Today's Message Index:
----------------------
1. 01:02 PM - Re: wheel shimmy fixed (Darrell Reiley)
2. 01:27 PM - Re: wheel shimmy fixed (Linn Walters)
3. 05:54 PM - Re: LED Nav Lights (Robin Marks)
Message 1
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| Subject: | Re: wheel shimmy fixed |
I don't know about the 6A, but 25-28 lbs on my 7A will take out the outer t
wo tire treads in no time. I guess it could depend on the tire you're runni
ng too. A good friend adjusted the rake on his nose gear 6 degrees aft-pe
r an engineeers request and it fixed his problem and tire pressure was not
an issue.
-
Best,
-
Darrell
-
-
--- On Fri, 9/10/10, thomas sargent <sarg314@gmail.com> wrote:
From: thomas sargent <sarg314@gmail.com>
Subject: RV-List: wheel shimmy fixed
Just a note for any one who may be having a wheel shimmy problem. (My apolo
gies if everybody already knows this!)
My 6A only has about 7 hours on it.- It had a pretty bad shimmy only upon
landing after it slowed down a lot.- I never determined if it was in the
main gear or the nose gear.- I tried reducing the nose wheel pressure as
some one advised me, but that didn't work.- Joe at Van's told me their 8
A had a similar problem.- It was fixed by reducing the main wheel pressur
e to 25 - 28 psi and the nose gear to 30 - 35.- I originally had about 35
psi all around.- I tried his suggestion and have had no shimmy on the las
t 2- landings.- An easy fix.-
--
Tom Sargent
=0A=0A=0A
Message 2
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| Subject: | Re: wheel shimmy fixed |
From my Grumman experience (castering nosewheel) the drag on the nose
fork produced by the belleville washers directly affects the shimmy
(side to side movement like a bad shopping cart) but tire pressure
didn't seem to make much difference. 6 ply tires have a much stiffer
sidewall and help some, but they're heavier. There are as many ways to
stack the belleville washers as there are ways to corrosion proof. The
best stack looks like |))((| ...... flat washers are '|' and
bellevilles are '( and )'. The drag is measured with a spring scale at
the axle, and can be anywhere from 18 - 25 pounds, with the best numbers
on the high end. Nose gear shimmy will wear out a nose tire much
faster than the mains.
Linn
On 9/13/2010 3:58 PM, Darrell Reiley wrote:
> I don't know about the 6A, but 25-28 lbs on my 7A will take out the
> outer two tire treads in no time. I guess it could depend on the tire
> you're running too. A good friend adjusted the rake on his nose gear 6
> degrees aft per an engineeers request and it fixed his problem and
> tire pressure was not an issue.
> Best,
> Darrell
>
> --- On *Fri, 9/10/10, thomas sargent /<sarg314@gmail.com>/* wrote:
>
>
> From: thomas sargent <sarg314@gmail.com>
> Subject: RV-List: wheel shimmy fixed
> To: "rv-list" <rv-list@matronics.com>
> Date: Friday, September 10, 2010, 11:48 AM
>
> Just a note for any one who may be having a wheel shimmy problem.
> (My apologies if everybody already knows this!)
>
> My 6A only has about 7 hours on it. It had a pretty bad shimmy
> only upon landing after it slowed down a lot. I never determined
> if it was in the main gear or the nose gear. I tried reducing the
> nose wheel pressure as some one advised me, but that didn't work.
> Joe at Van's told me their 8A had a similar problem. It was fixed
> by reducing the main wheel pressure to 25 - 28 psi and the nose
> gear to 30 - 35. I originally had about 35psi all around. I
> tried his suggestion and have had no shimmy on the last 2
> landings. An easy fix.
>
> --
> Tom Sargent
>
> *
>
> =nofollow target=_blank>http://www.matronics.com/Navigator?RV-List
> et=_blank>http://forums.matronics.com
> llow target=_blank>http://www.matronics.com/contribution
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>
>
> *
>
>
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Message 3
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Terry,
Sorry for the late reply. I just completed a 24 hour round trip to Lake
Tahoe where I flew my -10 with 3 large people, 2 sets of golf clubs &
luggage at 11,500/12,500=92 into KTVL. The plane flew great with tail winds
that gave me 184-187 knots GS in extreme comfort. Taking off from KTVL the
DA was 8,300=92 and the plane still climbed at 1,000-1,100 feet/minute and
easily handled the challenges of mountain flying. Keep building!
Here is a follow up note I sent to a fellow builder after he asked me off
line about some leads on where I purchased my bulbs. The best way to search
eBay (for me) was to look up =93Red LED Bulb=94 or =93Green LED Bulb=94 the
n once I
found a Red or Green one I liked including the connection style that
interested me (spring loaded twist vs. push in/pull out) then I looked up
the seller =93see other items=94 link and searched =93Green LED=94 or =93Re
d LED=94
specifically sold by that vendor to make sure they offered both color
bulbs. It=92s really easy. I found a dozen sellers in the matter of a 20
minute eBay search that fit the bill. More than half the sellers that offer
the bulbs I liked also sold a matching Green or Red units.
