTRALIA
Status: offline 		Hi Kenbill
see my post 895 for the details.

Have to modify the retract body so the strut will close ( I just used my dremel) you will notice a small piece of brass plate in the retract which was glued with CA to remove the slop.
Remove the wheel well lining (where the strut sits) as per the pics and relace with some balsa to finish off.

I used the original wire leg as per the Robart instructions. works great.

Hope this helps
Cheers
Paul

< Message edited by pc55bomber -- 2/16/2008 8:25:08 AM >

(in reply to kenbill)
       Post #: 937

RE: World Models .60 size P-51 Mustan... - 2/16/2008 6:19:40 PM   
kenbill


 

Posts: 56
Joined: 4/3/2005
From: , TX, US MINOR OUTLYING ISLANDS
Status: offline 		Paul
Thanks for the info. There were no pictures on post 895

(in reply to pc55bomber)
       Post #: 938

RE: World Models .60 size P-51 Mustan... - 2/17/2008 5:49:23 AM   
pc55bomber


 

Posts: 165
Joined: 8/23/2005
From: Newcastle, AUSTRALIA
Status: offline 		The pics are in post 891.

(in reply to kenbill)
       Post #: 939

RE: World Models .60 size P-51 Mustan... - 2/17/2008 11:01:19 PM   
Q8Nitro



Posts: 26
Joined: 9/17/2007
From: kuwait, KUWAIT
Status: offline 		Hi guys,
This is Ali from Kuwait again, happy to announce that i finished building my P-51 2 days ago and the maiden flight will be this weekend hopefully if the weather is ok, it's powered by an OS FS 120. i have a small question