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BobbyPaulk(at)comcast.net
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 Posted: Thu Aug 28, 2014 4:31 pm Post subject: RPM |
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DonB,
I just flew today and observed the following:
My full throttle RPM at 100 MPH is 2830. ( From 60 to 1000' )
EGT's are 1200 to 1250 on #1 thru 4 and 6.
Number 5 is about 1300 ~ 1310. Outside air temp 92 degrees.
My Ram Air ducts at the rear tuck back toward the front at about a 45 degree angle following the curvature of the heads.
My conditional insp. is due in Sept and I am planning on tilting the bottom of the carb a little more toward the #5 cylinder.
I still have not heard from anyone who has drilled out the aerator that sits on top of the needle jet and the passage to it.
Bobby ( age 76 )
Zodiac 601 XL "B"
Jabiru 3300 S/N 1141
Sensenich 64" x 51" Prop
Bing Carb 260 Main & 290 Needle Jet
Status - Flying 224 hrs.
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pete(at)usjabiru.com
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| Posted: Fri Aug 29, 2014 4:54 am Post subject: RPM |
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If you are considering tilting the carb only do it if cruise egt’s are higher on one side than the other. Do not tilt the carb based on a full throttle climb reading. Climb the aircraft to a typical cruise altitude, throttle back to a cruise rpm, let temperatures stabilize and then write down your EGT’s. If the right side cylinders are consistently higher than the left side then consider tilting the carb.
Pete
From: owner-jabiruengine-list-server(at)matronics.com [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of BobbyPaulk(at)comcast.net
Sent: Thursday, August 28, 2014 7:30 PM
To: Server, JabiruEngine-List Digest
Subject: RPM
DonB,
I just flew today and observed the following:
My full throttle RPM at 100 MPH is 2830. ( From 60 to 1000' )
EGT's are 1200 to 1250 on #1 thru 4 and 6.
Number 5 is about 1300 ~ 1310. Outside air temp 92 degrees.
My Ram Air ducts at the rear tuck back toward the front at about a 45 degree angle following the curvature of the heads.
My conditional insp. is due in Sept and I am planning on tilting the bottom of the carb a little more toward the #5 cylinder.
I still have not heard from anyone who has drilled out the aerator that sits on top of the needle jet and the passage to it.
Bobby ( age 76 )
Zodiac 601 XL "B"
Jabiru 3300 S/N 1141
Sensenich 64" x 51" Prop
Bing Carb 260 Main & 290 Needle Jet
Status - Flying 224 hrs.
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| | - The Matronics JabiruEngine-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?JabiruEngine-List |
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