Today's Message Index:
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1. 02:40 AM - Re: Re: Oil problem (pj.ladd)
2. 07:20 AM - Re: Oil problem (dons701)
3. 05:10 PM - Propeller and RPM (Chuck Deiterich)
Message 1
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The senders frequently have problems. Change washers only after you
change the sender.>>
Hi Doug,
thanks for the head up. I have changed the sender once already.
Pat
Message 2
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Hi Pat
I have read this post and I did not see that you have tried temporarily installing
a known good mechanical gauge by using a tee under the electric sender.
As explained earlier, this would give you a nice comparison of actual pressures
as seen from two different sources at the same time. Just use some nylon tubing
and temporarily mount the gauge with electrical ties in such a way as to allow
you to view it from "behind the stick". Please let us know the numbers you
see. 8)
Don
--------
Zenith 701 #76120
Jabiru 2200A #2456 55 hours
Sensenich Wood 64-PJ-36 Prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264303#264303
Message 3
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| Subject: | Propeller and RPM |
I have a Zenith CH 701 and a Jabiru 2200 SN 988 (should be 80 hp) with a
Bing 40 mm carb and second generation tuning kit, that is, OD3 needle,
290 needle jet, but 230 main jet.
Static (tied down) max RPM, with my Prince P-Tip 64x26 prop, is 3000 RPM
and EGT's 1200F +/- 20F. In flight, climb 55 mph 3000 RPM and EGT's
1200F +/- 20F. Level flight WOT 3120 RPM. Cruise EGT's are about 1300F.
Static max RPM with a Tennessee Propeller 64x34 is 2820 RPM and EGT's
1200F +/- 20F. In flight with the Tennessee prop, climb was 500 fpm or
about half that with the Prince prop. Cruise about 4 mph faster or 74
mph at 2850 RPM.
Since Jabiru USA supplies a Tennessee 64x36 prop for their CH701 Jabiru
2200 (85 hp) firewall forward kit, I thought I should get more static
RPM and performance from the Tennessee prop.
I put the Prince prop back on and thinking it could be my air flow, I
did static tests with (1) filter removed from air box, (2) a 3.5 inch
tube on the back of the carb and (3) nothing on the carb. Static RPM
was same with filter and no filter, however, with the tube or the plain
carb, the RPM was 40 less and the EGT's on front cylinders dropped to
1135F, and rear cylinders were about 1225F.
CHT's run about 220F. I have always used 100 LL fuel.
The blade area of the Prince prop is about 15 % greater. Any ideas why
my WOT RPM is limited?
Chuck D.
N701TX
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