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  #231  
Old 06-09-2018, 05:25 PM
RandyAB RandyAB is offline
 
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Quote:
Originally Posted by johnbright View Post
Thanks Charlie... your comments inspired me to add a second 10-32 stud.

More photos at https://photos.app.goo.gl/ZKjbqnU3DfkUKNex2
Forgive my ignorance but why wouldn't you just stack the terminals for the primary and secondary power inputs on the stud provided? Seems like there is plenty of room.
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  #232  
Old 06-09-2018, 05:40 PM
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johnbright johnbright is offline
 
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Quote:
Originally Posted by RandyAB View Post
Forgive my ignorance but why wouldn't you just stack the terminals for the primary and secondary power inputs on the stud provided? Seems like there is plenty of room.
The concept is that if there is somehow a failure at one stud there will be a backup stud. There will be two independent power sources into the bus and it gives greater reliability to have separate studs also.
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Last edited by johnbright : 08-11-2020 at 08:41 PM.
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  #233  
Old 06-09-2018, 05:42 PM
rv7charlie rv7charlie is offline
 
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I can follow his logic. If you feel you need redundant power feeds to a bus, the single stud would be a single point of failure for both feeds if it came loose.
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  #234  
Old 06-09-2018, 06:59 PM
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rmartingt rmartingt is offline
 
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Thanks, John! I've been musing over that very idea and you've saved me some work. Nice pictures!
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  #235  
Old 06-09-2018, 10:16 PM
RandyAB RandyAB is offline
 
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Quote:
Originally Posted by rv7charlie View Post
I can follow his logic. If you feel you need redundant power feeds to a bus, the single stud would be a single point of failure for both feeds if it came loose.
Ya I suppose. Unlikely but possible.
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  #236  
Old 06-10-2018, 09:48 AM
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rv6ejguy rv6ejguy is offline
 
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As I posted in the CPI thread, if you're concerned about a single stud, just split your power supply setups with 2 smaller fuse blocks, say a couple six slot ones instead of a single 12 slot.

I'm not sure how the stud would fail on the Cole Hersee one I showed, since it's actually a bolt penetrating the power strap, unless you way over torque it. Are you folks worrying about all the single points of failure inside that single engine up front too?

Maybe we should be looking at fitting a couple of these to drop out of the belly if the electrical system or powerplant takes a dump?

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Last edited by rv6ejguy : 06-10-2018 at 01:56 PM.
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  #237  
Old 06-10-2018, 10:21 AM
rocketman1988 rocketman1988 is offline
 
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Default but...

What the failure mode on that system?
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  #238  
Old 06-10-2018, 10:29 AM
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Or one of these perhaps...
https://www.ebay.com/itm/Ram-Air-Tur...-/282855057141
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  #239  
Old 06-10-2018, 12:11 PM
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rv6ejguy rv6ejguy is offline
 
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Quote:
Originally Posted by Walt View Post
My idea covers failure of both powerplant and electrical systems plus propeller malfunctions too...
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  #240  
Old 06-10-2018, 12:14 PM
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rv6ejguy rv6ejguy is offline
 
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Quote:
Originally Posted by rocketman1988 View Post
What the failure mode on that system?
Yes, I see, we'd need independent ignition and fuel systems for each turbine plus a separate door and actuator system to drop them into the airstream independently. Plus a fire warning system, fire extinguishing systems and N1 indicators...
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Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 441.0 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi2.htm



Last edited by rv6ejguy : 06-10-2018 at 01:16 PM.
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