Today's Message Index:
----------------------
1. 02:55 AM - Canopy leaking water (Jim Nolan)
2. 07:25 AM - Re: Longerons (Hopperdhh@AOL.com)
3. 11:09 AM - Re: Longerons (Brooks Wolfe)
4. 11:49 AM - Re: Longerons (vernw@pdq.net)
5. 01:59 PM - SEC: UNCLASSIFIED Re: Canopy leaking water (Francis, David CMDR)
6. 09:45 PM - Re: Longerons (Paul Pflimlin)
Message 1
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| Subject: | Canopy leaking water |
--> RV7-List message posted by: "Jim Nolan" <jamespnolan@earthlink.net>
I've got to order the wing and fuselage part of my RV7 project and I need to
know if Van's has fixed the problem with water leaking in the front seam of
the Tip-UP canopy.
Jim Nolan
N444JN
Message 2
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--> RV7-List message posted by: Hopperdhh@aol.com
In a message dated 3/23/04 10:31:56 PM US Eastern Standard Time,
slipstream13@earthlink.net writes:
>
> --> RV7-List message posted by: "Brooks Wolfe" <slipstream13@earthlink.net>
>
> Does the quickbuild fuselage kit come with preformed longerons? These
> things are pretty frustrating.
>
> When I started the fuselage, the instructions mention as how everything is
> cut so precisely so as to not require jigging -- just put it all together on
> some sawhorses and it must fit. Then, four pages later, these same set of
> instructions are calling for "artistry" and "finesse" in order to get the
> longerons perfect. Argh!
>
> Brooks
>
>
Brooks,
Being an engineer, I had to take the scientifical (my kids accuse me of being
too scientifical) approach. I did a little geometry and trigonometry and
wrote a BASIC program to crunch out some numbers to help me bend the longerons.
Now, if not too many people laugh at me, I'll publish the results here.
What I did was put the longerons in a pretty heavy vise (level) with hardwood
jaw pads that I made up. Then bend and hammer each inch along the length to
be bent (31 inches). After each bend I took 2 crescent wrenches (one on each
flange of the angle) and bent the longeron back to level. You then move the
longeron out of the vise 1 inch and do it again. I think that's what everyone
does. What the numbers gave me is how far the end of the longeron should be
from a straight edge (I used a 6 foot level) held along the unbent portion of
the longeron for each of the 31 bends. Is there any interest in this data?
Dan Hopper (Retired engineer, but still an engineer at heart!)
RV-7A (almost done)
Message 3
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--> RV7-List message posted by: "Brooks Wolfe" <slipstream13@earthlink.net>
Lucky quickbuilders! Er, I mean yeah, what a bunch of pansies! Anyway, I
think I have 'em pretty well figured out -- Just had to vent a bit last
night. I used the technique outlined in the directions, and checked a few
web pages to see if anyone had any brilliant insights (including yours, Dan)
It seems perseverance and patience are the big requirements.
Brooks
do not archive
-------Original Message-------
From: rv7-list@matronics.com
Subject: Re: RV7-List: Longerons
--> RV7-List message posted by: "Dan Checkoway" <dan@rvproject.com>
QB fuselages come mostly riveted already...yeah, the longerons are pre-bent,
pre-drilled (afaik), etc. What wusses! Juuust kidding. 8-)
Just keep at it and you'll get 'em. A little bit at a time. It can take a
LOT of iterations to get 'em perfect. What technique are you using to bend
them?
http://www.rvproject.com/20021001.html (photos and commentary on the
process)
do not archive
)_( Dan
RV-7 N714D
http://www.rvproject.com
----- Original Message -----
From: "Brooks Wolfe" <slipstream13@earthlink.net>
Subject: RV7-List: Longerons
> --> RV7-List message posted by: "Brooks Wolfe"
<slipstream13@earthlink.net>
>
> Does the quickbuild fuselage kit come with preformed longerons? These
> things are pretty frustrating.
>
> When I started the fuselage, the instructions mention as how everything is
> cut so precisely so as to not require jigging -- just put it all together
on
> some sawhorses and it must fit. Then, four pages later, these same set of
> instructions are calling for "artistry" and "finesse" in order to get the
> longerons perfect. Argh!
>
> Brooks
>
>
Message 4
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--> RV7-List message posted by: vernw@pdq.net
What's all these "longerons" everyone's talking about?
Vern
RV7-A QUICKBUILD :-)
> --> RV7-List message posted by: "Brooks Wolfe"
> <slipstream13@earthlink.net>
>
>
> Lucky quickbuilders! Er, I mean yeah, what a bunch of pansies! Anyway,
> I
> think I have 'em pretty well figured out -- Just had to vent a bit last
> night. I used the technique outlined in the directions, and checked a few
> web pages to see if anyone had any brilliant insights (including yours,
> Dan)
> It seems perseverance and patience are the big requirements.
