REBEL #652 WING CONST.

bjohnson · Post by **bjohnson** » Fri Feb 17, 2012 5:27 pm

Hi ,Just to break into this quiet period I will ask a question which all have you have answered at one time. In constructing the wing, the two solid ribs-"root" and #4 for gas tank, are very difficult to hold flat due to the forming process. Outside of screwing them to a shaped piece of plywood, does anyone have a suggestion to hold them flat during construction. Also, what is the tank capacity using the standard (3) bay per wing, or should I go larger when using a "O320-160 hp.-Thanks Bob J.

Bob Patterson · Post by **Bob Patterson** » Fri Feb 17, 2012 5:27 pm

I thought the 'root' rib had an extra channel rivetted to it for
stiffness ..... I suppose you could do that temporarily ....
Be sure to use drill rods to align the tank top when installing it -
they keep all that 'wiggly stuff' under control ! :-)

The 'nominal' capacity of the tanks is 44 gal. US - in reality, they
are usually 48 to 50 ! MANY builders go smaller, depending on engine &
mission - 2 bays on left & 3 on right is quite common, and 1 on left &
2 on right is LOTS for Rotax & Subaru applications, depending on trip lengths.

Remember, you are better off to carry extra gas in cans in the back,
& leave it on the dock when you get into the boonies, as insurance for the
trip home. That way, you go in lightly loaded into smaller lakes :-)

When flying with other aircraft (on Rambles), there is NO point in filling
the tanks - you just carry extra weight, and everybody else will have to
stop after 2 - 3 hours anyway ! If you fly around with partially filled
tanks constantly, you have a much greater possibility of getting water from
condensation, or even fuel flow problems, from uncovering an outlet (this
HAS happened !! :-( )

FWIW - the 160 HP version of the O-320 is NOT a preferred choice - you
need 100 LL, no car gas, and there are harmonic problems that can eat props !!
This was discussed at the builders meeting - one solution is an 8 lb. (!)
torsional vibration damper that bolts onto the prop flange before the prop.
One builder now has about 80 hours on this setup - he ate 3 props in under
15 hours before ! ( my recollection's not good - Your Mileage May Vary !) :-)
Also, be very careful of which model number you get - some will NOT fit
standard mounts or cowlings !

.....bobp

---------------------------orig.----------------------------------------------
At 08:03 AM 11/15/99 -0500, you wrote:

Hi ,Just to break into this quiet period I will ask a question which all

have you have answered at one time. In constructing the wing, the two solid
ribs-"root" and #4 for gas tank, are very difficult to hold flat due to the
forming process. Outside of screwing them to a shaped piece of plywood, does
anyone have a suggestion to hold them flat during construction. Also, what
is the tank capacity using the standard (3) bay per wing, or should I go
larger when using a "O320-160 hp.-Thanks Bob J.

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<DIV><FONT color=#000000 size=2>Hi ,Just to break into this quiet period I

will

ask a question which all have you have answered at one time. In

constructing the

wing, the two solid ribs-"root" and #4 for gas tank, are very
difficult to hold flat due to the forming process. Outside of screwing them

to a

shaped piece of plywood, does anyone have a suggestion to hold them flat

during

construction. Also, what is the tank capacity using the standard (3) bay per
wing, or should I go larger when using a "O320-160 hp.-Thanks Bob
J.</FONT></DIV></BODY></HTML>

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