|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

01-05-2013, 04:52 AM
|
 |
|
|
Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
|
|
Demonstrated reliability.
Guys, my Air Tractor is a 1989 model and now has 9500 hours of abuse! Yeah, we work them harder than you can imagine, with literally hundreds of turns, both left and right, per day. Those are coupled with huge rudder inputs because of incredible adverse yaw....we have to replace the rudder cables every year. They're attached just like my RV's..castellated nuts and cotter keys.
Our elevator and aileron pushrods look exactly like Van's RV's and use a nyloc nut for attachment and in all these years and hours, no nyloc nut has ever fallen off. They're certified airplanes with an FAA inspector on the assembly line and they come that way.
Best,
__________________
Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
Last edited by pierre smith : 01-05-2013 at 04:54 AM.
Reason: adds
|

01-05-2013, 06:14 AM
|
 |
|
|
Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
|
|
Quote:
Originally Posted by Rick S.
To apply a simple principle to all of this discussion. A fastener is only as good as its installation. Avoid blaming a nut for failure if the nut never had the chance.
|
Quote of the Year!
Every properly installed nut has a nut builder behind it.
__________________
RV-7 : In the hangar
RV-10 : In the hangar
RV-12 : Built and sold
RV-44 : 4 place helicopter on order.
|

01-05-2013, 10:32 AM
|
 |
|
|
Join Date: Jan 2007
Location: Battleground
Posts: 4,348
|
|
Quote:
Originally Posted by Rick S.
To apply a simple principle to all of this discussion. A fastener is only as good as its installation. Avoid blaming a nut for failure if the nut never had the chance.
|
Nailed it!
Larry nailed it too. We are all a little nuts.
__________________
Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
|

01-05-2013, 10:40 AM
|
 |
|
|
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
|
|
Quote:
Originally Posted by pierre smith
....
Our elevator and aileron pushrods look exactly like Van's RV's and use a nyloc nut for attachment and in all these years and hours, no nyloc nut has ever fallen off. They're certified airplanes with an FAA inspector on the assembly line and they come that way.
Best,
|
Even certified German factories can screw up...
http://www.ntsb.gov/aviationquery/br...98LA209&akey=1
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
|

01-05-2013, 10:37 PM
|
|
|
|
Join Date: Apr 2009
Location: USA
Posts: 1,499
|
|
The use of elevator trim, autopilot and throttle would be my choices in this particular failure. Not something we practice for. Our -10 is tougher than I thought. I sure am glad they are alive. All of that oil on the bottom sure seems excessive for break-in.
__________________
Good judgment comes from experience, and a lot of that comes from bad judgment.
|

01-05-2013, 10:53 PM
|
|
|
|
Join Date: Jul 2009
Location: Lee's Summit, MO
Posts: 747
|
|
Steel lock nuts
I will use steel lock nuts for final assembly on all control surfaces and pushrods. The nylon lock nut provides about 1 or 2 in/lbs of resistance and the steel lock nut provides about 7 or 8 in/lbs according to my testing. Just a little extra insurance.
__________________
Robert Williams
Lee's Summit, MO
RV-8 - Empennage & Wings Done
Working on Fuse
O-360-A1A
1946 Cessna 120
|

01-06-2013, 05:39 AM
|
 |
|
|
Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
|
|
Maybe
Quote:
Originally Posted by Wayne Gillispie
The use of elevator trim, autopilot and throttle would be my choices in this particular failure. Not something we practice for. Our -10 is tougher than I thought. I sure am glad they are alive. All of that oil on the bottom sure seems excessive for break-in.
|
Wayne, I just had a gentleman here for some transition training on Friday and I demoed elevator trim use, and he evaluated it too. You run out of trim during the flair and still need elevator pressure to hold the nose up. As you well know, the -10's are very trim dependant.
These guys may well have started the flair when the elevator let go, and instantly pitched nose over and smacked the pavement with no opportunity to react in the one or two seconds in this episode.
Best,
__________________
Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
|

01-06-2013, 10:54 AM
|
|
|
|
Join Date: Apr 2009
Location: USA
Posts: 1,499
|
|
I have 25 extra lbs of aux battery/hot bus/wiring aft of baggage bulkhead. I flew solo Thur with 40 lbs of baggage. I left trim set after landing and it was still a great amount of nose up trim. I had not trimmed off all of the stick force either or it would have been close to being at max deflection. When I have the whole family on board and do the same thing, there is very little nose up trim needed on landing.
Wonder if we could also use our autopilot if we knew far enough out and high enough? I think I have my "Min Aspd" set at 90 kts, so that would need to be set down around 65 kts in order to keep it from nosing us over. Set up for a 200-300 fpm descent at the longest runway available. The flare would be the tricky part...dialing in a level off or slight climb at just the right moment while not taking out so much power that the nose drops.
This accident pilot did a fantastic job getting down, so not questioning his piloting skills. Just thinking of our options.
__________________
Good judgment comes from experience, and a lot of that comes from bad judgment.
|

01-06-2013, 07:03 PM
|
|
|
|
Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,393
|
|
autopilot
If the connection at the elevator fails, what would the autopilot be connected to???
|

01-06-2013, 07:20 PM
|
|
|
|
Join Date: Apr 2009
Location: USA
Posts: 1,499
|
|
Quote:
Originally Posted by jrs14855
If the connection at the elevator fails, what would the autopilot be connected to???
|
In this case here AP may be another option. Anything aft of pitch servo and one is left with trim, power and weight shifting(which works, we have already tried that up high).
__________________
Good judgment comes from experience, and a lot of that comes from bad judgment.
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 01:27 AM.
|