Today's Message Index:
----------------------
1. 05:07 AM - Re: Bing Type 64 Carb. Idle Mixture Setting (Thom Riddle)
2. 06:24 AM - Re: Re: Bing Type 64 Carb. Idle Mixture Setting (Hugh McKay)
3. 06:24 AM - Re: Bing Type 64 Carb. Idle Mixture Setting (Catz631@aol.com)
4. 07:24 AM - Re: Bing Type 64 Carb. Idle Mixture Setting (Ollie Washburn)
5. 07:44 AM - Re: Re: Bing Type 64 Carb. Idle Mixture Setting (Don Hudgeon)
Message 1
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| Subject: | Re: Bing Type 64 Carb. Idle Mixture Setting |
Hugh,
Roger is correct. I had our Allegro set up for 5500 WOT straight and level in-flight.
On the Allegro 2000 that turned out to be about 4800-4900 static rpm on
the ground. So for your first adjustment, add some pitch, at least one full degree,
tie down the airplane and do a full throttle static rpm test after the
engine is warmed up properly.
If the ground static is over 4900 rpm, add a bit more pitch to get it in the 4800-4900
rpm range and then go fly it and check the WOT S&L rpm. 5500 rpm +/- 50
rpm is your goal. Your climb performance won't be quite as good as it is now
but all around performance and economy will be much better and your spark plugs
will not be so black, except after prolonged periods of idle.
--------
Thom Riddle
Buffalo, NY (9G0)
Kolb Slingshot SS-021
Jabiru 2200A #1574
Tennessee Prop 64x32
Don't accept your dog's admiration as conclusive evidence that you are wonderful.
Ann Landers
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=333441#333441
Message 2
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| Subject: | Re: Bing Type 64 Carb. Idle Mixture Setting |
Roger, Thom:
OK, I've got it. I will start by changing the pitch from 15 degrees(where it
is now), to 16.5 degrees and try it. I will probably miss the climb-out
performance I am now getting, but you can't "have your cake and eat it to".
Hugh G. McKay III, P.E.
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
http://www.wwegeo.com
-----Original Message-----
From: Thom Riddle
Sent: Thursday, March 10, 2011 8:04 AM
Subject: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting
Hugh,
Roger is correct. I had our Allegro set up for 5500 WOT straight and level
in-flight. On the Allegro 2000 that turned out to be about 4800-4900 static
rpm on the ground. So for your first adjustment, add some pitch, at least
one full degree, tie down the airplane and do a full throttle static rpm
test after the engine is warmed up properly.
If the ground static is over 4900 rpm, add a bit more pitch to get it in the
4800-4900 rpm range and then go fly it and check the WOT S&L rpm. 5500 rpm
+/- 50 rpm is your goal. Your climb performance won't be quite as good as it
is now but all around performance and economy will be much better and your
spark plugs will not be so black, except after prolonged periods of idle.
--------
Thom Riddle
Buffalo, NY (9G0)
Kolb Slingshot SS-021
Jabiru 2200A #1574
Tennessee Prop 64x32
Don't accept your dog's admiration as conclusive evidence that you are
wonderful.
Ann Landers
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=333441#333441
Message 3
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| Subject: | Re: Bing Type 64 Carb. Idle Mixture Setting |
>You have the prop set in the general area so we don't really care about
the static
any more. Static changes for all props and I only use static for the the
very first run on a prop that I have no experience with. Static is just to
get
in the ballpark. WOT while flying is the only real way to get an accurate
WOT
rpm.<
Keep in mind Roger that Rotax has a recommended static rpm limit of 5200
rpm(WOT) or above ( in order to reduce the possibility of engine case
cracking). This was spelled out in a service bulletin.
Dick Maddux
Milton,Fl
Message 4
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| Subject: | Re: Bing Type 64 Carb. Idle Mixture Setting |
How much time do you spend at WOT static? I get 5250 rpm on climb out
at 70-80 mph with my S7S which gives me 5500-5600 rpm WOT level flight
and about 120-125 mph. Not bad for a cub type airplane. I cruise at
5200 rpm and indicate 108-110 mph as backed up by gps.
Ollie
On Thu, Mar 10, 2011 at 9:15 AM, <Catz631@aol.com> wrote:
>>You have the prop set in the general area so we don't really care about the
>> static
> any more. Static changes for all props and I only use static for the
> the
> very first run on a prop that I have no experience with. Static is
> just to get
> in the ballpark. WOT while flying is the only real way to get an
> accurate WOT
> rpm.<
>
>
> Keep in mind Roger that Rotax has a recommendedstatic rpm limitof 5200
> rpm(WOT) or above( in order to reduce the possibility of engine case
> cracking). This was spelled out in a service bulletin.
>
> Dick Maddux
> Milton,Fl
>
>
--
>From Central Florida,
Ollie
Message 5
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| Subject: | Re: Bing Type 64 Carb. Idle Mixture Setting |
Hello Hugh
Not sure about the Allegro, but the installation of an IFA prop solved all
these issues on my Kitfox Vixen. I just have the 912UL (80HP) and it has
made a "whole new aircraft" out of it.
You may not be able to do this as a sport aircraft, not sure.
Don
On Thu, Mar 10, 2011 at 6:17 AM, Hugh McKay <hgmckay@bellsouth.net> wrote:
> hgmckay@bellsouth.net>
>
> Roger, Thom:
>
> OK, I've got it. I will start by changing the pitch from 15 degrees(where
> it is now), to 16.5 degrees and try it. I will probably miss the climb-ou
t
> performance I am now getting, but you can't "have your cake and eat it to
".
>
>
> Hugh G. McKay III, P.E.
> Senior Consultant
> Worldwide Engineering Inc.
> 4090 North NC Hwy. 16
> Denver, NC 28037
>
> Ph. 704-661-8271
> Fax 704-483-5466
> email hgmckay@bellsouth.net
> http://www.wwegeo.com
> -----Original Message----- From: Thom Riddle
> Sent: Thursday, March 10, 2011 8:04 AM
>
> To: rotaxengines-list@matronics.com
> Subject: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting
>
m
> >
>
> Hugh,
> Roger is correct. I had our Allegro set up for 5500 WOT straight and leve
l
> in-flight. On the Allegro 2000 that turned out to be about 4800-4900 stat
ic
> rpm on the ground. So for your first adjustment, add some pitch, at least
> one full degree, tie down the airplane and do a full throttle static rpm
> test after the engine is warmed up properly.
>
> If the ground static is over 4900 rpm, add a bit more pitch to get it in
> the 4800-4900 rpm range and then go fly it and check the WOT S&L rpm. 550
0
> rpm +/- 50 rpm is your goal. Your climb performance won't be quite as goo
d
> as it is now but all around performance and economy will be much better a
nd
> your spark plugs will not be so black, except after prolonged periods of
> idle.
>
>
> --------
> Thom Riddle
> Buffalo, NY (9G0)
> Kolb Slingshot SS-021
> Jabiru 2200A #1574
> Tennessee Prop 64x32
>
>
> Don't accept your dog's admiration as conclusive evidence that you are
> wonderful. =C2
> =94Ann Landers
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=333441#333441
>
>
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