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02-16-2011, 07:53 PM
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Join Date: Dec 2005
Location: Sedalia, Colorado (KAPA)
Posts: 320
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Data recorder for lean tests
For the sake of your fellow pilots that might be in the air at the same time, bring a data recorder (qualified passenger!) to twist knobs and write numbers down while you look out the window. Might be not be obvious until you try it. And you will get better data
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Duane Zavadil
RV-6a, IO-320
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02-16-2011, 08:03 PM
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Join Date: Jan 2005
Posts: 3,646
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Quote:
Originally Posted by hydroguy2
METAR text: KBZN 161956Z 21019G29KT 10SM CLR 08/M06 A2932 RMK AO2 PK WND 21029/1948 SLP928 T00831061
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Brian-you're complaining about 19 gusting to 29? You need to come to Ellensburg someday!
BTW, your plane looks fantastic. Glad my Dynon tray found such a nice home! (That is mine, right?)
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Steve M.
Ellensburg WA
RV-9 Flying, 0-320, Catto
Donation reminder: Jan. 2021
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02-16-2011, 08:15 PM
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Join Date: Sep 2006
Location: Townsend, Montana
Posts: 3,179
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for safety reasons I'll just set up for cruise, then slowly reduce the mixture 0.2gph increments and let the Dynon record everything. I can retrieve the data back at the hangar. although I do have a friend who has been begging to be a safety pilot.
Steve, I'll make it over that way one of these days. right now, I'm a crosswind wimp. especially since my skills are so rusty. We had 40-50mph winds a couple days ago. No thanks, I'm in it for the fun. Once I can make 2 landings the same I'll expand my comfort to include crosswinds and gusts.
Dynon tray worked out great. Thanks, it helped me build my panel before I spent bigger cash.
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Retired Dam guy. Life is good.
Brian, N155BKsold but bought back.
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02-16-2011, 08:21 PM
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Join Date: Dec 2005
Location: Sedalia, Colorado (KAPA)
Posts: 320
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Envy
Hydroguy2
A real data recorder! Something else that I have airplane lust for!
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Duane Zavadil
RV-6a, IO-320
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02-16-2011, 09:25 PM
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Join Date: Jan 2005
Posts: 3,646
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Quote:
Originally Posted by hydroguy2
I'm a crosswind wimp. especially since my skills are so rusty. We had 40-50mph winds a couple days ago. No thanks, I'm in it for the fun. Once I can make 2 landings the same I'll expand my comfort to include crosswinds and gusts.
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Yeah, I was just kidding about the wind. There are some unflyable days like that here in Ellensburg. Rarely for visibility, but often for wind. Soon as I get up and flying I'll be over at MSO and Stevensville a lot visiting my brother so I hope to get out your way too.
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Steve M.
Ellensburg WA
RV-9 Flying, 0-320, Catto
Donation reminder: Jan. 2021
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03-07-2011, 09:36 AM
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Join Date: Jan 2006
Location: Belgium
Posts: 645
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Get "controlled"
Quote:
Originally Posted by zav6a
For the sake of your fellow pilots that might be in the air at the same time, bring a data recorder (qualified passenger!) to twist knobs and write numbers down while you look out the window. Might be not be obvious until you try it. And you will get better data
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Do as I did: file a flight plan into controlled area and "they" (ATC) will look out for you!
Regards, Tonny.
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"Pilottonny"
Tonny Tromp
Lanaken, Belgium (EU)
RV9A, Registration: PH-VAN
ECI-Titan IOX-320 with dual EI, turning a Whirlwind 200RV CS prop.
Sold
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03-07-2011, 10:12 AM
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Join Date: Jan 2006
Location: Belgium
Posts: 645
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Precision Airmotive "not helpfull"!
I just did my injector balance-check. Cylinders are peaking 0,6 Gal/hr apart. I sent the numbers to Precision Airmotive with the request for injector/restrictor adjustment advice.
This is what their exact answer was: I am sorry, but we do not offer different restrictors for the injectors. From your chart, it appears that your EGT splits are well within spec and your engine is operating correctly
Because I was not satisfied with the answer I called Peter Nielson at Precision. I told him that the spread is too big for LOP operation. All he had to say was that I should not run LOP! The fact that I bought a fuel injection system, instead of a carburetor, to be able to run LOP did not interest him at all!
I asked him for the nozzle size but he would not tell me!. In the end he admitted that I could try swapping the nozzles because that might make a difference, “since their nozzles are all different sizes”!!!???. Well I jsut had to put the phone down...........
Don, if you are reading this, I am sorry that my engine builder installed the wrong system, but do you have any advice?
I can send you the chart as an excel file, if you are willing to look at it.
Anybody else with advice is welcome too! Regards, Tonny.
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"Pilottonny"
Tonny Tromp
Lanaken, Belgium (EU)
RV9A, Registration: PH-VAN
ECI-Titan IOX-320 with dual EI, turning a Whirlwind 200RV CS prop.
Sold
Last edited by Pilottonny : 03-07-2011 at 10:15 AM.
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03-07-2011, 10:34 AM
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Join Date: Jun 2006
Location: North Carolina
Posts: 76
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Airflow Performance!
Call Don at Airflow Performance. No .. you didn't buy an Airflow fuel injection system, but Don will help you anyway. He is just that kind of guy. I suspect he can help you flow-balance your system by helping you swap out your injector nozzles.
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Dwight Frye - Raleigh/Cary NC
http://www.openweave.org/rv7/
RV-7 N4932L/Tip-Up/Superior 180hp/API Fuel Injection/Boss Aircraft Paint
First Flight : September 2, 2013
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03-07-2011, 04:54 PM
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Join Date: Jun 2006
Posts: 316
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Nozzle Tuning
Tonny,
Just email me the data to don@airflowperformance.com. Basically we need to know where each cylinder peaks with relationship to fuel flow. Also if you have a 4 cylinder engine you want to do this at fuel flows above 7 GPH, otherwise the flow divider is trying to divide the flow. If you want to run at fuel flows at or below 7 GPH then you probably want to start off with a set of .024 restrictors. This will keep the flow divider out of the way at these low flows but will not restrict the fuel flow at high power settings.
BTW, stock Precision restrictors are .028. I don't know what the big secret is. But you have to forgive Precision. They really only know the certified world and they only make .028 and .032 (which are not interchangeable in the same nozzle body and the .032's are only used on some of the turbo installations) injector nozzles.
Don
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03-07-2011, 06:12 PM
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Join Date: Jan 2005
Location: Columbia, SC
Posts: 804
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I can attest that if you call Don with such data he **WILL** respond.
And not only that, when I stopped by with a so equipped plane and mentioned that is was NOT his FI system, he looked at with a look of like " .. and your point is?" :-)
He was there to HELP. And help he did. I arrived with numbers using his process but he even took the time to go flying with me and show me stuff while we got precise numbers under his guidance. (GRT System recorded data as did Don).
When we landed, he did his magic, went to the nozzle bay and picked the magic one(s), installed such in a matter of minutes, and made sure it worked as advertised.
I highly recommend Don!!
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James E. Clark
Columbia, SC
RV6 Flying, RV6A Cowling
APRS
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