Today's Message Index:
----------------------
1. 06:36 AM - flaps (Frazier, Vincent A)
2. 10:07 AM - Re: Rocket wing alignment (Frazier, Vincent A)
3. 09:47 PM - Re: flaps (Wernerworld)
Message 1
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--> Rocket-List message posted by: "Frazier, Vincent A" <VFrazier@usi.edu>
Russ,
Sell it or start pulling your hair out. This is one of those areas
where you need to have everything together before you can put anything
together. A real Catch 22.
Van himself explained to me how to get this area right (on the RV-4
anyway). This was way back in the late '80's when he could still talk
to people without a freakin' mob surrounding him.
He said to build the fuselage bulkheads to fit the wings. Ignore the
incidence measurements as you can adjust the tail later.
I'll bet it's waaaay too late to do that for you. Then mount the flap,
then aileron, then wingtip....carefully checking the trailing edge
alignment, no twist, everything perfectly level and straight as you
proceed. I've done this twice now and it works fine, albeit a bit
tedius.
You can spend weeks.... months..... a lifetime screwing around with
this. Then Van confessed that it'll fly just as good if you just slam
it all together and adjust the trim later.
I can't offer advice with the fit of Mark's fairings. They do look
very, very nice, but I went with the flat wrap aluminum fairings because
they're dirt cheap, easy, and (mostly) good enough for Dave Ander's and
other super speedsters. It would be very interesting for someone to do
a speed comparison between the two fairings.
Ow... my head hurts.....soooo confused. YMMV!
Vince Frazier
F-1H Rocket, N540VF
http://www.usi.edu/science/chemistry/vfrazier/page1.html
Message 2
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| Subject: | RE: Rocket wing alignment |
--> Rocket-List message posted by: "Frazier, Vincent A" <VFrazier@usi.edu>
James,
You can call me if you like, 812-464-1839, but I'll give it a quick
explanation to start.
After you get your wings done you can build the center fuselage
framework on the wings. Not the entire fuselage, just the F404
bulkhead, floor ribs, and rear spar carry thru. Not the skins, just
the frame.
You can do one wing at a time (easier, but a bit more variable) or put
the wings together using the F-404 and splice plates... just like it
will be on the plane.
Of course, you'll want to set the wings on some sturdy sawhorses or
similar and get them leveled up so both wings are at the same incidence.
Then build the floor ribs and rear spar carry thru in place on the
wings. That way you are POSITIVE they will all fit together. You don't
have to drill the rear spar/rear spar carry thru bolt yet. You can do
that later.
(Or a slightly different order, if you are confident that you understand
the desired product, you can double check all the wing sweep and
incidence and go ahead and drill an 1/8" hole in the wing rear spars and
carrythru bulkhead. You can enlarge the hole later after your 100%
sure everything is right on. Then put all of the floor ribs in. Your
wing incidence/sweep will be done. Or you can do it later and fight a
fuselage that bounces around on its landing gear unless you figure out
how to jack it up on some sort of fixture.)
Here's the important part: While putting the floor ribs/rear spar
together, match the belly skin (no, it's not installed... just imaginary
right now) to the wing skins so that you have a nice smooth transition.
If you have your wing template, match it up with the floor ribs behind
the rear spar... so that the flaps will also match nicely.
Notice that I didn't say anything about measuring the wing incidence
anywhere, except for making sure that both wings are the same. It's not
important right now. You can adjust the tail later. I've got details
of how I did that on my website
http://www.usi.edu/science/chemistry/vfrazier/finishing.htm.
The reason I did all of this and the reason I talked to Van in the first
place was that 90% of all the RVs at Osh back in the 80's had a grossly
mismatched flap/fuselage joint. Quite often the flap skins were bent
dramatically to match the fuselage... yuck.
This worked for me...YMMV,
Vince
_____
From: jamesbaldwin@attglobal.net [mailto:jamesbaldwin@attglobal.net]
Subject: Rocket wing alignment
Vince -
snip
Van himself explained to me how to get this area right (on the RV-4
anyway). This was way back in the late '80's when he could still talk
to people without a freakin' mob surrounding him.
He said to build the fuselage bulkheads to fit the wings. Ignore the
incidence measurements as you can adjust the tail later.
Would you mind elaborating on this a bit for me. You said it worked for
you and that's right where I am in the construction process. I'm not
sure what I do to build them to "fit the wings." I am ready to rivet
the 404 bulkhead together. If an email discussion is too lengthy, say
so and I'll call you. Thank you. JBB
Message 3
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--> Rocket-List message posted by: "Wernerworld" <russ@wernerworld.com>
Vince,
Thanks for the tips. As it turns out, I had clecoed my tips on based on
having the ailerons set properly. I can't even remember what the heck I set
them to, but they were way low. I checked the flap with the bottom skin
flush with the fuse bottom and it was perfect on the wing. I set the
ailerons to match and now need to re drill the tips (easy). Problem
solved.My flap skins now rest flat on the fuse bottom and all is well!
I'd use your first idea (pull out my hair) but you obviously don't know my
hair. There ain't enough to solve anything!
As for the fiberglass fairings, they will fit fine with a bit of trimming.
Normal stuff......fits great after you make it fit great!
Russ
----- Original Message -----
From: "Frazier, Vincent A" <VFrazier@usi.edu>
Subject: Rocket-List: flaps
> --> Rocket-List message posted by: "Frazier, Vincent A" <VFrazier@usi.edu>
>
> Russ,
>
> Sell it or start pulling your hair out. This is one of those areas
> where you need to have everything together before you can put anything
> together. A real Catch 22.
>
> Van himself explained to me how to get this area right (on the RV-4
> anyway). This was way back in the late '80's when he could still talk
> to people without a freakin' mob surrounding him.
>
> He said to build the fuselage bulkheads to fit the wings. Ignore the
> incidence measurements as you can adjust the tail later.
>
> I'll bet it's waaaay too late to do that for you. Then mount the flap,
> then aileron, then wingtip....carefully checking the trailing edge
> alignment, no twist, everything perfectly level and straight as you
> proceed. I've done this twice now and it works fine, albeit a bit
> tedius.
>
> You can spend weeks.... months..... a lifetime screwing around with
> this. Then Van confessed that it'll fly just as good if you just slam
> it all together and adjust the trim later.
>
> I can't offer advice with the fit of Mark's fairings. They do look
> very, very nice, but I went with the flat wrap aluminum fairings because
> they're dirt cheap, easy, and (mostly) good enough for Dave Ander's and
> other super speedsters. It would be very interesting for someone to do
> a speed comparison between the two fairings.
>
>
> Ow... my head hurts.....soooo confused. YMMV!
>
>
> Vince Frazier
> F-1H Rocket, N540VF
> http://www.usi.edu/science/chemistry/vfrazier/page1.html
>
>
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