Re: Prop Hub material UC 61K Argus III

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Terry Gardner
Posts: 2
Joined: Mon Jan 15, 2018 9:58 am

Re: Prop Hub material UC 61K Argus III

Post by Terry Gardner »

'over here a part for a certified aircraft that is readily available "PMA" has to be used. One cannot make and put on as ower approved mfg. The are available from parts houses here and John Duncan has them. have the part tested as part of your acceptance agreement of it.
--------------------------------------------
On Mon, 1/15/18, Ji?í Horák jerry.fly@seznam.cz [fairchildclub] wrote:

Subject: Re: [fairchildclub] Prop Hub material UC 61K Argus III
To: fairchildclub@yahoogroups.com
Date: Monday, January 15, 2018, 11:42 AM


 









Hi Terry,
Thanks very much. It is Warner 6
bolt hub for sure. Will find the P/N once I will get to the
Hanger. Found the cracks only on plater. The rest of the hub
is fine.
Jiri







15. 1. 2018 v 16:58, Terry
Gardner gtg15751@yahoo.com
[fairchildclub] :
please start with what part
number is on your existing hub. also Fairchild used several
mfgs for hubs. John Duncan has several WARNER 6 bolt warner
hubs and may have source for the 8 bolt.I have used both on
Rangers . the Sensenich tcds lists:hubs;7900, 8350, 8599
8808, 43D24385 and
all are available for purchase. you might be able to find a
source for the hub under US AN parts specifications drawings
which thes hubs will meet 
for Ranger
propsW86RB-60 W86BB-55
gTG
--------------------------------------------
On Sun, 1/14/18,
Ji?í Horák jerry.fly@seznam.cz [fairchildclub]

wrote:

Subject:
[fairchildclub] Prop Hub material UC 61K Argus III
To: fairchildclub@yahoogroups.com
Date: Sunday,
January 14, 2018, 2:15 PM


 









Hi everyone,



I've just found a cracks on
the front prop hub plate on
my Ranger powered UC 61K. We are
able to manufacture new
one. Could somebody send me a
type of material and heat
treatment required? (we found
that HRD is 88, which is
pretty ordinary steel)



Thanks very much indeed,



Jiri Horak



UC 61K S/N 1120 ex RAF KK 502 -
pre reg N 502KK













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'
Top
Ji?í Horák
Posts: 14
Joined: Tue Jan 14, 2020 8:17 am

Re: Prop Hub material UC 61K Argus III

Post by Ji?í Horák »

'I Know Terry, to manufacture a new one is the last option we have. We are capable to manufacture almost everything over here, but PMA parts always preferred if available :-).
Jiri



17. 1. 2018 v 4:25, Terry Gardner gtg15751@yahoo.com [fairchildclub] :
over here a part for a certified aircraft that is readily available "PMA" has to be used. One cannot make and put on as ower approved mfg. The are available from parts houses here and John Duncan has them. have the part tested as part of your acceptance agreement of it.
--------------------------------------------
On Mon, 1/15/18, Ji?í Horák jerry.fly@seznam.cz [fairchildclub] wrote:

Subject: Re: [fairchildclub] Prop Hub material UC 61K Argus III
To: fairchildclub@yahoogroups.com
Date: Monday, January 15, 2018, 11:42 AM


 









Hi Terry,
Thanks very much. It is Warner 6
bolt hub for sure. Will find the P/N once I will get to the
Hanger. Found the cracks only on plater. The rest of the hub
is fine.
Jiri







15. 1. 2018 v 16:58, Terry
Gardner gtg15751@yahoo.com
[fairchildclub] :
please start with what part
number is on your existing hub. also Fairchild used several
mfgs for hubs. John Duncan has several WARNER 6 bolt warner
hubs and may have source for the 8 bolt.I have used both on
Rangers . the Sensenich tcds lists:hubs;7900, 8350, 8599
8808, 43D24385 and
all are available for purchase. you might be able to find a
source for the hub under US AN parts specifications drawings
which thes hubs will meet 
for Ranger
propsW86RB-60 W86BB-55
gTG
--------------------------------------------
On Sun, 1/14/18,
Ji?í Horák jerry.fly@seznam.cz [fairchildclub]

wrote:

Subject:
[fairchildclub] Prop Hub material UC 61K Argus III
To: fairchildclub@yahoogroups.com
Date: Sunday,
January 14, 2018, 2:15 PM


 









Hi everyone,



I've just found a cracks on
the front prop hub plate on
my Ranger powered UC 61K. We are
able to manufacture new
one. Could somebody send me a
type of material and heat
treatment required? (we found
that HRD is 88, which is
pretty ordinary steel)



Thanks very much indeed,



Jiri Horak



UC 61K S/N 1120 ex RAF KK 502 -
pre reg N 502KK













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David Stout
Posts: 9
Joined: Sat Oct 07, 2017 4:07 am

Re: Prop Hub material UC 61K Argus III

Post by David Stout »

'Does anyone have experience or know of someone that has installed a metal propeller on a PT-23 with a w-670  continental engine. A very common installation on a Stearman. The TCDS only specs out wood so a 337 would be required. Any help would be appreciated 

Dave 
On Jan 16, 2018, at 3:27 PM, gtg15751@yahoo.com [fairchildclub] wrote:
 
?we had Avmats at KSUS test our hub after a bolt head! broke off.
Sent from my BlackBerry 10 smartphone. From: Hugh Loewenhardt hughc8c@yahoo.com [fairchildclub]Sent: Tuesday, January 16, 2018 10:50To: fairchildclub@yahoogroups.comReply To: fairchildclub@yahoogroups.comSubject: Re: [fairchildclub] Prop Hub material UC 61K Argus III
 
Jiri, Be sure to review all Sensenich technical documents for installation of wood propellers, all available on internet, when reinstalling your propeller and hub and for periodic maintenance requirements. The cracks in your front plate may be fatigue cracks from cyclic loading of the plate due to improper/uneven bolt torques. Also, consider having your hub tested for internal cracks which may not be visible on the hub surfaces. 

On Tuesday, January 16, 2018 7:41 AM, "Ji?í Horák jerry.fly@seznam.cz [fairchildclub]" wrote:


  Thanks very much Hugh,
that's help a lot.
Jiri


16. 1. 2018 v 4:49, Hugh Loewenhardt hughc8c@yahoo.com [fairchildclub] :

Jiri,
  In lieu of finding the original material for your propeller plate, McMaster Carr Company, in the US, has certified 4130 alloy steel plate, in suitable dimensions, of Rockwell hardness B85, very close to B88 you specified. The 4130 plate can be heat treated to C60.  Also, check out "making an aircraft propeller hub" on YouTube. Good machining information and also a material suggestion which makes sense considering the application for an aircraft propeller clamping, pressure(friction) plate.
  Hugh Loewenhardt

On Sunday, January 14, 2018 3:15 PM, "Ji?í Horák jerry.fly@seznam.cz [fairchildclub]" wrote:


 Hi everyone,

I've just found a cracks on the front prop hub plate on my Ranger powered UC 61K. We are able to manufacture new one. Could somebody send me a type of material and heat treatment required? (we found that HRD is 88, which is pretty ordinary steel)

Thanks very much indeed,

Jiri Horak

UC 61K S/N 1120 ex RAF KK 502 - pre reg N 502KK










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