Today's Message Index:
----------------------
1. 12:00 AM - 020 empenage skins (Steve Sampson)
2. 05:53 PM - Re: 020 empenage skins (rob ray)
3. 07:15 PM - Re: 020 empenage skins (arvil@bellsouth.net)
Message 1
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| Subject: | 020 empenage skins |
--> RV4-List message posted by: "Steve Sampson" <SSampson.SLN21@london.edu>
Is there any concensus as to the need for 020 skins on the empenage? I understand
it is an option, but its also weight at the back. Does RTV on the ribs solve
the problem with 016/
Thanks, Steve.
Message 2
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| Subject: | Re: 020 empenage skins |
--> RV4-List message posted by: rob ray <smokyray@yahoo.com>
Steve,
There is a reason the RV8 and beyond use .020, it's stronger. My 1500 hour RV4
has cracks in the rudder, one place I wish I had .020. The weight penalty isn't
that much and using RTV is not recommended as temperature changes can affect
it's elasticity. The .020 skins from Van's are reasonably priced and pre-bent,
just tell them what you want.
Wish list: If I had it to do over I would have .020 tail feathers and .040 forward
fuselage skins all the way back to the 1st aft bulkhead (HRII), RV6 wing
tanks or the Hotel Whiskey tanks, hopped up 160HP by LyCon and Aerocomposites
C/S prop, shear wingtips, pre-preg cowling...etc.
OK, mine still isn't bad like it is, stock and light, 175HP 0-320, wood/composite
FP prop and 950# lbs empty. Hindsight is always 20/20...
Rob Ray
Steve Sampson <SSampson.SLN21@london.edu> wrote:
--> RV4-List message posted by: "Steve Sampson"
Is there any concensus as to the need for 020 skins on the empenage? I understand
it is an option, but its also weight at the back. Does RTV on the ribs solve
the problem with 016/
Thanks, Steve.
---------------------------------
Message 3
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| Subject: | Re: 020 empenage skins |
--> RV4-List message posted by: arvil@bellsouth.net
Steve,
One of the biggest problems on the tail is is the flexing of the elevators diagonal
stiffners can help some but as Rob, said the best fix is .020 elevator and
rudder skins , if using .016 skin watch for cracks 6 inches in from the evelator
counter weight along the trailing edge , to help reduce the cracking of the
rudder or the elevators make a
good radius at the trailing edge of the stiffners and make sure they are filed
smooth this will keep down the sharp edges that can lead to early cracking
Another problem that leads to early cracking of the tail surfaces is to lowe of
an idle below 500 rpm and it can set up a viberation in the tail, again the fix
is the .020 skin,
Arvil
rob ray wrote:
> --> RV4-List message posted by: rob ray <smokyray@yahoo.com>
>
> Steve,
> There is a reason the RV8 and beyond use .020, it's stronger. My 1500 hour
RV4 has cracks in the rudder, one place I wish I had .020. The weight penalty
isn't that much and using RTV is not recommended as temperature changes can affect
it's elasticity. The .020 skins from Van's are reasonably priced and pre-bent,
just tell them what you want.
> Wish list: If I had it to do over I would have .020 tail feathers and .040 forward
fuselage skins all the way back to the 1st aft bulkhead (HRII), RV6 wing
tanks or the Hotel Whiskey tanks, hopped up 160HP by LyCon and Aerocomposites
C/S prop, shear wingtips, pre-preg cowling...etc.
> OK, mine still isn't bad like it is, stock and light, 175HP 0-320, wood/composite
FP prop and 950# lbs empty. Hindsight is always 20/20...
>
> Rob Ray
>
> Steve Sampson <SSampson.SLN21@london.edu> wrote:
> --> RV4-List message posted by: "Steve Sampson"
>
> Is there any concensus as to the need for 020 skins on the empenage? I understand
it is an option, but its also weight at the back. Does RTV on the ribs solve
the problem with 016/
>
> Thanks, Steve.
>
>
> ---------------------------------
>
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