My .002 cents (you may get that one Wayne:)on Wayne's comments:
Extended wing: Who is "ART"? If extend wing 6 inch and use current tip or
similar you are at approximately the same span as the new MAM tip, assuming
Daryl ran some numbers??
Flutter: I am doubtful the lack of flutter in the MAM design is due to stiff
controls. I agree though that stiffness can dampen the tendency.
Quote from Tony B.
"Avoid free play or slack in the control cables. Stiffness in the control
system does have a useful damping effect on the control surfaces further
inhibiting flutter tendencies. However, this should not be completely relied
upon as later, in service, the wear and occasional lubrication could free
the system of much of its original friction and result in an increased risk
of flutter." Do the delrin bearings ever wear in??
In our (all MAM type) planes I suspect sloppy trim tabs would be the most
likely cause of flutter.
Fuel: Your talking about an electric boost pump right, not the engine driven
pump? Many of the Piper high wings run fore and aft ports with no header
tank and no ill effect. I know of at least one SR with fore and aft pickups
with a 540 lyc (not sure if IO or O-540). As I mentioned I went the header
tank route, one on each side, single original pick up port. Another flying
Moose went with one large header tank in the floor with dual pickups.
Scott
-----Original Message-----
From:
mike.davis@dcsol.com [mailto:
mike.davis@dcsol.com] On Behalf Of Wayne
G. O'Shea
Sent: Monday, September 13, 2004 4:25 PM
To:
rebel-builders@dcsol.com
Subject: Re: SR/Moose wings wanted/ordering options
Here's my two cents in Scott's message in CAPS. Wayne
----- Original Message -----
From: "Scott Aldrich" <
sa@mwutah.com>
To: <
rebel-builders@dcsol.com>
Sent: Monday, September 13, 2004 6:03 PM
Subject: RE: SR/Moose wings wanted/ordering options
Brad,
While I am waiting for some primer to dry, here is some more FWIW info.
If I was building my wing from parts I would add full length cross vent
tube
from high point in outboard corner to outboard corner(added this to FB
wing). GREAT IDEA DON'T FORGET THE TEE AND A RAM AIR TUBE IN ONE ROOT
FAIRING!
Add fuel caps with filler necks in the third bay out. This way if you ever
go on floats it is much easier fueling (can reach it from the step). Even
with the 120 gallon tanks you can almost get it full due to the filler
neck
height. With 5 bays out you may not even need the fuel filler in the
outboard bay. We have the flush in the outboard and regular in bay 3.
GREAT TO HAVE THAT "HAND HOLD" CAP AS EASY REACH WITH JERRY CAN AND?OR
HOSE AS SCOTT POINTS OUT
Either install the sealed nut plates to hold the aileron and flap hinge
brackets or the very least don't follow the plans and put the nuts inside
the tanks were you will never be able to see if they have fallen off, put
nuts on outside.
I STILL HAVE ONE LUG ANCHOR NUTS AVAILABLE IF ANYONE NEEDS THEM TO
FACILITATE AILERON/FLAP HINGE REMOVAL/REPLACEMENT AFTER THE TANKS ARE CLOSED
Add an aileron trim servo.
PROBABLY A GOOD IDEA...BUT FLEW A C182 FOR YEARS THAT HAD AUTOPILOT AND
NEVER< TURNED IT ON!
I would make or buy an extra rib and extend the wing at least 6 inches,
maybe a whole bay.
DONE A STRESS ANALYSIS ON THAT WHOLE BAY? "ART" MISSED IT ON SOME EARLIER
CESSNAS AND BROKE WING SPARES WITH THEIR EXTENSIONS!
Install actual bearings around the aileron torque tubes at the butt rib
(Some are installing bearing there and at the control torque tube in the
floor, makes for very easy/smooth controls - mine are not this way but I
have "played" with ones that are).
NOT SURE ABOUT THIS ONE! BEARINGS TO MAINTAIN/SEIZE/ETC VS A LIFETIME DELRIN
BEARING.....AND FRICTION >IS< A GOOD THING IN THE CONTROLS TO PREVENT
FLUTTER!!
Possibly move the fuel pick port on the butt rib back to the aft corner
and
add one near the front and tie them together al la Cessna (didn't do this
but added header tanks on each side). With the current port location,
about
11 inches forward of aft corner, and the extra long tanks you can get
considerable amount of fuel behind the port during a go around. No one
has
had any problems with stock that we know of though, I just didn't like it.
RUNNING A FUEL PUMP????? DO NOT, I REPEAT..DO NOT HAVE TWO OUTLETS IN THE
TANK (without a header tank) AS IF YOU "UNCORK" ONE THE PUMP WILL DO THE
EASIEST WHICH IS TO SUCK THE AIR AND CAVITATE IF UNDER HIGH POWER SETTING
WHEN IT HAPPENS!
Probably more, but primer is dry so back to work.
I'LL SHUT UP NOW AS WELL !
))) WAYNE
Scott
Moose 174
-----------------------------------------------------------------
List archives located at:
https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe:
rebel-builders-unsubscribe@dcsol.com
List administrator:
mike.davis@dcsol.com
-----------------------------------------------------------------