The top two look like the bulbs I used, the bottom four (links) look like
bulbs I considered that have EVEN MORE colored LED=92s if you want to go th
at
route. Some of the extreme cases have 54 colored LED=92s per bulb. WOW, can
you say Nav Landing Lights? Don=92t stop there, do your own search.
Finally I am NOT depending on the colored mirror Plexi to impart the
Red/Green color on to white LED=92s, they just enhance the effect and look
=93Nav=94 like even when sitting in the hangar.
Regards,
Robin
These look like mine:
http://cgi.ebay.com/ebaymotors/RED-1156-LED-clear-tail-lights-reverse-light
-bulbs-/400153845276?pt=Motors_Car_Truck_Parts_Accessories&hash=item5d2
b071e1c#ht_3763wt_939
[image: http://www.fillthegapphoto.com/img/productimages/1157LEDR]
http://cgi.ebay.com/ebaymotors/GREEN-1156-LED-Clear-Tail-lights-Reverse-Lig
ht-Bulb-/400152368963?pt=Motors_Car_Truck_Parts_Accessories&hash=item5d
2af09743#ht_3781wt_939
[image: http://www.fillthegapphoto.com/img/productimages/1157LEDG]
Here is a Crazy Large number of LED=92s in a light with the LED=92s on the
side
as well as the top (available in different bayonet styles).
54 Red:
http://cgi.ebay.com/ebaymotors/12V-RED-54-LED-Auto-Motorcycle-Tail-Brake-11
57-BAY15D-/130422626859?pt=Boat_Parts_Accessories_Gear&hash=item1e5dcb5
a2b#ht_821wt_1165
54 Green:
http://cgi.ebay.com/ebaymotors/12V-GREEN-54-LED-Marine-Boat-Navigation-Bulb
-1142-BA15D-/140268438045?pt=Boat_Parts_Accessories_Gear&hash=item20a8a
6821d#ht_761wt_1165
20 LED=92s Red & Green
http://cgi.ebay.com/ebaymotors/2x-1157-Bay15d-18-Super-Flux-LED-Brake-Light
-Bulb-GREEN-/220661050772?pt=Motors_Car_Truck_Parts_Accessories&hash=it
em33606c6d94#ht_8331wt_981
[image:
http://peraccurate.myweb.hinet.net/images/CS180/1157/EBAYPB-CS180G-121572.j
pg]
http://cgi.ebay.com/ebaymotors/2x-1157-Bay15d-18-Super-Flux-LED-Brake-Light
-Bulb-RED-/390227248315?pt=Motors_Car_Truck_Parts_Accessories&hash=item
5adb5b44bb#ht_8367wt_981
[image:
http://peraccurate.myweb.hinet.net/images/CS180/1157/EBAYPB-CS180R-121572.j
pg]
*From:* owner-rv-list-server@matronics.com [mailto:
owner-rv-list-server@matronics.com] *On Behalf Of *Terry Mortimore
*Sent:* Sunday, September 12, 2010 9:29 AM
*To:* rv-list@matronics.com; rv10-list@matronics.com
*Subject:* Re: RV-List: LED Nav Lights
Hi Robin, I apologize for not following this thread as closely as I should
have.
The lights really look good, I've looked in the archive but can't find any
previous notes regarding the lights you used.
A ebay search came up with 200,000 hits, can you give us some light
descriptions or part numbers to help a brother builder out?
I see on ebay white and red LED lights but no Green. Do you relie on the
green and red mirrored plexi for the colour or are green bulbs available?
Can you point us in the right direction for the coloured plexi?
Is the second bulb in your installation a strobe? If so are these roll your
own as well?
Thanks i
n
advance, Terry.
----- Original Message -----
*From:* Robin Marks <robin@PaintTheWeb.com>
*To:* rv10-list@matronics.com ; rv-list@matronics.com
*Sent:* Saturday, September 11, 2010 2:03 AM
*Subject:* RV-List: LED Nav Lights
For some time I have mentioned the =93discount=94 way I was going about add
ing
LED Nav lights to my RV-8A build. After having spent $220 on my first set o
f
LED=92s for the -10 (which still required modifications
http://painttheweb.com/painttheweb/rv-10/Lights_LEDHID.aspx ) I decided to
fabricate some Red/Green Nav lights out of Auto parts. The lights were
purchased on eBay for well under $10.00 each. The sockets were maybe $3.00
each and the Red Green Mirrored plexi was about $8.00 delivered. I think
they turned out great. They are definitely brighter than my -10 Nav lights
and many people comment on how noticeable my -10 nav lights are on the
ground and in flight.
Here are a few photos of the Nav lights installed. Note these are older Van
s
wing tips so we had to cut away the corners and replace them with aero tips
.
Photos here:
http://picasaweb.google.com/marks.robin/RV8AN880EE#<http://picasaweb.google
.com/marks.robin/RV8AN880EE>
Robin
RV-4 Sold
RV-6A Sold
RV-10 170 Hours
RV-8A Flying by years end (or else!)
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