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GSC Prop blades

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Rex Hefferan

Joined: 10 Jan 2006
Posts: 147
Location: Olney Springs, Colorado USA "NOT a Kitpig"

Posted: Sun Apr 06, 2008 8:51 pm Post subject: GSC Prop blades

Yes, I read that and have sent an email to GSC asking about the 

replacement blades which came with the airplane I bought to repair. I 

suspect the TBO is meant to apply to blades installed in a hub. I will 

let the list know what they say.



-- 

Rex Hefferan

SE Colorado / K-II / 582-C / still waiting repairs

Noel Loveys wrote:



[quote]



New... Over five years old???  GSC has a TBO on the blades something like

five years or 500 Hr....Whichever first.



Noel



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_________________
Rex
N740GP - M2/582
Colorado

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Mon Apr 07, 2008 12:26 am Post subject: Re: GSC Prop blades

 	  Quote: 	
		  Yes, I read that and have sent an email to GSC asking about the 

replacement blades which came with the airplane I bought to repair. I 

suspect the TBO is meant to apply to blades installed in a hub. I will 

let the list know what they say. 



-- 

Rex Hefferan 	




Rex, When you call GSC , Rick Peters will tell you the same thing  -- 5 years !! REplace the blades.  Hub will likely be ok but blades  ..........hmmmmmmmmmmmmmmmmmm



I just ordered another one from him last week. Nice props and blades are cheap.  I would get urethane leading edge on any new blade.   TEll him i sent you and it will cost you more ... just joking it will likely cost you less if you order through   http://www.rotaxservices.com/



look at my last post .....  here is pic again .

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_________________
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Fox5flyer
Guest

Posted: Mon Apr 07, 2008 3:26 am Post subject: GSC Prop blades

Rex, another option is to just call GSC for an overhaul estimate and if not 

to outrageous, have them make it right.

Deke Morisse

Mikado Michigan

S5/Subaru/CAP 355+ TT

"The aim of an argument or discussion should not be victory, but progress."

- Joseph Joubert





---

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Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Mon Apr 07, 2008 6:19 am Post subject: GSC Prop blades

The 500 hr part would be from installation the 5yr part would be from manufacture.    

   

These blades are wood.  They are held to the hub by a smaller, comparatively speaking, root.  Older props of this make have been known to break off at the root leaving a good portion of wood inside the hub.  If your blades are loose and the hub is torque down so there is no space at all between the front plate and the rear plate then the prop roots have been damaged.  The cells in the wood have been damaged , read weakened.  The best thing to do with them is to make up a hub and use the blades on a wind charger ...  or hang them in your den with a clock in the hub.  

   

I wouldn't even ground run those blades.  Blade departures aren’t unknown why take a chance?  

   

I was in exactly the same position you are in and to this day I’m happy I bought a new prop.  

   

   

[img]cid:image001.jpg(at)01C898A5.09305F50[/img]  

   

Noel Loveys  

Campbellton, NL, Canada  

CDN AME intern, PP-Rec  

C-FINB, Kitfox III-A  

582 B box, Ivo IFA, Aerocet 1100 floats  

[url=noelloveys(at)yahoo.ca]noelloveys(at)yahoo.ca[/url]  

   

   

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Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Mon Apr 07, 2008 2:04 pm Post subject: Re: GSC Prop blades

 	  Quote: 	
		  Rex, another option is to just call GSC for an overhaul estimate and if not 

to outrageous, have them make it right. 

Deke Morisse 

Mikado Michigan 

S5/Subaru/CAP 355+ TT 	




Deke,  I am not aware of any overhaul on  a GSC prop.  They are just a throw away unit as are most of the props we play with .  You cannot magnaflux a wood prop and the weak link is in the root end.  

Just replace after a set time and or hours flown to be safe.

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shinco(at)bright.net
Guest

Posted: Mon Apr 07, 2008 3:34 pm Post subject: GSC Prop blades

Noel Loveys wrote:

[quote]

 The 500 hr part would be from installation the 5yr part would be from 

 *_manufacture_*.



 These blades are wood. They are held to the hub by a smaller, 

 comparatively speaking, root. Older props of this make have been known 

 to break off at the root leaving a good portion of wood inside the 

 hub. If your blades are loose and the hub is torque down so there is 

 no space at all between the front plate and the rear plate then the 

 prop roots have been damaged. The cells in the wood have been damaged 

 , read weakened. The best thing to do with them is to make up a hub 

 and use the blades on a wind charger ... or hang them in your den with 

 a clock in the hub.



 I wouldn't even ground run those blades. Blade departures aren’t 

 unknown why take a chance?



 I was in exactly the same position you are in and to this day I’m 

 happy I bought a new prop.



 Sigtaturea



 *Noel Loveys*



 Campbellton, NL, Canada



 CDN AME intern, PP-Rec



 C-FINB, Kitfox III-A



 582 B box, Ivo IFA, Aerocet 1100 floats



 noelloveys(at)yahoo.ca



 --

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Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Tue Apr 08, 2008 11:20 am Post subject: GSC Prop blades

Steve:  

   

I replaced it with an Ivo IFA for two reasons.    

