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  #121  
Old 08-29-2018, 05:43 AM
todehnal todehnal is offline
 
Join Date: Jan 2005
Location: Kentucky Lakes area in KY
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Quote:
Originally Posted by steveb View Post
Sensenich beefed up the original "big hole" hub cover style in the trouble area so that they would still be compatible with revision D and older hubs, thus allowing use of the original pitch cylinder for setting blade angle.
Of course, you can always use a protractor if you want and not use the pitch cylinder.

Our hub vendor has a 3-4 month lead time, so Sensenich geared up production of revision "D1" replacements in-house, with deliveries planned to begin in early September.

While revision "E" and later hub covers will fit on older hubs, the blade pitch pins won't line up, so you have to use a protractor for setting blade angles.

We can supply revision "F" hub covers upon customer request, but note that these will not be available until later in the Fall after delivery of all current orders for revision "D1" covers.
Sensenich plans to begin in-house production of revision "F" hubs in the mid to late 4th quarter of 2018.

steve from Sensenich
Wow!! I am ecstatically excited to hear that the "F" hub will be offered. Since I have no cracks now, I am good with waiting for an "F" hub. This is the best news of the day. Your logic does make sense in offering the D1 hub, and many will opt for it in order to retain the pitch cylinder functionality. I am glad to hear that you are offering us a choice. Thanks..................Tom
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  #122  
Old 08-29-2018, 10:57 AM
steveb steveb is offline
 
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Location: FL
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Quote:
Originally Posted by rjtjrt View Post
Re F Hub covers availability, Thanks Steve.
Could you come back to us in future, when the F hub covers become available?
John
Will do.
"D1" covers will start shipping early September.
"F" covers hopefully will start shipping in November or early December.

If customers want to switch their hub cover order over to revision "F":
-let us know ASAP so we can update the order in our system
-shipment won't be till later this Fall (as above)
-you will have to use a protractor to set blade angles (since the hubs subject to the service bulletin have a non-compatible pitch system).


steve from sensenich.
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  #123  
Old 09-28-2018, 09:18 AM
dick seiders dick seiders is offline
 
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Just received new hub. Looks like original. Design change on replacement or what. Will check with Sensenich.
Dick seiders
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  #124  
Old 09-28-2018, 09:46 AM
dick seiders dick seiders is offline
 
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Sensinich informs me that the d hub is the correct
replacement for the original. I was under the impression there were only three small holes in the new one. Actually it looks very much like the original. Anyone else have same reaction?
Dick Seiders
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  #125  
Old 09-28-2018, 10:07 AM
dick seiders dick seiders is offline
 
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Just read last few pages to get caught up (duh).
I am fine with the d1. I have no cracks
on the original. The F sounds like overkill to me.
Dick Seiders
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  #126  
Old 09-28-2018, 10:16 AM
DHeal DHeal is offline
 
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Location: Windsor, California
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Right after I sent my double-cracked original hub cover to Sensenich they sent me (and I paid for) the newer "D1" hub cover. The D1 cover looks somewhat the same as the original cover but is thicker in cross-section near the perimeter of the big round pitch adjustment hole. The Sensenich engineer assured me that the D1 cover was much stronger than the original and was more than adequate to the task. I guess we'll see if that proves true.

It is my understanding that the three-hole hub cover is an optional alternative offered by Sensenich but its availability may be delayed by production issues. The use of a three-hole cover on an older one-big-hole cover means that you lose the auto-adjustment capability (not a big deal in my view) or you have to send the whole prop back to Sensenich for a pitch-adjuster mod. Lots of info on this in previous posts. Also, read Sensenich's FAQ and SB.
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  #127  
Old 09-28-2018, 10:17 AM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
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Quote:
Originally Posted by dick seiders View Post
Just read last few pages to get caught up (duh).
I am fine with the d1. I have no cracks
on the original. The F sounds like overkill to me.
Dick Seiders
.
If "F" hub is overkill I'm sure Van's and Sensenich would continue to offer original design with large pitch change cylinder. The "F" hub is the latest design that incorporates gage pins to set rough prop pitch and eliminates the large central hole.

I don't think you can have "overkill" when it comes to safety...
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  #128  
Old 09-28-2018, 10:39 AM
dick seiders dick seiders is offline
 
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You are miss reading my statement. Absolute assurance against failure of a component is not possible. Sensinich engineer I spoke with stated the d1 hub design is 90 % less likely to fail than original design. That sounds like a significant improvement to me. The F hub is coming later, and requires some additional changes that may create new issues, not to mention cost and downtime. Itll likely be fine as well. You get the information and make your choices.
Dick Seiders
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  #129  
Old 09-28-2018, 11:02 AM
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Piper J3 Piper J3 is offline
 
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I don't think I misread. 90% safety improvement is not nearly good enough for me. If Vans and Sensenich are using the "F" hub on all new installations that's where I want to be. I now have a "B" rear hub and "F" front hub with no worries about catastrophic inflight failure.
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Jim Stricker
Hinckley, Ohio
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PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC
1130 hrs Flying 46 Piper J-3 Cub
RV-12 E-LSA #120058 AWC Jul 2012 - Bought Flying Oct 2015 with 48TT - Hobbs now 406

LSRM-A Certificate 2016
Special Thanks to EJ Trucks
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  #130  
Old 09-28-2018, 01:07 PM
Dave12 Dave12 is online now
 
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Quote:
Originally Posted by Piper J3 View Post
I now have a "B" rear hub and "F" front hub with no worries about catastrophic inflight failure.
If you say so.
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