PICA 1/5th WACO - Page 5 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 11-25-2015, 02:44 AM   #41
Heliascot
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Re: Waco Pica 1/5 motor mount options


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Thanks Cougar429. Excellent idea with the clear plastic! I will definitely use that.
What did you do with the linkage of the ailerons. Did you use 4 servos or link upper with the lower?
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Old 11-25-2015, 05:55 PM   #42
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Re: Waco Pica 1/5 motor mount options

Ran individual aileron servos on the bottom of the lower wing with the standard interplane linkage to the uppers. Relatively quick to assemble/disassemble at the field. Biggest bit of fun was hogging out the ribs and routing the extensions through where the original wire to the bellcranks were fitted, (again, a lot easier during construction than after the fact). Only way to do that was to use a very long flexible drill.

The bellcranks came out and I fabbed a ply framework to mount the servo plates. Since the paint was relatively brittle took some time to find a fuelproof match.

I did notice the need for slight differential which separate aileron channels can accomodate easily. If you only have one available mounting the servo arms slightly forward with the servo in neutral accomplishes the same thing.
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Old 11-26-2015, 06:48 AM   #43
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Re: Waco Pica 1/5 motor mount options

I've got a build thread on the 1/5th Waco, eliminated the wood rails, should have a pile of pics and description of what was done.
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Old 11-26-2015, 06:49 AM   #44
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Re: Waco Pica 1/5 motor mount options

http://www.rccanada.ca/rccforum/show...ight=Pica+WACO
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Old 11-26-2015, 07:00 AM   #45
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Re: Waco Pica 1/5 motor mount options

Thanks for the link. Helpful to see pics. Did you put servos in both wings for the ailerons or just bottom with linkage to the upper?
Shaun
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Old 11-26-2015, 07:23 AM   #46
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Re: Waco Pica 1/5 motor mount options

Bottoms, links to the uppers.
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Old 11-26-2015, 07:33 AM   #47
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Re: PICA 1/5th WACO

Whatever happened to this project anyway?

Was curious to see how the tank, engine attachment and cowl were installed.
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Old 11-26-2015, 01:41 PM   #48
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Re: Waco Pica 1/5 motor mount options

Quote:
Originally Posted by Cougar429 View Post
......
Having your engine protrude out the cowl is not a problem. In fact this one is the only installation that is not the case, simply due to the fact the cowl is so big. My normal routine is to tape a sheet of clear to the fuselage extending over the engine and use a Sharpie to mark where I need to cut. I then remove the plastic sheeting and cut out what I marked. Re-taping it to the fuse checks if positioning is correct and if any more has to be cut away. Once I have that I unbolt the engine, mount the cowl and fold the clear plastic back over top. Give a perfect cut out every time and much simpler than cardboard.

........
I ran across a pictorial post somewhere on using a small laser to locate openings in the cowl for cylinder heads, needle valves, etc., but can't find the post... so I'll attempt to describe the process in words.

1. mount the engine to the fuselage AND stabilize/secure the fuse to a worktop surface so that the fuselage doesn't move - or can be returned to the exact same position.

2. find a similar STABLE position for a small laser pointer AND position the laser beam so it lands on a marked point on the cylinder head, needle valve, centering prop shaft openings where thrust angles have been changed, etc.

eg. locate the laser on the floor and position the fuselage over the edge of a table. Some small laser pointers come with a flat base or a holder can be fashioned for it.

3. Remove the engine and mount the cowl.... the laser beam will land on the spot on the cowl immediately in line with the marked point on the engine cylinder head.

hope the description is clear enough,
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Old 11-26-2015, 02:13 PM   #49
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That biplane looks great, I've been looking for biplane plans to have a winter build I have so much balsa and plywood that I don't need the full kit. Does anyone would kown where tu find good biplane plans?
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Old 11-27-2015, 03:57 PM   #50
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Re: PICA 1/5th WACO

Clevland Model Plans

http://www.clevelandairline.com/
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