>
> Brooks
> do not archive
>
> -------Original Message-------
>
> From: rv7-list@matronics.com
> Date: 03/23/04 20:00:42
> To: rv7-list@matronics.com
> Subject: Re: RV7-List: Longerons
>
> --> RV7-List message posted by: "Dan Checkoway" <dan@rvproject.com>
>
> QB fuselages come mostly riveted already...yeah, the longerons are
> pre-bent,
> pre-drilled (afaik), etc. What wusses! Juuust kidding. 8-)
>
> Just keep at it and you'll get 'em. A little bit at a time. It can take
> a
> LOT of iterations to get 'em perfect. What technique are you using to
> bend
> them?
>
> http://www.rvproject.com/20021001.html (photos and commentary on the
> process)
>
> do not archive
> )_( Dan
> RV-7 N714D
> http://www.rvproject.com
>
> ----- Original Message -----
> From: "Brooks Wolfe" <slipstream13@earthlink.net>
> To: <rv7-list@matronics.com>
> Subject: RV7-List: Longerons
>
>
>> --> RV7-List message posted by: "Brooks Wolfe"
> <slipstream13@earthlink.net>
>>
>> Does the quickbuild fuselage kit come with preformed longerons? These
>> things are pretty frustrating.
>>
>> When I started the fuselage, the instructions mention as how everything
>> is
>> cut so precisely so as to not require jigging -- just put it all
>> together
> on
>> some sawhorses and it must fit. Then, four pages later, these same set
>> of
>> instructions are calling for "artistry" and "finesse" in order to get
>> the
>> longerons perfect. Argh!
>>
>> Brooks
>>
>>
>
>
Message 5
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| Subject: | Canopy leaking water |
--> RV7-List message posted by: "Francis, David CMDR" <David.Francis@defence.gov.au>
Jim,
The Vans design is unchanged. However I am aware of two successful fixes.
Instead of using layers of fibreglass mat on the front seam, use fibreglass
slurry with shredded threads in it. Its like spreading cement, you get it
from oat builder suppliers. Also you can use automotive windscreen adhesive.
I will be using Sikaflex 295 plus its specialised primers. That stuff can
stick a wet bum to a slipperydip.
See the article in the last edition of the EAA magazine, look for the
article by the South African builder Chalkie Stobbart.
Regards,
David Francis, VH-ZEE, Canberra, Australia.
-----Original Message-----
From: Jim Nolan [mailto:jamespnolan@earthlink.net]
Subject: RV7-List: Canopy leaking water
--> RV7-List message posted by: "Jim Nolan" <jamespnolan@earthlink.net>
I've got to order the wing and fuselage part of my RV7 project and I need to
know if Van's has fixed the problem with water leaking in the front seam of
the Tip-UP canopy.
Jim Nolan
N444JN
Message 6
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--> RV7-List message posted by: "Paul Pflimlin" <pablo@phonewave.net>
----- Original Message -----
From: <Hopperdhh@AOL.com>
Subject: Re: RV7-List: Longerons
Since I hope to be bending my longerons sometime this summer, I would be
most happy to obtain any specs. that would facilitate the process. \Paul,
RV-7A
> --> RV7-List message posted by: Hopperdhh@aol.com
>
> In a message dated 3/23/04 10:31:56 PM US Eastern Standard Time,
> slipstream13@earthlink.net writes:
>
> >
> > --> RV7-List message posted by: "Brooks Wolfe"
<slipstream13@earthlink.net>
> >
> > Does the quickbuild fuselage kit come with preformed longerons? These
> > things are pretty frustrating.
> >
> > When I started the fuselage, the instructions mention as how everything
is
> > cut so precisely so as to not require jigging -- just put it all
together on
> > some sawhorses and it must fit. Then, four pages later, these same set
of
> > instructions are calling for "artistry" and "finesse" in order to get
the
> > longerons perfect. Argh!
> >
> > Brooks
> >
> >
>
> Brooks,
>
> Being an engineer, I had to take the scientifical (my kids accuse me of
being
> too scientifical) approach. I did a little geometry and trigonometry and
> wrote a BASIC program to crunch out some numbers to help me bend the
longerons.
> Now, if not too many people laugh at me, I'll publish the results here.
>
> What I did was put the longerons in a pretty heavy vise (level) with
hardwood
> jaw pads that I made up. Then bend and hammer each inch along the length
to
> be bent (31 inches). After each bend I took 2 crescent wrenches (one on
each
> flange of the angle) and bent the longeron back to level. You then move
the
> longeron out of the vise 1 inch and do it again. I think that's what
everyone
> does. What the numbers gave me is how far the end of the longeron should
be
> from a straight edge (I used a 6 foot level) held along the unbent portion
of
> the longeron for each of the 31 bends. Is there any interest in this
data?
>
> Dan Hopper (Retired engineer, but still an engineer at heart!)
>
> RV-7A (almost done)
>
>
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