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bill(at)repucci.com
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 Posted: Fri Aug 10, 2007 6:24 pm Post subject: Sexy Tractor |
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I just had to share this with everyone.
http://www.vansairforce.com/community/showthread.php?p=146196#post146196
I have to give credit where credit is due, Tad has been using an old garden tractor to pull his -7A in and out of his hangar. However, I do think my is, well, sexy. 
(Click on the picture in that post and you will know what I'm talking about.)
Bill
[quote][b]
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Dale Ensing
Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC
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| Posted: Sat Aug 11, 2007 4:47 am Post subject: Sexy Tractor |
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I don't see a picture.
Dale
do not archive
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Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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bill(at)repucci.com
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| Posted: Sat Aug 11, 2007 4:29 pm Post subject: Sexy Tractor |
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Dale,
Here, try this link: http://www.repucci.com/bill/first%20flight/sexy_tractor.wmv
BTW, the P-mags came back yesterday and I installed them this morning and flew another 2.1 hours today. I've changed my pre-flight procedure to include a full power run-up, after doing a mag check. Four engine starts w/ three flights and so far, so good.
Bill
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Larry Bowen
Joined: 09 Jan 2006
Posts: 802
Location: NC, USA
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| Posted: Sat Aug 11, 2007 4:38 pm Post subject: Sexy Tractor |
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What are the details of the p-mag issue/fix? Will you have p-mags on your next RV?
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Larry Bowen
Larry(at)BowenAero.com (Larry(at)BowenAero.com)
http://BowenAero.com
On 8/11/07, Bill Repucci <bill(at)repucci.com (bill(at)repucci.com)> wrote:[quote] Dale,
Here, try this link: http://www.repucci.com/bill/first%20flight/sexy_tractor.wmv
BTW, the P-mags came back yesterday and I installed them this morning and flew another 2.1 hours today. I've changed my pre-flight procedure to include a full power run-up, after doing a mag check. Four engine starts w/ three flights and so far, so good.
Bill
<snip>
[b]
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Larry Bowen
RV-8 SOLD,
RV-7QB in progress... |
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bill(at)repucci.com
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| Posted: Sat Aug 11, 2007 5:33 pm Post subject: Sexy Tractor |
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Larry (and others),
I wired my P-mags per Bob K's diagram in his AeroElectric book. This is a good logical setup because it allows you to test the P-mags in all failure modes and when you turn the switch off, it both grounds the plugs and pulls the power from the P-mags. The manufacture does not recommend this, rather they would have you just ground the things but keep the electronics alive. This sounds counterintuitive until you realize that the ground only grounds the coil pack and not the electronics.
The P-mag guys had said they didn't like Bob's wiring diagram but never explained why or that something bad would happen, so I wired it per Bob. What I don't like about the manufacture's recommendation is that every so many flights you are to pull the breaker to test them, prior to shut down. This is unacceptable to me as you could get back to your plane in the morning only to find your mags are no longer timed.
What I have done is wired mine per Bob K. and will do a full mag check before each flight but rather than just powering down after checking the mags, I will go to full power to make sure it is running smoothly. (That and keep some timing tools with me at all times.)
Here is what the issue is, as I understand it. On the newer P-mags, they kept the timing mark in non-volatile memory. Upon power up (P-mags, not your engine) the timing mark is read into volatile memory and away you go. When you power them down and back up quickly, you can overwrite the non-volatile memory with a new timing mark based on where the crank is at that time. The P-mag guys issued a mandatory SB in late June but the fix for this was not included. They figured it out just before OSH and didn't notify anyone about it. Since I moved my fuselage to the airport on June 30th, I sent my P-mags off for the upgrade then and the new fix came out afterwards. I sure wish I had known about it prior to last weekend.
Would I recommend them, absolutely! They have been VERY responsive to all issues and I still believe in this product. They are a small company and as such, I can understand them missing an occasional communication. However, I hope it doesn't happen again.
These P-mags are going to spoil me. My O-290 was last overhauled in '59 and put in storage. I just topped it (inspecting it for rust while I had the cylinders off. There was no rust.), hung it on the -9, and took it to the airport. Oh, I did install a yellow tagged carb so I knew that was good. This thing started on the third prop blade and has done so every time I hit the starter. That is all because of the P-mags. It starts more like a car than an airplane. Hit the button and it lights right off.
Bill
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Steve Glasgow
Joined: 10 Jan 2006
Posts: 674
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| Posted: Sun Aug 12, 2007 12:48 am Post subject: Sexy Tractor |
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Bill what was the problem with the P Mags? What is your full power static RPM?
Cappy
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Steve Glasgow-Cappy
Cappy's Toy
RV-8 N123SG |
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Steve Glasgow
Joined: 10 Jan 2006
Posts: 674
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| Posted: Sun Aug 12, 2007 1:03 am Post subject: Sexy Tractor |
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Bill, why the full power check during engine run-up? Don't you do a full power check on every takeoff anyway? If she is not running right during initial takeoff, just abort.
Cappy
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Steve Glasgow-Cappy
Cappy's Toy
RV-8 N123SG |
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bill(at)repucci.com
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| Posted: Sun Aug 12, 2007 3:49 am Post subject: Sexy Tractor |
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Cappy,
Because I'm new to this engine and airplane, I did make one takeoff with the mags miss-firing and didn't notice it. Big Duh on my part but all is good. The run-up after the mag check is just another way to make sure all is good.
Bill
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