OS 160 Header
04-10-2010, 04:00 PM
#1
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OS 160 Header
I am using a Mueller header on my O.S. 160. It has since cracked. I had it welded, but it cracked again. Since Mr. Mueller is on longer in business, what are my options for replacing it? I'd hate to go with a huge stock muffler out the side and lose the power.
04-10-2010, 04:44 PM
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RE: OS 160 Header
Nathan, a friend of mine is working on a couple of sources for that. I will let him know about this post and hae him touch base with you.
Chuck Hochhalter
Chuck Hochhalter
04-12-2010, 07:10 PM
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RE: OS 160 Header
ORIGINAL: M.Kimbro
I have also a pic of the pump set up that I used on my 160's.
Matt Kimbro
I have also a pic of the pump set up that I used on my 160's.
Matt Kimbro
04-12-2010, 08:45 PM
#8
RE: OS 160 Header
ORIGINAL: M.Kimbro
Nathan,
Here are some pics of the header that I have also a pic of the pump set up that I used on my 160's.
Matt Kimbro
Nathan,
Here are some pics of the header that I have also a pic of the pump set up that I used on my 160's.
Matt Kimbro
04-12-2010, 09:26 PM
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RE: OS 160 Header
perfect, matt can you give me the length of the header? i'll use a MVVS 160 pipe, wich are you using?
[/quote]
The rise in the header is 3 inches from the center of the exhaust port, and the length of the header is 4 3/4 inches from the center of the exhaust port to the exit port of the header.
Matt Kimbro
[/quote]
The rise in the header is 3 inches from the center of the exhaust port, and the length of the header is 4 3/4 inches from the center of the exhaust port to the exit port of the header.
Matt Kimbro
04-16-2010, 11:04 AM
#12
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RE: OS 160 Header
Renegade:
Do you think that it is a problem that could be remedied by simply making the bolt hole on the mounting flange larger (i.e. could you fix the problem by opening the hole up from 4 mm to 5mm or by elongating the bolt hole)?
Thanks,
Ed
Do you think that it is a problem that could be remedied by simply making the bolt hole on the mounting flange larger (i.e. could you fix the problem by opening the hole up from 4 mm to 5mm or by elongating the bolt hole)?
Thanks,
Ed
06-13-2010, 07:04 PM
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RE: OS 160 Header
I'm experiencing the same problem as Nathan King, when my present Mueller header breaks, Not sure what I'll do. I would appreciate it if you guys in the know about a solution could keep us posted..
06-13-2010, 07:59 PM
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RE: OS 160 Header
Hope I'm not cursing myself here but I've been flying OS160 with different headers and pipes for 4 years now in my pattern planes and have never had a failure. I have used different soft mounts and only one rear mount with a wire tie. Works well.
RC
RC
06-13-2010, 09:21 PM
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RE: OS 160 Header
Ed, I would appreciate it.
RC, I had a Mueller header fail after about 25 flights. Was using a Hyde firm idle mount and one rear pipe support. I even followed Bob Pastorello's OS160 cookbook and cut my header after the bend and used the remaining cut-off length of header with two couplers for stress relief. I have since added a front pipe support and haven't had any problems. I feel the front of the pipe was allowed to move around too much putting undo stress on the header. BUT, you know as well as I do, when you think it's all working fine, you will have a failure, usually at a contest. I learned that the hard way when I didn't have a back-up.... I'm on my last Mueller header now. I do have a MACS header from Central for a back-up, but it was their last one and they won't be getting anymore. So....I'm always looking for options. Might just have to join the considerably larger YS crowd!!!! Man, that's gonna hurt the pocketbook....
RC, I had a Mueller header fail after about 25 flights. Was using a Hyde firm idle mount and one rear pipe support. I even followed Bob Pastorello's OS160 cookbook and cut my header after the bend and used the remaining cut-off length of header with two couplers for stress relief. I have since added a front pipe support and haven't had any problems. I feel the front of the pipe was allowed to move around too much putting undo stress on the header. BUT, you know as well as I do, when you think it's all working fine, you will have a failure, usually at a contest. I learned that the hard way when I didn't have a back-up.... I'm on my last Mueller header now. I do have a MACS header from Central for a back-up, but it was their last one and they won't be getting anymore. So....I'm always looking for options. Might just have to join the considerably larger YS crowd!!!! Man, that's gonna hurt the pocketbook....
06-13-2010, 09:35 PM
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RE: OS 160 Header
Saw your post on the Rev Pro. Ray Morton flew one with the OS140 through at least 2 seasons and he flies FAI and very competetivly I might add. Plenty of stuff with his combo. Even flew it with the 18.1X10 APC. I'm sure the 140 would work for you. I just sold mine after a couple of seasons in a Temptation. Set up ran perfectly always. Flip and Fly! Plane weighed in at 10# 2oz and had tons of verticle. Good luck.
RC
RC
06-14-2010, 05:53 AM
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RE: OS 160 Header
RC,
Do you think I would get that kind of performance at 3000 ft. of alt.? I fly in D2, considerably lower altitude, but practice at home in the mountains of WV. Definitely less power up here.
What header, pipe, fuel combo was he using in the Rev Pro?
Thanx for the help,
Kevin
Do you think I would get that kind of performance at 3000 ft. of alt.? I fly in D2, considerably lower altitude, but practice at home in the mountains of WV. Definitely less power up here.
