[rebel-builders] cabin floor Fus-39 and Fus-40 to bulkheads

[Ken]

Hi Ben
I had the older manual at the time but I do recall having the entire
bottom and side skins rivetted and the fuselage on the wheels before
doing any of the inside extra floor channels so I think you are OK to
rivet the exterior skins if you want up to but not at the cage. I wish I
had dimpled all the rivets above below and behind the doors though as
the door flanges rub on those rivets in flight.

I see a note after Figure 12.31.4 in the newer manual about not
rivetting Fus-40 if using spring gear. Definately don't rivet the
interior floor until you have planned any plumbing and wiring conduits
that you might want and positioned the seat rails and seat belts and
reinforced the float attachment brackets. Might even want to wait til
the control columns are positioned. 1'" rivet pitch sounds about right
but I don't really remember.

Ken

bransom@dcsol.com wrote:

I've been on the forward fuselage, a bit sporadically (sigh). I've only
clecoed so far -- no rivits -- and have sides (Fus 24, 25, 26), root ribs
(Fus-27) clecoed to bulkheads and/or carry-throughs Fus-3,4. It's time to
put in some rivets. But in all this and looking ahead I can't see anything
on where the bottom skins get drilled or riveted to the bulkheads forward
of Bulkhead F. Is that supposed to be done in the brief (1 page, section
12.15) general description of the double floor install? At least at this
point is it fine to drill and rivet the bottom but stopping short of the
Fus-5 carry-through?

I'm assuming to use a 1" rivet pitch along the floor skins (39 and40) into
the bulkheads. ?

Thanks in adv,
-Ben, 496R

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[bransom]

Thanks Ken. I'm going to read ahead again to see if I can find what MAM
says about riveting the outside bottom skins to the cage area. (I meant
"cage area" -- the square bulkheads and up to the carry-through) when
asking about riveting the outside bottom skins Fus-39 and Fus-40. I'm
not even there yet with the inside floor of this area.

How far above, below and behind the doors do you suggest dimpling -- just
the first couple rivets in any of those directions?
-Ben

Hi Ben
I had the older manual at the time but I do recall having the entire
bottom and side skins rivetted and the fuselage on the wheels before
doing any of the inside extra floor channels so I think you are OK to
rivet the exterior skins if you want up to but not at the cage. I wish I
had dimpled all the rivets above below and behind the doors though as
the door flanges rub on those rivets in flight.

I see a note after Figure 12.31.4 in the newer manual about not
rivetting Fus-40 if using spring gear. Definately don't rivet the
interior floor until you have planned any plumbing and wiring conduits
that you might want and positioned the seat rails and seat belts and
reinforced the float attachment brackets. Might even want to wait til
the control columns are positioned. 1'" rivet pitch sounds about right
but I don't really remember.

Ken

bransom@dcsol.com wrote:

I've been on the forward fuselage, a bit sporadically (sigh). I've only
clecoed so far -- no rivits -- and have sides (Fus 24, 25, 26), root ribs
(Fus-27) clecoed to bulkheads and/or carry-throughs Fus-3,4. It's time to
put in some rivets. But in all this and looking ahead I can't see anything
on where the bottom skins get drilled or riveted to the bulkheads forward
of Bulkhead F. Is that supposed to be done in the brief (1 page, section
12.15) general description of the double floor install? At least at this
point is it fine to drill and rivet the bottom but stopping short of the
Fus-5 carry-through?

I'm assuming to use a 1" rivet pitch along the floor skins (39 and40) into
the bulkheads. ?

Thanks in adv,
-Ben, 496R

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[Drew Dalgleish]

Hi Ben Dimpling around the doors sounds like a great idea. It should make
for a tighter fitting door. I'm going to need to replace some rivets on my
plane before much longer as the door is wearing the heads down.Probably
only the first rivet is needed but just hold up the doorskin to the
fuselage to see how far it covers.

At 08:09 PM 12/9/2007 -0900, you wrote:

Thanks Ken. I'm going to read ahead again to see if I can find what MAM
says about riveting the outside bottom skins to the cage area. (I meant
"cage area" -- the square bulkheads and up to the carry-through) when
asking about riveting the outside bottom skins Fus-39 and Fus-40. I'm
not even there yet with the inside floor of this area.

