RE: RE: RE: FOCUS II ARF construction by-the-numbers  
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RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/13/2004 7:47:09 PM   
Pro pattern



Posts: 354
Joined: 4/19/2003
From: Savaneta, ARUBA
Status: offline 		Like I have promise here are the pic's.

You'll see way I sad that (PATTERN FREAK )Gregory Winklaar did a excellent job.


Danny Koolman

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       Post #: 76

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/14/2004 5:28:17 PM   
Don Szczur



Posts: 944
Joined: 1/6/2002
From: Chantilly, VA, USA
Status: offline 		Tailwheel assembly.

This was very simple, but important to mount correctly to avoid binding with the rudder. The technique I used (similar to that which Dave Guerin did on my last focus) after staring at it for a few days, and after finding a couple of steel wheel collars, included:

1. Slipping the wire through the tailwheel bracket and clipping the wire about flush with the top of the bracket.
2. Clipping the bushing part end off (just after the hole) and slipping it on the top of the tailwheel bracket
3. Putting in the wheel collar (I used a standard 3/32 wheel collar with a 4x40 socket head screw). File a flat notch where the screw meets the wire.
4. mount the wheel and put another 3/32 wheel collar to hold the wheel on. (File a flat where the wheel collar screw fits in there as well).
5. Align the tailwheel assembly so its straight front to back and the wire/wheel collar/bushing center are smack center of the rudder hinge line. Mark two holes and drill 1/16 holes, screw in with two of the supplied #4 screws.
6. align the tailwheel so its straight with the rudder, and then mark the hole of the bushing where it goes into the rudder. Move the tailwheel over, drill a 1/16 hole and then move the bushing tab over and screw in in the hole with another of the supplied #4 screws.
7. Take two steps back and wonder why it took three evenings to mount something so simple.

(in reply to Pro pattern)
       Post #: 77

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/15/2004 4:45:49 AM   
Eric.Henderson



Posts: 1381
Joined: 9/10/2003
From: Mt Laurel, NJ, USA
Status: offline 		How's this hybrid? Central hobbies mixed with a Sullivan.

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       Post #: 78

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/16/2004 2:20:05 AM   
Pro pattern



Posts: 354
Joined: 4/19/2003
From: Savaneta, ARUBA
Status: offline 		Hello Don,

I was wondering where precisely did you put the elevator servo? ( measurements )
And with this set-up, did you use the full length of the carbon-fiber pushrod?


Your info will be appreciated.

Danny

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       Post #: 79

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/17/2004 2:13:38 AM   
Don Szczur



Posts: 944
Joined: 1/6/2002
From: Chantilly, VA, USA
Status: offline 		Hello- I used the full length pushrod, with about 1 inch or so removed. Attached is diagram, viewed from the fuselage bottom.

Cheers!

Don

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       Post #: 80

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/17/2004 2:19:08 AM   
Pro pattern



Posts: 354
Joined: 4/19/2003
From: Savaneta, ARUBA
Status: offline 		Thanks a lot Don,

Danny

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       Post #: 81

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/17/2004 2:46:42 AM   
Pro pattern



Posts: 354
Joined: 4/19/2003
From: Savaneta, ARUBA
Status: offline 		And also when did you cut (remove) this 1” peace, before or after clueing on the Y
connector for the elevator pushrod. ( before or after you assemble the elevator pushrod
as you shown in post Nr. 46 pic )

Again, Thanks

Danny

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       Post #: 82

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/18/2004 4:19:21 AM   
Don Szczur



Posts: 944
Joined: 1/6/2002
From: Chantilly, VA, USA
Status: offline 		Danny,

After doing the steps in post #46. I think it was about an inch or so. I remember thinking that it would not be long enough to mount the servos in the front bay (canopy access) area, so that's why I put the servos from the under-side rear bay. Here were the steps I took: I had everything mounted (servos, pushrod, linkages in the back) and then screwed the clevis on the titanium pushrod end, centered the elevator and servo, and eye-balled the length by holding the Ti/clevis assembly next to the pushrod (marked it) then cut the CF with a dremel.

After putting some thick CA on the Ti end and inserting it into the CF pushrod end, I secured the pushrod to the servo.

Don

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       Post #: 83

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/18/2004 5:04:20 AM   
Eric.Henderson



Posts: 1381
Joined: 9/10/2003
From: Mt Laurel, NJ, USA
Status: offline 		Don,
I would reccomend using JB weld to hold in the pushrod end. Been doing this for several years with zero failures..

My Focus-2 is about a week of evenings away from being flyable. Need some parts at the WRAM show.

Will be gluing my belly pan into a groove cut into opening

Using OS 1.60RFX with pump...

Nite

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       Post #: 84

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/20/2004 6:56:53 PM   
rodney tanner


 

Posts: 204
Joined: 1/29/2004
From: La HerraduraEdo. de Mexico, MEXICO
Status: offline 		Eric,
Is the pump the OS 140RX part or an aftermarket graft?
Regards

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Rodney

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       Post #: 85

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/22/2004 5:53:03 AM   
Eric.Henderson



Posts: 1381
Joined: 9/10/2003
From: Mt Laurel, NJ, USA
Status: offline 		Sherline lathe and mill adaptation. Not a standard product.

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       Post #: 86

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/22/2004 8:24:42 AM   
Doug Cronkhite


 

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Joined: 12/20/2001
From: San Diego, CA, USA
Status: offline
quote:

ORIGINAL: Eric.Henderson

Will be gluing my belly pan into a groove cut into opening



What does this mean Eric? Did you cut a groove around the entire belly opening to slot the pan into?

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Doug Cronkhite

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       Post #: 87

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/23/2004 1:53:06 AM   
Eric.Henderson



Posts: 1381
Joined: 9/10/2003
From: Mt Laurel, NJ, USA
Status: offline 		Almost Doug.

I cut a piece off the front as far back as the landing gear. Then I cut a groove about 1/8" down for the rest of the belly pan. I also recess the front section by peeling back the covering. Cutting away 1/16" deep to match the belly pan. The rear section will be glued in place.

I'll post some pic's when I get a chance.

Regards,

Eric.

Fresh back from the WRAM show.

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RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/23/2004 4:20:54 AM   
Eric.Henderson



Posts: 1381
Joined: 9/10/2003
From: Mt Laurel, NJ, USA
Status: offline 		Part one. The tool is made from a dremmel arbor with two cutting discs. One is a wood cutter and the other a metal cutter to get the right thickness of slot.

The tool runs in a ball bearing pressed into the tool support handle (a srap of ali angle bar). the other two bearings work like a router stand off.

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       Post #: 89

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/23/2004 4:24:20 AM   
Eric.Henderson



Posts: 1381
Joined: 9/10/2003
From: Mt Laurel, NJ, USA
Status: offline 		part 2

The area to be cut was doubled up with some 3/8" balsa. the ard part was taht is is an ARF and care had to be taken with the covering.

However it looks tidy and you lose the lip/edge that catches when you clean the bottom.

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       Post #: 90

RE: RE: RE: FOCUS II ARF construction by-the-numbers - 2/23/2004 4:30:15 AM   
Eric.Henderson