Today's Message Index:
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1. 04:56 PM - Twist Avoidance (Perry Delano)
2. 07:16 PM - Re: Twist Avoidance (MacDonald Doug)
3. 07:19 PM - Re: Twist Avoidance (JohnDRead@aol.com)
4. 07:30 PM - Re: Twist Avoidance (Carlos Sa)
Message 1
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The 12' X 2.5' work bench I use to build on is a very stiff structure on
casters. It has some twist in it that would be a big job to take out if not
impossible. In the past I have jacked the table then shimmed 2x2 Aluminum
tubing laid perpendicular the long axis of the table to have level supports
on which to build. The latter is a cumbersome procedure and is exaggerated
by a sloping garage floor. I did weld up some screw jack levelers for the
table that hold it steady and get it near level but I still need to address
the twist. I have flipped the R wing, right side up and want to drill and
cleco the nose skin and leading edge of the upper rear skin to the spar but
I want to ensure the 2x2's are level in the X and Y before starting.
I fear a 4 foot level is not accurate enough as I would have to either
attach it to a longer "straight beam" or level in increments along the
length of the table. I have thought about buying or renting one of those
self leveling lasers, using an optical level and even a piece of clear tube
filled with water or some other fluid. I may be over thinking this for a
CH-701, so I wanted to see what others have done to ensure they are
building on a level surface.
Regards,
Perry Delano
Message 2
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| Subject: | Re: Twist Avoidance |
I don't know what to tell you Perry other than the flatter and truer=C2-t
he work surface, the better the final product will be.=C2- I would to my
best to eliminate the twist as much as possible.=C2- Now, are we talking
a millimeter or two or are we talking 10-20mm.=C2- If the former is what
you have, your good to go.=C2- If its the latter, you need to get the ben
ch straightened out.=C2- Remember to check your construction standards on
the Manual CD, it generally tells you the limits for how accurate things n
eed to be.=0A=C2-=0AHope this helps=0A=C2-=0ADoug M=0A =0A=0A__________
______________________=0A From: Perry Delano <pdelano@telus.net>=0ATo: zeni
th701801-list@matronics.com =0ASent: Friday, September 27, 2013 6:55:50 PM
=0ASubject: Zenith701801-List: Twist Avoidance=0A =0A=0A=0AThe 12
=99 X 2.5=99 work bench I use to build on is a very stiff structure o
n casters. It has some twist in it that would be a big job to take out if n
ot impossible. In the past I have jacked the table then shimmed 2x2 Aluminu
m tubing laid perpendicular the long axis of the table to have level suppor
ts on which to build. The latter is a cumbersome procedure and is exaggerat
ed by a sloping garage floor. I did weld up some screw jack levelers for th
e table that hold it steady and get it near level but I still need to addre
ss the twist. I have flipped the R wing, right side up and want to drill an
d cleco the nose skin and leading edge of the upper rear skin to the spar b
ut I want to ensure the 2x2=99s are level in the X and Y before start
ing. =0A=C2-=0AI fear a 4 foot level is not accurate enough as I would ha
ve to either attach it to a longer =9Cstraight beam=9D or level
in increments along the length of the table. I have thought about buying o
r renting one of those self leveling lasers, using an optical level and eve
n a piece of clear tube filled with water or some other fluid. =C2-I may
be over thinking this for a CH-701, =C2-so I wanted to see what others ha
ve done to ensure they are building on a level surface.=0A=C2-=0ARegards,
====
Message 3
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| Subject: | Re: Twist Avoidance |
Perry,
The more flat your building table is the less problems you will
have when you fly your 701. There is some guidance in the Zenith building
standards, I recall it was one degree max.
Regards, John
CH701 - Colorado - Jabiru 3300
Cell: 719-494-4567
Home: 303-648-3261
In a message dated 9/27/2013 5:56:50 P.M. Mountain Daylight Time,
pdelano@telus.net writes:
The 12=99 X 2.5=99 work bench I use to build on is a very stiff
structure on
casters. It has some twist in it that would be a big job to take out if no
t
impossible. In the past I have jacked the table then shimmed 2x2 Aluminum
tubing laid perpendicular the long axis of the table to have level support
s
on which to build. The latter is a cumbersome procedure and is exaggerated
by a sloping garage floor. I did weld up some screw jack levelers for the
table that hold it steady and get it near level but I still need to addres
s
the twist. I have flipped the R wing, right side up and want to drill and
cleco the nose skin and leading edge of the upper rear skin to the spar bu
t
I want to ensure the 2x2=99s are level in the X and Y before starting
.
I fear a 4 foot level is not accurate enough as I would have to either
attach it to a longer =9Cstraight beam=9D or level in increment
s along the length
of the table. I have thought about buying or renting one of those self
leveling lasers, using an optical level and even a piece of clear tube fil
led
with water or some other fluid. I may be over thinking this for a CH-701,
so I wanted to see what others have done to ensure they are building on a
level surface.
Regards,
Perry Delano
Message 4
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| Subject: | Re: Twist Avoidance |
I used a clear hose with water to rig my CH601 fuselage.
I also used an old fashioned bubble level for smaller stuff.
I have a laser level, but haven't had much success with it (possibly
because it isn't a top quality device)
Carlos
CH601-HD, plans
On Friday, September 27, 2013, Perry Delano wrote:
> The 12=92 X 2.5=92 work bench I use to build on is a very stiff structure
on
> casters. It has some twist in it that would be a big job to take out if n
ot
> impossible. In the past I have jacked the table then shimmed 2x2 Aluminum
> tubing laid perpendicular the long axis of the table to have level suppor
ts
> on which to build. The latter is a cumbersome procedure and is exaggerate
d
> by a sloping garage floor. I did weld up some screw jack levelers for the
> table that hold it steady and get it near level but I still need to addre
ss
> the twist. I have flipped the R wing, right side up and want to drill and
> cleco the nose skin and leading edge of the upper rear skin to the spar b
ut
> I want to ensure the 2x2=92s are level in the X and Y before starting. **
**
>
> ** **
>
> I fear a 4 foot level is not accurate enough as I would have to either
> attach it to a longer =93straight beam=94 or level in increments along th
e
> length of the table. I have thought about buying or renting one of those
> self leveling lasers, using an optical level and even a piece of clear tu
be
> filled with water or some other fluid. I may be over thinking this for a
> CH-701, so I wanted to see what others have done to ensure they are
> building on a level surface.****
>
> ** **
>
> Regards,****
>
> ** **
>
> Perry Delano****
>
> ** **
>
> *
>
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