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-   -   P-47 Thunderbolt Brotherhood (All P-47s Welcome) (https://www.rcuniverse.com/forum/rc-warbirds-warplanes-200/11591827-p-47-thunderbolt-brotherhood-all-p-47s-welcome.html)

sparky4lawndart 01-20-2014 03:02 PM


Originally Posted by Spiritwind (Post 11714852)
I have a YA P47. I put Hitec 645MG on the flaps. The flaps move with great ease but my servos are constantly buzzing when holding the flaps up or down.
i have tried all kinds of combinations with the throws but they still keep buzzing.
Should I use a larger servo or what??
All advice welcome... Thanks

I had the same problem and after much trial and error found (after bugging the guys at Hitec) that the servos are analog and they are fighting to achieve the position the signal wire from your receiver is telling it where to be... Most receivers have a more detailed or hi-definition signal to get servos at a precise point... sometimes analog servos just can't hit that spot so they buzz.

I found that a buzzing servo is also eating more amperage than a servo at rest or one that has hit that arc instructed. I got rid of the buzz by switching to a higher grade receivers and better digital servos.

I know that many will say that they've been using 645's since dirt was clean and haven't had any issues but I can tell you there is a point a buzzing servo will chew through 500MaH on a 15minute flight. IMHO...

stevegauth30 01-20-2014 03:45 PM

Hmm, the mystery buzz. Some of mine buzz once in a while for no apparent reason. Like I said, and this is only my experience, my digitalis buzz and twitch ALOT more than the analogs. I think it's safe to say, even in the case of ARFS, no two planes are exactly alike. If you know they're not binding, and your geometry is correct, and your end points are set, and it still buzzes a bit, probably not too much to worry about. Just my two cents for what it's worth. Good luck getting to the bottom of it. Steve.

SWORDSN 01-21-2014 11:58 AM


Originally Posted by stevegauth30@comcast.net (Post 11715772)
Hmm, the mystery buzz. Some of mine buzz once in a while for no apparent reason. Like I said, and this is only my experience, my digitalis buzz and twitch ALOT more than the analogs. I think it's safe to say, even in the case of ARFS, no two planes are exactly alike. If you know they're not binding, and your geometry is correct, and your end points are set, and it still buzzes a bit, probably not too much to worry about. Just my two cents for what it's worth. Good luck getting to the bottom of it. Steve.

Makes sense that they use more juice,buy my experience is no problem after several hundred flights.

pedro w rdz 01-21-2014 05:27 PM

These last wekend i was on a dive with my h9 p 47 60 with dle 20 prop 16x8 k series

And as expected i lost one of the elevators the flutter was horrible

had to order a tail set from e bay


Guess i have to step back on power

Jeje

Well they fly awesome on 1 elevator half.

Those dle 20 are monsters

Addictive engines

On the best warbird ever built



Pedro W Rdz

stevegauth30 01-21-2014 06:48 PM

I hear of a lot of people having flutter issues. I guess I've just been lucky so far. Never had it on any of my warbirds. I hope I didn't just jinx myself.

pedro w rdz 01-21-2014 08:10 PM

What engine do you have steve?

Lifer 01-22-2014 02:46 AM

I would recommend 6 inches of pitch. 8 inches is carrying the airframe too fast, obviously.

stevegauth30 01-22-2014 03:01 AM

dle 20's on all 60 size birds except one has an OS 120. the GS has a dle 55.

rc34074 01-24-2014 06:09 AM


Originally Posted by pedro w rdz (Post 11716757)
These last wekend i was on a dive with my h9 p 47 60 with dle 20 prop 16x8 k series

And as expected i lost one of the elevators the flutter was horrible

had to order a tail set from e bay


Guess i have to step back on power

Jeje

Well they fly awesome on 1 elevator half.

Those dle 20 are monsters

Addictive engines

On the best warbird ever built



Pedro W Rdz

Be careful with the DLE20 - it wont do well if it revs too high - they will come apart if they get to 10,000 rpm too much, from the posts I have seen here.

Also - take a hard look at the elevator hinges and pushrod system, and the servo for that matter. If there is much flex or looseness this will contribute to flutter.

