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Engine basics => Engine set up tips => Topic started by: FLOYD CARTER on June 21, 2015, 04:04:23 PM

Title: Tuned Pipe weight
Post by: FLOYD CARTER on June 21, 2015, 04:04:23 PM

I'm testing a Mac's tuned pipe on a RO-Jett 61.  Bench running looks promising, although I haven't decided on the exact tuning, glo plug to first baffle.

This pipe is aluminum and weighs 4 oz.  I'm now concerned about the weight, even though the weight will be pretty much centered on the CG.

I know there are pipes made of carbon fiber, and lighter.  I was attracted to the aluminum pipe for its guaranteed "long life".

Has anyone used aluminum tuned pipes?  Hard for me to tell because they are usually buried and out of sight.

Floyd

Title: Re: Tuned Pipe weight
Post by: Jim Kraft on June 22, 2015, 10:48:43 AM

I ran an Hatori aluminum pipe in R/C pattern for 8 years with good success. There is nothing to wear out or burn holes in and they seem to last forever. But, I am sure the carbon fiber pipes are a lot lighter. Maybe someone here will chime in with experience in control line with one.

Title: Re: Tuned Pipe weight
Post by: Igor Burger on June 22, 2015, 01:21:33 PM

good alu pipe will weight less than 2 oz :- ))

Title: Re: Tuned Pipe weight
Post by: Tim Wescott on June 22, 2015, 03:14:34 PM

Does a 12-pole motor need a shorter pipe than an 8-pole motor?

Title: Re: Tuned Pipe weight
Post by: Steve Helmick on June 23, 2015, 02:48:24 PM

Dirty Dan ran MACS aluminum tuned pipe on his .25FP...after he built a Wimpact that was too big for the .21FP. I'd give him a jingle and offer some produce in exchange for info.  y1 Steve

Title: Re: Tuned Pipe weight
Post by: FLOYD CARTER on June 24, 2015, 10:33:33 AM

I'm afraid I can't do business with Dan.  We tried to grow veggies here, but the deer somehow manage to get through our fencing and eat everything down to the roots.

Floyd

Title: Re: Tuned Pipe weight
Post by: Steve Helmick on June 25, 2015, 04:25:23 PM

Here's the Dirt (figuratively speaking). Dan used the #1020 pipe from the "Quiet Tuned Pipes" chart. If yours is from that chart, and is the correct size for your RO-Jett .61 (#1060) , I'd bet it'd work fine if you correctly locate the baffle.  D>K Steve

http://www.macspro.com/tunedpipes.asp (http://www.macspro.com/tunedpipes.asp)

Title: Re: Tuned Pipe weight
Post by: FLOYD CARTER on June 25, 2015, 06:23:02 PM

Yes, Steve.  The pipe is a Mac's # 1060.  I'll use the pipe length recommended on the chart.

Floyd