1 the Ivo is very light.  The UL - IFA with the hub and all is much lighter than the GSC  

2. I wasn't getting the power out of the GSC I thought I should have been getting...  I was right.  Not because of a problem with the prop but a problem with the tachometer.  My tach was reading 20-% high across the whole envelope.  That means at idle I was only turning around 1800 rpm... Read shook like a S.O.B. and at full throttle (6800 rpm on floats) I was actually only getting 5400 rpm.  I don't think the prop, fifteen years old could have taken the full 6800 rpm.  

   

With all composite props I still advise getting your torque wrench calibrated.  I calibrated mine with twenty pounds of weight slung exactly ten inches horizontally from the centre of the stud (200lb. in.) slinging at 12' gave me the calibration for 240 lb. in..  I then just noted my calibration points.  In my case both calibration points were exactly minus 13 lb. in.  So to set my wrench for 200 lb. in. Calibrated I set it for 187 lb.in..  If I had to torque to 100 lb. in. I would just do another calibration.  

   

Just a note for Canadian certified aircraft owners the above method of calibration is not a certified method... as practical as it is.  

   

When I got the Ivo first I noticed that there were no holes in the heads of the bolts.  I figured this was a mistake on the behalf of Ivo so I called them to check why no lockwire holes.  I was told the intentionally don't lock wire their props because they want you to check the torque on a regular basis and some people don't like to cut lock wire.  Being a well trained Canadian AME (Aircraft Maintenance Engineer) I do as I'm told and didn't use drilled bolts for the hub.  

   

My experience with the Ivo is it is a very smooth prop and very light too.  I never got around to setting the pitch stops and to be honest I think it's better to be able to run a bit further than normally used to keep additional load off the small planetary gears that operate the hub.  I also noticed although it was the same length as my GSC it doesn’t pick up spray the same way.  With the GSC I was always filling pits in the leading edges of the blades... The Ivo hasn't had that need.  

   

There are some people out there who don’t like the flexibility of the Ivo.  I think its flexibility is part of the reason it is so smooth.  

   

   

[img]cid:image003.jpg(at)01C89998.518F8CA0[/img]  

   

Noel Loveys  

Campbellton, NL, Canada  

CDN AME intern, PP-Rec  

C-FINB, Kitfox III-A  

582 B box, Ivo IFA, Aerocet 1100 floats  

[url=noelloveys(at)yahoo.ca]noelloveys(at)yahoo.ca[/url]  

   

   

   

   

   

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Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

shinco(at)bright.net
Guest

Posted: Tue Apr 08, 2008 2:50 pm Post subject: GSC Prop blades

Noel Loveys wrote:

[quote]

 Steve:



 I replaced it with an Ivo IFA for two reasons.



 1 the Ivo is very light. The UL - IFA with the hub and all is much 

 lighter than the GSC



 2. I wasn't getting the power out of the GSC I thought I should have 

 been getting... I was right. Not because of a problem with the prop 

 but a problem with the tachometer. My tach was reading 20-% high 

 across the whole envelope. That means at idle I was only turning 

 around 1800 rpm... Read shook like a S.O.B. and at full throttle (6800 

 rpm on floats) I was actually only getting 5400 rpm. I don't think the 

 prop, fifteen years old could have taken the full 6800 rpm.



 With all composite props I still advise getting your torque wrench 

 calibrated. I calibrated mine with twenty pounds of weight slung 

 exactly ten inches horizontally from the centre of the stud (200lb. 

 in.) slinging at 12' gave me the calibration for 240 lb. in.. I then 

 just noted my calibration points. In my case both calibration points 

 were exactly minus 13 lb. in. So to set my wrench for 200 lb. in. 

 Calibrated I set it for 187 lb.in.. If I had to torque to 100 lb. in. 

 I would just do another calibration.



 Just a note for Canadian certified aircraft owners the above method of 

 calibration is not a certified method... as practical as it is.



 When I got the Ivo first I noticed that there were no holes in the 

 heads of the bolts. I figured this was a mistake on the behalf of Ivo 

 so I called them to check why no lockwire holes. I was told the 

 intentionally don't lock wire their props because they want you to 

 check the torque on a regular basis and some people don't like to cut 

 lock wire. Being a well trained Canadian AME (Aircraft Maintenance 

 Engineer) I do as I'm told and didn't use drilled bolts for the hub.



 My experience with the Ivo is it is a very smooth prop and very light 

 too. I never got around to setting the pitch stops and to be honest I 

 think it's better to be able to run a bit further than normally used 

 to keep additional load off the small planetary gears that operate the 

 hub. I also noticed although it was the same length as my GSC it 

 doesn’t pick up spray the same way. With the GSC I was always filling 

 pits in the leading edges of the blades... The Ivo hasn't had that need.



 There are some people out there who don’t like the flexibility of the 

 Ivo. I think its flexibility is part of the reason it is so smooth.



 Sigtaturea



 *Noel Loveys*



 Campbellton, NL, Canada



 CDN AME intern, PP-Rec



 C-FINB, Kitfox III-A



 582 B box, Ivo IFA, Aerocet 1100 floats



 noelloveys(at)yahoo.ca



 --

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