---------------------------------------------------------- Lightning-List Digest Archive --- Total Messages Posted Sat 11/14/09: 5 ---------------------------------------------------------- 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 _____________________________________ Time: 03:00:56 AM PST US From: "GARY PENNINGTON" Subject: Re: Lightning-List: 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 To: lightning-list@matronics.com Sent: Friday, November 13, 2009 10:06 PM Subject: Lightning-List: Re: Prop balancing > 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 www.aeroelectric.com www.buildersbooks.com www.homebuilthelp.com http://www.matronics.com/contribution http://www.matronics.com/Navigator?Lightning-List ________________________________ Message 2 _____________________________________ Time: 04:32:52 AM PST US From: N1BZRich@AOL.COM Subject: Re: Lightning-List: 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 _____________________________________ Time: 07:46:37 AM PST US Subject: Lightning-List: Re: Prop balancing From: "Bill Strahan" 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 _____________________________________ Time: 07:50:10 AM PST US Subject: Lightning-List: Re: Uneven EGTs at full throttle From: "Bill Strahan" 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 _____________________________________ Time: 06:13:23 PM PST US From: IFLYSMODEL@aol.com Subject: Lightning-List: Primer with Bing Carburetor Hey Guys & Gals: Has anyone put a primer on their Jabiru with a Bing carburetor? 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