Today's Message Index:
----------------------
1. 03:00 AM - Re: Re: Prop balancing (GARY PENNINGTON)
2. 04:32 AM - Re: Re: Uneven EGTs at full throttle (N1BZRich@AOL.COM)
3. 07:46 AM - Re: Prop balancing (Bill Strahan)
4. 07:50 AM - Re: Uneven EGTs at full throttle (Bill Strahan)
5. 06:13 PM - Primer with Bing Carburetor (IFLYSMODEL@aol.com)
Message 1
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| Subject: | Re: Prop balancing |
Good morning Johnny
How are things with you?
I'm curious. How much would it cost to balance the prop?
Thanks for your time and have a great day.
Gary Pennington
----- Original Message -----
From: Bill Strahan<mailto:bill@gdsx.com>
To: lightning-list@matronics.com<mailto:lightning-list@matronics.com>
Sent: Friday, November 13, 2009 10:06 PM
Subject: Lightning-List: Re: Prop balancing
<bill@gdsx.com<mailto:bill@gdsx.com>>
8wn(at)comcast.net wrote:
> Bill
>
> Looks like you will have no problem bringing the ips below .07. I
have been
> balancing props for a while and would like to have more info from
you.
> What type of prop? Ground adjustable or fixed?
> What type of spinner. Composite or metal?
> What engine, solid or hydraulic.
> Hours on engine?
>
> I have found much worse on a Lighting I am working with. Static RPM
was
> 2675.
> First run was 3.5 ips. That is twice as high as any I have ever seen
and way
> over the maximum. Prop was pulled, ground adjustable, sent to
factory for
> rework and returned. Next run was about 2.8. Composite spinner was
removed
> and vibe was .8+-. Balanced to about .35. New metal spinner was
installed
> and will run a new balance soon. Engine is solid lifters at about
250
> hours. I will be doing a balance on my Lightning in the next week.
>
> Hope more will start having their aircraft dynamic balanced. It is
worth the
> cost.
> Johnny Thompson
>
>
> ---
Sorry, didn't address this sooner.
What type of prop? Ground adjustable or fixed?
Fixed
What type of spinner. Composite or metal?
Metal
What engine, solid or hydraulic.
Hydraulic
Hours on engine?
32
For what it's worth, it took about 15 grams of weight on the spinner
backplate to balance it to .05 IPS.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272772#272772<http://forums
.matronics.com/viewtopic.php?p=272772#272772>
www.aeroelectric.com<http://www.aeroelectric.com/>
www.buildersbooks.com<http://www.buildersbooks.com/>
www.homebuilthelp.com<http://www.homebuilthelp.com/>
http://www.matronics.com/contribution<http://www.matronics.com/contributi
on>
http://www.matronics.com/Navigator?Lightning-List<http://www.matronics.co
m/Navigator?Lightning-List>
Message 2
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| Subject: | Re: Uneven EGTs at full throttle |
Bill,
I suspect you are on the right track. When our EAA chapter had
similar problems with the Jab 3300 installation in the 601XL we built, we ended
up using a radiator hose from a Caterpillar tractor. Sorry, don't remember
the part number (that was around 2 years ago) but it solved the problem and
continues to work well.
Blue Skies,
Buz Rich
Message 3
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| Subject: | Re: Prop balancing |
Cost? Depends on how much fuel it takes to get to Mckinney, Texas. :)
I've got the brackets, and have done this twice now and just enjoyed it. I'm happy
to have any Lightning owner (and one Zenair I know of) come by and I'll help
them do it.
It's actually VERY fast once you make the brackets:
1) remove the cowl
2) remove two plugs on the front of the engine (thanks Pete!)
3) mount the brackets there with 5/16-18 bolts
4) run the engine and take a reading. This reading will provide the vibration
in inches per second as well as information to calcualte the angular measurement
from the sensor that requires weight to be added
5) if the IPS is too high, add some weight with a washer under a spinner screw
and repeate step 4
6) take all the washers off, weigh them, and replace with lead weights inside the
spinner
7) the lead will be in a slightly different place than the washers, so do it all
again but this time you're just fine tuning with some really small washers to
get it to .05 or less
8) remove the brackets, replace the plugs with loctite
9) go fly and say "ahhhhhh" and let your headset touch the canopy and say 'wow!"
:)
Steps 4-7 took me about 15 minutes.
I'll attach a pic of the sensors mounted.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272808#272808
Attachments:
http://forums.matronics.com//files/lightningpropbalance_389.jpg
Message 4
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| Subject: | Re: Uneven EGTs at full throttle |
We shall see. Here's the pic of the one I decided wasn't quite good enough.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272809#272809
Attachments:
http://forums.matronics.com//files/elbow_296.jpg
Message 5
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| Subject: | Primer with Bing Carburetor |
Hey Guys & Gals: Has anyone put a primer on their Jabiru with a Bing
carburetor?
Lynn Nelsen
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