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lcottrell
Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
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 Posted: Wed Jul 01, 2009 1:44 pm Post subject: HACman system |
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I just completed the installation of the "HACman system" by Jerry (at) Green Sky Aviation. Cost plus shipping was $201.00. This is of course the one for the 912 Rotax and HKS engines. I took it up for only 18 minutes as a short test since I didn't finish the installation until the thermals were bumping and the temps were climbing. Primarily I wanted to make sure that I had it working before I take a test trip with it. I had no problem controlling the EGT's at all. The EGT has been quite low all along, reading in the low 1200's and should be in the high 1300's to achieve maximum horsepower and fuel usage.
I made a 3 hour flight with it today and posted the pictures and findings on my Blog. You are welcome to view it if you would like the URL is;
http://owyheeflyer.blogspot.com/
Larry C.
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Thu Jul 02, 2009 3:38 am Post subject: Re: HACman system |
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Larry C.
Thanks for posting your initial results of the HACman. WIth my GA flying background, it took me a while to get used to not manually adjusting mixture when I first started flying a 912. I still like the ability to manually adjust mixture in-flight. When I fly really slow the Bing 64s allow the mixture to get a lot richer than ideal. When tuned properly, they do a fine job anywhere near normal cruise power. I may get one these someday. I believe it works on the same principle that Jack Hart used to rig his own manual mixture control, but not sure.
At the moment, I'm not flying 'cuz one of my partners broke our airplane a month ago (no injuries) and we're still waiting on the insurance adjuster to do his thing. It may be totaled, may not.
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Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
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lcottrell
Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
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| Posted: Thu Jul 02, 2009 7:53 am Post subject: HACman system |
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Today I flew to the Alvord to test fuel burn close to the ground with the system. First I marked the front tanks fuel level, so that I could be at least close to correct. I started and warmed up the plane using the back tank, and when it was ready to go, I switched to the front tank, climbing to 500 feet to activate the GPS timing system, then only maintaining enough altitude to clear the hills between me and the Alvord. I did not change the throttle position once I established about 5360 RPM's until I set up for a landing here at the house. I did dial in the EGT to 1350 degrees and changed the setting to match the MSL. Keep in mind that the higher you go, the richer the fuel mixture, so on occasion a change was required. All of this including a couple of video's will be posted to my blog later in the day.
The flight covered one hour and 24 minutes from warm up to landing. I burned a total of three gallons of fuel from both tanks. I burned 2.3 gallons on the timed front tank flight, and 7 tenths of a gallon on warm up and the extra 24 minutes.
The OAT was 70 degrees, winds mostly calm, approximately 5 MPH wind out of the SW. Average speed of 62 MPH. The CHT's were well within limits at around 306 degrees. A great day for flying, and I am very happy with the results.
Larry C
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lcottrell
Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
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| Posted: Fri Jul 03, 2009 5:49 am Post subject: HACman system |
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I finally managed to post three short video's on my blog. Not sure why but it took forever to upload the video's even though they were short. The quality also sucks as well. Can't have every thing I guess.
[quote]
I made a 3 hour flight with it today and posted the pictures and findings on my Blog. You are welcome to view it if you would like the URL is;
http://owyheeflyer.blogspot.com/
Larry C.
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- Release Date: 07/01/09 18:07:00
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lcottrell
Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
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| Posted: Thu Jul 09, 2009 9:14 am Post subject: HACman system |
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I pulled my plugs to see how they looked after flying the HACman system for three hours or so at the higher EGT readings.
[img]cid:2AD0D290676B4516B4851C7498223A9A(at)larryPC[/img]
These plugs now have 50 hours on them, and couldn't look better.
I just uploaded a new entry to my blog with a short video on the flight that I made this morning. Not as long as I would have like as the weather was a bit cranky.
Larry
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Thu Jul 09, 2009 9:42 am Post subject: HACman system |
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Larry C:
Is that an iridium plug?
What brand and number is it?
I run them in my Suziki dirt bike and Honda ATV. Never had to change either.
I need to find a replacement for NGK DRC8E, but Nipondenso doesn't have an exact exchange. The have one for the DRC7E (912UL), but too hot for the 912ULS. If I can ever find an exact swap, I'll spend the bucks for the iridium plugs.
50 days more or less until Labor Day weekend. Then I am headed West!!!
john h
| Quote: |
I pulled my plugs to see how they looked after flying the HACman system for three hours or so at the higher EGT readings.
These plugs now have 50 hours on them, and couldn't look better.
I just uploaded a new entry to my blog with a short video on the flight that I made this morning. Not as long as I would have like as the weather was a bit cranky.
Larry
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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lcottrell
Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
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| Posted: Thu Jul 09, 2009 10:04 am Post subject: HACman system |
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Yup! it is a DENSO 1K24C11. If these do the job then I am sure that Jerry Olenik (at) Green Sky has them. You might talk to him about them. 352 475-5625 or toll free 888 887-5625
| Quote: | Jerry's cell 352 318-5625
fax
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Larry
[quote] ---
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