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07-17-2016, 10:27 PM
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Join Date: Jan 2005
Location: Independence, OR
Posts: 228
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Quote:
Originally Posted by Mel
Sorry but that's the way it is.
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Unfortunately.......... I guess that applies, as well, to a lot of things besides airplanes. LOL
Jim
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RV-12 kit (sold)
2006 Rans S-6S Coyote (flying)
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07-17-2016, 10:28 PM
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Join Date: Jul 2009
Location: Coeur d'Alene, ID/Casa Grande, AZ
Posts: 654
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Quote:
Originally Posted by Mel
Sorry but that's the way it is.
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This issue regarding a electrically controlled pitch prop....Mel, if it doesn't take a e-lsa out of performance standards "and is only switchable from outside the cockpit".
Would that effect aircraft certification? Sorry to beat this horse to death, but this has been a question I've had also!!!
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Ric Dickison
307 (CAB) Phantom
Search and Destroy (Can Tho RVN)
Distinguished Flying Cross Society Member
CH-47 & UH-1H "Driver"
Rotax 9 Series Service IRMT
RV-12 Kit#729 "N312RD" is now a full functioning fun machine!! Thanks Van for fulfilling my dream😎
2018 Dues Paid
Last edited by Phantom30 : 07-17-2016 at 10:31 PM.
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07-18-2016, 05:44 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,761
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Quote:
Originally Posted by Phantom30
This issue regarding a electrically controlled pitch prop....Mel, if it doesn't take a e-lsa out of performance standards "and is only switchable from outside the cockpit".
Would that effect aircraft certification? Sorry to beat this horse to death, but this has been a question I've had also!!!
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If the switch is outside of the cockpit and cannot be operated from the cockpit, that's considered as "ground adjustable" and is acceptable.
I've actually done a couple of aircraft like this.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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07-18-2016, 08:34 AM
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Join Date: Oct 2010
Location: La Feria Texas
Posts: 3,822
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How about if I put the switch INSIDE the cockpit with a big sign saying"Never touch this switch when the aircraft is in motion"? This would allow me to be a safer pilot by setting the pitch to match the runway, temperature and obstacles during that takeoff, surely the FAA would be concerned about flight safety and allow this. I would of course then land on a longer runway to adjust it back to cruise pitch for the rest of the trip home.
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07-18-2016, 08:38 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,026
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Quote:
Originally Posted by DonFromTX
How about if I put the switch INSIDE the cockpit with a big sign saying"Never touch this switch when the aircraft is in motion"? This would allow me to be a safer pilot by setting the pitch to match the runway, temperature and obstacles during that takeoff, surely the FAA would be concerned about flight safety and allow this. I would of course then land on a longer runway to adjust it back to cruise pitch for the rest of the trip home.
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That decision couldn't be made just as well at the ramp during your preflight?
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Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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07-18-2016, 08:44 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,761
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Quote:
Originally Posted by DonFromTX
How about if I put the switch INSIDE the cockpit with a big sign saying"Never touch this switch when the aircraft is in motion"? This would allow me to be a safer pilot by setting the pitch to match the runway, temperature and obstacles during that takeoff, surely the FAA would be concerned about flight safety and allow this. I would of course then land on a longer runway to adjust it back to cruise pitch for the rest of the trip home.
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Sorry that won't work. That would be similar to flying a Rocket with a placard that said "Never exceed 120 kts CAS".
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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07-18-2016, 08:57 AM
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Join Date: Aug 2011
Location: New London, NC (near Charlotte), Boulder, CO
Posts: 271
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Quote:
Originally Posted by Mel
Sorry that won't work. That would be similar to flying a Rocket with a placard that said "Never exceed 120 kts CAS".
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Kinda like the big-engined LSA Carbon Cub. |
07-18-2016, 09:12 AM
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Banned
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Join Date: Apr 2015
Location: Altha, FL.
Posts: 114
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Just some background.
The FAA is not the one that placed the in-flight adjustable prop limitations. It was the 4 big players during the inception from the fat Ultralight community that specified that. You can read this in the original preamble during the inception of the LSA rules. The FAA didn't care.
The other item is it is okay to have an in-flight adjustable prop so long as you can not access it during a flight. If the switch is in fact in the cowl and you must be on the ground to adjust it it does fit the definition of a ground adjustable prop. This was confirmed by the top people at the FAA.
That said if the switch is in to cowl and not usable in air it would be an absolute waste of the prop's in-flight qualities and capabilities. Kind of defeats the purpose of an in-flight adjustable prop that's sole purpose is to complement the engine and aircraft performance and you just negated that and now you have additional cost and maint.
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07-18-2016, 09:37 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,761
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Quote:
Originally Posted by AeroDog
Kinda like the big-engined LSA Carbon Cub.
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Almost nearly but not quite hardly!
In the case of the Carbon Cub, the engine manufacture set the usable hp limits. It's not simply an instrument panel placard.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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07-18-2016, 09:47 AM
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Join Date: Oct 2010
Location: La Feria Texas
Posts: 3,822
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So all we need is a prop maker that would put a sticker on the prop that it is "Not to Be Adjusted in Flight" and they could sell them to almost every RV12 person and it would be legal, right?
Unless some FAA guy was flying very close to you, nobody would ever know you touched it.
QUOTE=Mel;1096151]Almost nearly but not quite hardly!
In the case of the Carbon Cub, the engine manufacture set the usable hp limits. It's not simply an instrument panel placard.[/quote]
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