Before start, the differing pump "jack hammer" sound also lets you know whether the fuel valve is off or on.
And that time could be 6 months or 6 years - and the next guy that owns the aircraft will not know what happened or why....
Mounting the pump to some type of vibration system may seem like a simple minor modification, but I would argue that it is not.
If the mod was doing any good, it would likely be allowing the pump to move... so as to reduce the vibration that it was able to induce in the airframe.
The bad thing about that is you would then have a fuel pump that moves, with solid fuel lines attached to it. that are meant not to.
It doesn't take a lot of imagination to guess what might probably happen after some time in operation. ...
Initial thought that comes to mind is why? Since it has already been discussed that with the engine running it can't be heard anyway.
The left one was installed in 2015 part number 40105, the one on the right is the new higher pressure pump 40135. Hard to tell the difference.
View attachment 11451
I am wondering if the calculation for fuel use will change. More pressure should mean more volume. We have only one flow sensor reading the total fuel pumped.
Does anyone know the difference between 40106 (not 105) and 40135? The original is 40105 (lower pressure) and both the 105's and 106's are stock at aircraft spruce but not 40135's.
Here is the tech info on all of them, very close in detail and appears 106 and 135 are the same specs.
https://www.facet-purolator.com/tech-information/
Maybe the connector on the positive lead?
The 135 comes with the “packard” connector which is a male spade connector in an odd plastic housing. I had to cut it off and add a female spade to match up with the plane harness. It looks like the 106 doesn’t have a connector, just bare stripped wire.
Potato - Potatoe..
Haha... I bet way more than half here have no idea what you're talking about..I didn't know Danny Quayle owned a RV-12...