What header, pipe, fuel combo was he using in the Rev Pro?
Thanx for the help,
Kevin
07-25-2010, 03:52 PM
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RE: OS 160 Header
Nathan/RustyWallace/ et al:
Just an update on the OS 160 Header issue. I have the first batch of OS 160 headers in my hands and am in the process of running one on my test bench. I have two out in the field but they have not yet flown. The headers are 3/4" ID and have a 2 3/8" rise. Header length from the plug to the aft end of the header tube is approximately 7". I do not have the option of doing custom at this time but we will see what the future brings. My test engine is a new 160 with about 1 gallon of fuel thru it running my header and an ES designs carbon pipe on Rich's Brew 15 %. I have run the APC 17X10, 17X12 and 18.1X10. The first runs were with stock length header butted up against the front of the pipe. Straight line length (from the plug to the first refelcting baffle) was 22.5" and 28.5" if you go from the plug and follow the center of the header back to the first reflecting baffle. The first reflecting baffel according to Ed at ES Composites is 15.5" back from the front of the pipe.
APC 17X10 8300
APC 17X12 8000
APC 18.1X10 8100
I shortened the header by 1/2" (length from the plug to the first refelcting baffle was 22") and the APC 17X12 turned 8250 (forgot to check the 18.1X10). I shortened the header another 1/2" (length from plug to baffle was now 21.5"and got the following):
APC 17X12 8350
APC 18.1X10 8000
I will refrain from suggesting header/pipe tuning length until we get some flight data and decide what works best for our application.
I am currently working on a test plane to fly the header but if anyone is interested in talking about the header and availability please send me an e-mail (please don't send a PM as I sometimes forget to look at them). In the "Subject" line please put "OS 160 Header".
Thanks,
Ed Valls
210-957-2152
e-mail: [email protected]
Just an update on the OS 160 Header issue. I have the first batch of OS 160 headers in my hands and am in the process of running one on my test bench. I have two out in the field but they have not yet flown. The headers are 3/4" ID and have a 2 3/8" rise. Header length from the plug to the aft end of the header tube is approximately 7". I do not have the option of doing custom at this time but we will see what the future brings. My test engine is a new 160 with about 1 gallon of fuel thru it running my header and an ES designs carbon pipe on Rich's Brew 15 %. I have run the APC 17X10, 17X12 and 18.1X10. The first runs were with stock length header butted up against the front of the pipe. Straight line length (from the plug to the first refelcting baffle) was 22.5" and 28.5" if you go from the plug and follow the center of the header back to the first reflecting baffle. The first reflecting baffel according to Ed at ES Composites is 15.5" back from the front of the pipe.
APC 17X10 8300
APC 17X12 8000
APC 18.1X10 8100
I shortened the header by 1/2" (length from the plug to the first refelcting baffle was 22") and the APC 17X12 turned 8250 (forgot to check the 18.1X10). I shortened the header another 1/2" (length from plug to baffle was now 21.5"and got the following):
APC 17X12 8350
APC 18.1X10 8000
I will refrain from suggesting header/pipe tuning length until we get some flight data and decide what works best for our application.
I am currently working on a test plane to fly the header but if anyone is interested in talking about the header and availability please send me an e-mail (please don't send a PM as I sometimes forget to look at them). In the "Subject" line please put "OS 160 Header".
Thanks,
Ed Valls
210-957-2152
e-mail: [email protected]
08-23-2010, 10:40 PM
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RE: OS 160 Header
I made up a bunch of these but sold all of them. I will make another batch soon but I am currently making molds for a bunch of Classic Pattern Planes. Once I catch up on dozens of orders for these planes I will post a blog or something for headers.
09-14-2010, 11:32 PM
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RE: OS 160 Header
ORIGINAL: frequent flyer
I made up a bunch of these but sold all of them. I will make another batch soon but I am currently making molds for a bunch of Classic Pattern Planes. Once I catch up on dozens of orders for these planes I will post a blog or something for headers.
I made up a bunch of these but sold all of them. I will make another batch soon but I am currently making molds for a bunch of Classic Pattern Planes. Once I catch up on dozens of orders for these planes I will post a blog or something for headers.
Are they welded or brazed?
09-15-2010, 12:04 AM
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RE: OS 160 Header
I have a mandrel bender that I custom built. I can bend 3/4" tube down to a 1.5 inch radius 1"tube down to a 2" radius. I tig weld the headers. Small glow engines like the OS160 is alum tube and the larger headers like for a 100cc or 150 cc gas engine I make out of steel tube and tig weld.
09-15-2010, 07:57 AM
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RE: OS 160 Header
ORIGINAL: frequent flyer
I have a mandrel bender that I custom built. I can bend 3/4'' tube down to a 1.5 inch radius 1''tube down to a 2'' radius. I tig weld the headers. Small glow engines like the OS160 is alum tube and the larger headers like for a 100cc or 150 cc gas engine I make out of steel tube and tig weld.
I have a mandrel bender that I custom built. I can bend 3/4'' tube down to a 1.5 inch radius 1''tube down to a 2'' radius. I tig weld the headers. Small glow engines like the OS160 is alum tube and the larger headers like for a 100cc or 150 cc gas engine I make out of steel tube and tig weld.
