Today's Message Index:
----------------------
1. 11:37 PM - 28747 with a Powerflow (TeamGrumman@AOL.COM)
2. 11:45 PM - 28747 with a Powerflow (TeamGrumman@AOL.COM)
Message 1
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| Subject: | 28747 with a Powerflow |
--> TeamGrumman-List message posted by: TeamGrumman@aol.com
A couple of weeks ago, the #1-#3 "Y" set of pipes broke completely out of the
muffler. Looks pretty radical. I suspect the metallurgy had changed due
to the missing internal baffle nad fatigued the end cap on the muffler. At
any rate, those of you who have a missing baffle, be forwarned.
The upside is that my cowling was subjected to a real world burn test for
about an hour and it passed with flying colors.
Rather than replace the muffler, I decided to go with the Powerflow. The
new shorter powerflow.
First flight today. I got about an additional 100 rpm at 12,500 feet.
Some is due to reduced drag.
1) climb at 7000 feet at 110 knots and 2590 rpm was 800 fpm
2) climb at 9000 feet at 102 knots and 2560 rpm was 600 fpm
3) climb at 10000 through 11500 feet at 102 knots and 2570 rpm was 5500 fpm
4) climb at 12500 feet at 100 knots and 2550 rpm was 350-400 fpm
5) climb at 13500 feet at 100 knots and 2600 rpm was 350 fpm
6) at 14,500 ft and flat out at 2680 rpm I was indicating 114 knots. OAT
was 36F
7) at 13,500 ft and flat out at 2730 rpm I was indicating 120 knots. OAT
was 41F
8) at 7500 ft and flat out at classified rpm I was indicating 133 knots.
OAT was 60F
Overall, I was pleased with the Powerflow.
Gary
Message 2
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| Subject: | 28747 with a Powerflow |
--> TeamGrumman-List message posted by: TeamGrumman@aol.com
A couple of weeks ago, the #1-#3 "Y" set of pipes broke completely out of the
muffler. Looks pretty radical. I suspect the metallurgy had changed due
to the missing internal baffle nad fatigued the end cap on the muffler. At
any rate, those of you who have a missing baffle, be forwarned.
The upside is that my cowling was subjected to a real world burn test for
about an hour and it passed with flying colors.
Rather than replace the muffler, I decided to go with the Powerflow. The
new shorter powerflow.
First flight today. I got about an additional 100 rpm at 12,500 feet.
Some is due to reduced drag.
1) climb at 7000 feet at 110 knots and 2590 rpm was 800 fpm
2) climb at 9000 feet at 102 knots and 2560 rpm was 600 fpm
3) climb at 10000 through 11500 feet at 102 knots and 2570 rpm was 5500 fpm
4) climb at 12500 feet at 100 knots and 2550 rpm was 350-400 fpm
5) climb at 13500 feet at 100 knots and 2600 rpm was 350 fpm
6) at 14,500 ft and flat out at 2680 rpm I was indicating 114 knots. OAT
was 36F
7) at 13,500 ft and flat out at 2730 rpm I was indicating 120 knots. OAT
was 41F
8) at 7500 ft and flat out at classified rpm I was indicating 133 knots.
OAT was 60F
Overall, I was pleased with the Powerflow.
Gary
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