Ed

raptureboy 01-24-2014 07:08 AM

Good article here by Minnflyer on flutter http://www.rcuniverse.com/magazine/a...rticle_id=1289

TonyBuilder 01-24-2014 09:14 AM

8 Attachment(s)
My re-build is coming along, almost one month into it.

TB

stevegauth30 01-24-2014 02:40 PM

Lookin good tony.

HoundDog 01-24-2014 03:31 PM


Originally Posted by TonyBuilder (Post 11719169)
My re-build is coming along, almost one month into it.

TB

Obvisly the pic's are out of order but after the Carbon fiber matte and the sheeting U will cut the gear door opening. My question is will you use the cut out material as the gear doors or fabricate the doors? Also by what method will they be opened and closed. Thanks

Spiritwind 01-25-2014 05:35 AM

Lifer, there is no binding at all thru the full range of the flap. I tried setting end points but it doesn't make any difference where they are set. Going to try a different servo.. Thanks

Lifer 01-26-2014 04:52 AM

Best of luck to you.

YAT-28E 01-26-2014 06:37 PM

1 Attachment(s)
Well, I will post my 1998 Gold Edition build still flying well. TT 61 and electric retracts, spring struts, Futaba for steering. I may finally put in a pilot....

http://www.rcuniverse.com/forum/atta...mentid=1962409

pedro w rdz 01-27-2014 05:48 AM

Great

Hey steve what prop do you have on those dle 20?

Thanks

Lifer 01-27-2014 08:54 AM

DLE's 20's run great on 16x8's and 17x6's. In my experience, Xoars pull the best, but APC's do well, also.

Cub_Boy 01-27-2014 12:52 PM

Brothers,

I apologize for my absence; I have been on the road the last 3 weeks for work which affords me very little time for much else but work. I do check the site when I can and do my best to update any new member requests that I get (I am sure I will miss someone, if I do just e-mail me directly). Please keep up the great posts and sharing your P-47 secrets as you build those fantastic Jugs!

Rick

Cub_Boy 01-27-2014 12:56 PM

Brothers,

The following NEW MEMBER was added today; should you forget your membership number please see the membership list that is attached to post #2 for your membership number!

[TABLE="width: 450"]
[TR]
[TD="width: 98"]tardster
[/TD]
[TD="width: 199"]P-47 Thunderbolt Brotherhood #108
[/TD]
[/TR]
[/TABLE]


We currently stand at 108 members of the P-47 Thunderbolt Brotherhood


*** NOTE*** I ONLY ADD YOU TO THE MEMBERSHIP LIST IF YOU REQUESTED IT

stevegauth30 01-27-2014 03:01 PM


Originally Posted by pedro w rdz (Post 11721268)
Great

Hey steve what prop do you have on those dle 20?

Thanks

I think all the warbirds run a 17/6 APC.

sparky4lawndart 01-27-2014 03:11 PM

15 Attachment(s)
Here is an update on my TF GS German Jugg... Scheiße...


http://www.rcuniverse.com/forum/atta...mentid=1962622http://www.rcuniverse.com/forum/atta...mentid=1962635http://www.rcuniverse.com/forum/atta...mentid=1962634http://www.rcuniverse.com/forum/atta...mentid=1962633http://www.rcuniverse.com/forum/atta...mentid=1962632http://www.rcuniverse.com/forum/atta...mentid=1962631http://www.rcuniverse.com/forum/atta...mentid=1962630http://www.rcuniverse.com/forum/atta...mentid=1962629http://www.rcuniverse.com/forum/atta...mentid=1962628http://www.rcuniverse.com/forum/atta...mentid=1962627http://www.rcuniverse.com/forum/atta...mentid=1962626http://www.rcuniverse.com/forum/atta...mentid=1962625http://www.rcuniverse.com/forum/atta...mentid=1962624http://www.rcuniverse.com/forum/atta...mentid=1962623http://www.rcuniverse.com/forum/atta...mentid=1962636

DOC 01-27-2014 03:56 PM

I'm on my second H-9 P47-60 with a DLE 20. I use them for Warbird Racing. Both do 108 MPH straight and level. I have never had a Flutter problem !

bobbydee 01-27-2014 04:29 PM

thank you cub-boy! I followed your signature instructions too. would have taken alot longer without them.sorry for interupting tread...

bobbydee 01-27-2014 04:31 PM

you guys and your DLE's are animals!


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