RE: FOCUS II ARF construction by-the-numbers  
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All Forums >> RC Airplanes >> Pattern Flying >> RE: FOCUS II ARF construction by-the-numbers
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RE: FOCUS II ARF construction by-the-numbers - 2/15/2008 2:32:17 AM   
mtcarey


 

Posts: 161
Joined: 8/16/2002
From: Newell, NC, USA
Status: offline 		Focus with webra 160 & MC carb



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(in reply to Don Szczur)
       Post #: 226

RE: FOCUS II ARF construction by-the-numbers - 3/18/2008 2:31:34 AM   
mtcarey


 

Posts: 161
Joined: 8/16/2002
From: Newell, NC, USA
Status: offline 		Header broke after eleven flights. Any ideas why?



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(in reply to mtcarey)
       Post #: 227

RE: FOCUS II ARF construction by-the-numbers - 3/18/2008 3:18:09 AM   
lodomjr


 

Posts: 145
Joined: 1/25/2003
From: Lakeland, FL, USA
Status: offline 		Mtcarey,

Was the pipe supported just behind the header and the end of the pipe too. Or was it supported only at the end and the header supported the front of the pipe?

Larry

(in reply to mtcarey)
       Post #: 228

RE: FOCUS II ARF construction by-the-numbers - 3/18/2008 3:21:04 AM   
MarkGrabowski


 

Posts: 114
Joined: 11/11/2004
From: addison, IL, USA
Status: offline 		Is your pipe mounted in one place or two? I suspect that if it's mounted in two spots, there isn't enough flex in the system (as your engine moves around on the Hyde mount). There's a lot of leverage on that header when you consider low long the whole setup really is...
Just my two cents....

(in reply to mtcarey)
       Post #: 229

RE: FOCUS II ARF construction by-the-numbers - 3/18/2008 3:28:38 AM   
mtcarey


 

Posts: 161
Joined: 8/16/2002
From: Newell, NC, USA
Status: offline 		Their are 2 mounts. The front one consists of "o" rings held in place in a way which offers almost no resistance to the header movement

The rear one is a 1/2" silicone tube.

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< Message edited by mtcarey -- 3/18/2008 3:29:24 AM >

(in reply to MarkGrabowski)
       Post #: 230

RE: FOCUS II ARF construction by-the-numbers - 3/18/2008 3:44:12 AM   
lodomjr


 

Posts: 145
Joined: 1/25/2003
From: Lakeland, FL, USA
Status: offline 		Mtcarey,

I ran the Webra 1.45 with the Greves pipe system. I got the plane, engine and all already together and I noticed that the header was made of steel. Your header to me looks like a Mueller header from the photos. I ran the OS 160 with the Mueller header and what we did to keep them from cracking is to cut the header in half or a portion of it to make two parts. Then hold everything together with two couplers. From the looks of the coupler you are using, you will not have any blowouts. Try cutting the next header in two parts and use two couplers and let the header support the front of the pipe. The header will hold it just fine and the extra coupler will give it more flexability so the header will not crack.

Good luck
Larry

(in reply to mtcarey)
       Post #: 231

RE: FOCUS II ARF construction by-the-numbers - 3/18/2008 3:48:35 AM   
mtcarey


 

Posts: 161
Joined: 8/16/2002
From: Newell, NC, USA
Status: offline 		Great! That confirms what I've been thinking. Im going to go this way as a solution...

(in reply to lodomjr)
       Post #: 232

RE: FOCUS II ARF construction by-the-numbers - 3/18/2008 4:00:11 AM   
lodomjr


 

Posts: 145
Joined: 1/25/2003
From: Lakeland, FL, USA
Status: offline 		Mtcarey,

I'm not sure where you got your header. The Mueller headers are really nice and I know Horizon imports or carriers the Webra engines and parts including the pipes, headers and so forth. Where the steel header came from that I had, I don't know but it worked great. My engine had the regular two needle carb. and when I first got the thing it almost whipped me. I take pride in my abillities in tuning engines and this was tough. When I finally understood how she worked I actually got to run very well. Shoot, I had someone give me an almost new 1.45 cause they could not make it run. I could get to back flip it the first time every time after the first start of the day, and it ran very economical too. But that's the past and we've moved on to YS.

Larry

(in reply to mtcarey)
       Post #: 233

RE: FOCUS II ARF construction by-the-numbers - 3/19/2008 1:44:25 PM   
mtcarey


 

Posts: 161
Joined: 8/16/2002
From: Newell, NC, USA
Status: offline 		Did this! Far out man! Can you dig it!!!


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< Message edited by mtcarey -- 3/19/2008 1:45:58 PM >

(in reply to lodomjr)
       Post #: 234

RE: FOCUS II ARF construction by-the-numbers - 3/19/2008 7:52:48 PM   
MarkGrabowski


 

Posts: 114
Joined: 11/11/2004
From: addison, IL, USA
Status: offline 		Where did you get those nice steel hose clamps?

(in reply to mtcarey)
       Post #: 235

RE: FOCUS II ARF construction by-the-numbers - 3/19/2008 8:40:52 PM   
lodomjr


 

Posts: 145
Joined: 1/25/2003
From: Lakeland, FL, USA
Status: offline 		Mark,

Most real good hardware stores will have those clamps. They are not expensive either. I purchased some at an Ace Hardware Store for about .50 each and they work great.

Larry

(in reply to MarkGrabowski)
       Post #: 236

RE: FOCUS II ARF construction by-the-numbers - 3/20/2008 2:15:03 AM   
mtcarey


 

Posts: 161
Joined: 8/16/2002
From: Newell, NC, USA
Status: offline 		Wide-Band Self-Tightening Spring Hose and Tube Clamps
http://www.mcmaster.com/

Hose OD Width Thick. Qty. Per Pkg.

5/8" 37/64" 0.039" 10 7329K11 $3.93

21/32" 37/64" 0.033" 10 7329K12 3.37

3/4" 37/64" 0.051" 10 7329K13 5.59

25/32" 37/64" 0.051" 10 7329K14 5.64

15/16" 37/64" 0.051" 10 7329K15 6.15

1 1/16" 37/64" 0.063" 10 7329K16 7.56

1 21/32" 37/64" 0.075" 10 7329K17 11.32

1 31/32" 37/64" 0.079" 10 7329K18 13.74


(in reply to lodomjr)
       Post #: 237

RE: FOCUS II ARF construction by-the-numbers - 5/14/2008 5:32:59 PM   
mtcarey


 

Posts: 161
Joined: 8/16/2002
From: Newell, NC, USA
Status: offline 		Carbon Fiber landing gears!!!

Where can I get some light weight gears for the Focus II?

(in reply to mtcarey)
       Post #: 238

RE: FOCUS II ARF construction by-the-numbers - 5/14/2008 10:17:57 PM   
Ryan Smith


 

Posts: 749
Joined: 3/2/2002
From: Browns Summit, NC, USA
Status: offline 		Mark,

Look into Bolly gear. ES made some superb gear legs, however the last I heard, they were retooling and are out of stock.

_____________________________

www.somenzini.com, www.yspartsandservice.com, www.evil-rc.com

(in reply to mtcarey)
       Post #: 239