How far above, below and behind the doors do you suggest dimpling -- just
the first couple rivets in any of those directions?
-Ben

Hi Ben
I had the older manual at the time but I do recall having the entire
bottom and side skins rivetted and the fuselage on the wheels before
doing any of the inside extra floor channels so I think you are OK to
rivet the exterior skins if you want up to but not at the cage. I wish I
had dimpled all the rivets above below and behind the doors though as
the door flanges rub on those rivets in flight.

I see a note after Figure 12.31.4 in the newer manual about not
rivetting Fus-40 if using spring gear. Definately don't rivet the
interior floor until you have planned any plumbing and wiring conduits
that you might want and positioned the seat rails and seat belts and
reinforced the float attachment brackets. Might even want to wait til
the control columns are positioned. 1'" rivet pitch sounds about right
but I don't really remember.

Ken

bransom@dcsol.com wrote:

I've been on the forward fuselage, a bit sporadically (sigh). I've only
clecoed so far -- no rivits -- and have sides (Fus 24, 25, 26), root ribs
(Fus-27) clecoed to bulkheads and/or carry-throughs Fus-3,4. It's time to
put in some rivets. But in all this and looking ahead I can't see

anything

on where the bottom skins get drilled or riveted to the bulkheads forward
of Bulkhead F. Is that supposed to be done in the brief (1 page, section
12.15) general description of the double floor install? At least at this
point is it fine to drill and rivet the bottom but stopping short of the
Fus-5 carry-through?

I'm assuming to use a 1" rivet pitch along the floor skins (39 and40) into
the bulkheads. ?

Thanks in adv,
-Ben, 496R

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Drew



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[bransom]

I (and others, I'm sure) have done some dimpling to finished (joined) skins
and the flush rivet goes in almost as good as skins dimpled individually.
Depends on skin thicknesses of course and that .032 sill plus doubled
Fus-26 is too much. It will be awhile before I have a door to hold up to
the side! :) ...so I'll just look at some pictures and dimple the first
one in.

BTW, it is amazing how often if I'm on the fence about asking a clarifying
question here that I get some additional answer back for an improvement
such as this one. Moral: Ask! Thanks, all,
-Ben

Hi Ben Dimpling around the doors sounds like a great idea. It should make
for a tighter fitting door. I'm going to need to replace some rivets on my
plane before much longer as the door is wearing the heads down.Probably
only the first rivet is needed but just hold up the doorskin to the
fuselage to see how far it covers.

At 08:09 PM 12/9/2007 -0900, you wrote:

Thanks Ken. I'm going to read ahead again to see if I can find what MAM
says about riveting the outside bottom skins to the cage area. (I meant
"cage area" -- the square bulkheads and up to the carry-through) when
asking about riveting the outside bottom skins Fus-39 and Fus-40. I'm
not even there yet with the inside floor of this area.

How far above, below and behind the doors do you suggest dimpling -- just
the first couple rivets in any of those directions?
-Ben

Hi Ben
I had the older manual at the time but I do recall having the entire
bottom and side skins rivetted and the fuselage on the wheels before
doing any of the inside extra floor channels so I think you are OK to
rivet the exterior skins if you want up to but not at the cage. I wish I
had dimpled all the rivets above below and behind the doors though as
the door flanges rub on those rivets in flight.

I see a note after Figure 12.31.4 in the newer manual about not
rivetting Fus-40 if using spring gear. Definately don't rivet the
interior floor until you have planned any plumbing and wiring conduits
that you might want and positioned the seat rails and seat belts and
reinforced the float attachment brackets. Might even want to wait til
the control columns are positioned. 1'" rivet pitch sounds about right
but I don't really remember.

Ken

bransom@dcsol.com wrote:

time to

anything

into

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Drew

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[Ken]

Ben
Suspect this has been answered but the door flange doesn't overlap more
than about 3/4" so dimpling just the closest rivet to the door (if it is
closer than 3/4") should do it.

Bob
Yes the leather is a good idea although not sure how it will be when wet
and frozen. I have not found 1/16" weatherstripping anywhere though.
Well actually I have but it has adhesive on both sides...

Ken

bransom@dcsol.com wrote:

Thanks Ken. I'm going to read ahead again to see if I can find what MAM
says about riveting the outside bottom skins to the cage area. (I meant
"cage area" -- the square bulkheads and up to the carry-through) when
asking about riveting the outside bottom skins Fus-39 and Fus-40. I'm
not even there yet with the inside floor of this area.

How far above, below and behind the doors do you suggest dimpling -- just
the first couple rivets in any of those directions?
-Ben

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