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Woodcomp SR3000/3 issue

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graeme bird

Joined: 15 Jul 2010
Posts: 434

Posted: Fri Aug 03, 2018 1:16 am Post subject: Woodcomp SR3000/3 issue

Just in case anyone else has the same problem:

twice on a hot day, after a no problems morning flight, on return my CS prop wouldn't come off fully fine or respond at all. Controller etc behaving as expected. The prop is about 6-8 years old and 325 hours and has been great previously. I just had to fly old school controlling RPM by throttle and pitch to keep below max rpm (speed about 80knts).

After investigation of slip rings, wiring, switches etc, I concluded the most likely cause was the two connections between the slip ring and switch wiring (blue and yellow/green), these are under heat shrink and comprise individual nickel plated screw terminals. I found the body plating to have come off and rusty and the terminal screw to also be corroded and rusty.



My plane is always in a hangar. 



If anyone knows how the circuit works I'd be interested to know (its in the manual); I thought I had it worked out but had assumed normally closed switches that open at the limit but it seems they are normally open closing at the limit which has me confused (an electronics engineer). Found slight signs of burn on one contact. I understand the hub/switch arrangement has been changed on the current design.



Another point to note is that although I had painted the collars at blade route with 2 part aluminium primer (which had halted some surface corrosion) During this investigation I saw that I hadn't painted all the way round by the switches. this required some further surface treatment. It would be a bad day if the collar split.

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_________________
Graeme Bird
kit4 (Wagstaff) TBD
Kit3 G-CLXU (Gregory) mono 914 xs Woodcomp
Kit2 G-PATS - (kesterton) Mono Classic 912 warpdrive
Kit 1 G-UMPY - Mono Classic/XS 912S, Woodcomp G(@)gdbmk.co.uk

budyerly(at)msn.com
Guest

Posted: Fri Aug 03, 2018 7:02 am Post subject: Woodcomp SR3000/3 issue

I believe your timed major inspection requirement is due. 

I’m sure it is a simple problem but the maintenance requirements of your prop manufacturer must be followed. 

Woodcomp does not put its maintenance interval on their website.  However instructions came with the prop. 

  

Ref:  Woodcomp SR series Operators Manual  

Hours of operation          Place of work                       Carried out by  

25 hours                            On the aircraft                    Authorised mechanic  

150 hours                          On the aircraft                    Authorised mechanic  

300 hours                         At Service centre                 Producer or Service centre  

450 hours                          On the aircraft                    Authorised mechanic  

600 hours                        At Service centre                  Producer or Service centre  

750 hours                          On the aircraft                    Authorised mechanic  

900 hours                        At Service centre                  Producer or Service centre  

1.050 hours                       On the aircraft                    Authorised mechanic  

1.200 hours                     Plant of producer                 Producer  

WARNING A record of these periodical inspections of the propeller must be kept in the log book. 

  

So I would recommend at 300 hours you pull the prop and fly it or send it to your local service center per the manufacturers maintenance instructions. 

  

In the US this has become too much of a problem for Woodcomp owners due to down time and shipping costs.  We have had three low time (less than 300 hour) Woodcomp props throw blades or the internal mechanism fail here in North America  on just the Pipestral Aircraft, even though the planes were always hangared and flown in blue skies.  So proper service and inspection of these or any prop is essential. 

  

Best Regards, 

Bud Yerly 

  

Sent from  Mail for Windows 10 

  

  From: owner-europa-list-server(at)matronics.com <owner-europa-list-server(at)matronics.com> on behalf of graeme bird <graeme(at)gdbmk.co.uk>

 Sent: Friday, August 3, 2018 5:16:35 AM

 To: europa-list(at)matronics.com

 Subject: Woodcomp SR3000/3 issue  

 

 

  --> Europa-List message posted by: "graeme bird" <graeme(at)gdbmk.co.uk>

 

 Just in case anyone else has the same problem:

 twice on a hot day, after a no problems morning flight, on return my CS prop wouldn't come off fully fine or respond at all. Controller etc behaving as expected. The prop is about 6-8 years old and 325 hours and has been great previously. I just had to fly  old school controlling RPM by throttle and pitch to keep below max rpm (speed about 80knts).

 After investigation of slip rings, wiring, switches etc, I concluded the most likely cause was the two connections between the slip ring and switch wiring (blue and yellow/green), these are under heat shrink and comprise individual nickel plated screw terminals.  I found the body plating to have come off and rusty and the terminal screw to also be corroded and rusty.

 

 My plane is always in a hangar. 

 

 If anyone knows how the circuit works I'd be interested to know (its in the manual); I thought I had it worked out but had assumed normally closed switches that open at the limit but it seems they are normally open closing at the limit which has me confused  (an electronics engineer). Found slight signs of burn on one contact. I understand the hub/switch arrangement has been changed on the current design.

 

 Another point to note is that although I had painted the collars at blade route with 2 part aluminium primer (which had halted some surface corrosion) During this investigation I saw that I hadn't painted all the way round by the switches. this required some  further surface treatment. It would be a bad day if the collar split.

 

 --------

 Graeme Bird

 G-UMPY -  Mono Classic/XS FFW 912S, Woodcomp SR3000/3W CS, trutrak Gemini 2 axis AP, PAW, PFLARM core, ads-b out, 8.33khz, mode S, FP-5, Aera500, SD on Nexus, Smart A3

 350 hours &amp; 6 years on the Mono, 930 total

 g(at)gdbmk.co.uk

 

 

 

 

 Read this topic online here:

 

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graeme bird

Joined: 15 Jul 2010
Posts: 434

Posted: Fri Aug 03, 2018 10:57 am Post subject: Re: Woodcomp SR3000/3 issue

Yep it had the 300hr service by the UK woodcomp man Kevin.

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budyerly(at)msn.com
Guest

Posted: Fri Aug 03, 2018 11:07 am Post subject: Woodcomp SR3000/3 issue

Ouch, that has to hurt.

 

 

   Bud Yerly

 

  Custom Flight Creations

 

 

  From: owner-europa-list-server(at)matronics.com <owner-europa-list-server(at)matronics.com> on behalf of graeme bird <graeme(at)gdbmk.co.uk>

 Sent: Friday, August 3, 2018 2:57:53 PM

 To: europa-list(at)matronics.com

 Subject: Re: Woodcomp SR3000/3 issue  

 

 

  --> Europa-List message posted by: "graeme bird" <graeme(at)gdbmk.co.uk>

 

 Yep it had the 300hr service by the UK woodcomp man Kevin.

 

 --------

 Graeme Bird

 G-UMPY -  Mono Classic/XS FFW 912S, Woodcomp SR3000/3W CS, trutrak Gemini 2 axis AP, PAW, PFLARM core, ads-b out, 8.33khz, mode S, FP-5, Aera500, SD on Nexus, Smart A3

 350 hours &amp; 6 years on the Mono, 930 total

 g(at)gdbmk.co.uk

 

 

 

 

 Read this topic online here:

 

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graeme bird

Joined: 15 Jul 2010
Posts: 434

Posted: Fri Aug 10, 2018 2:39 am Post subject: Re: Woodcomp SR3000/3 issue

Well no not really compared to the service our old Rallye Hartzell. 

It helps that the UK service man Kevin, is central and I can stick it in the car and be there in an hour. I think it was a couple or three hundred odd which I can cope with every 5-6 years.

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