I Have the Pinapple Racing Alternator mount. I'm using it to hold a Denso Mini alternator, one of those 1 wire jobs you see on ebai.
I also have a Fred Breese engine mount...(what ever happened to Fred?) so I had to bend the Pineapple mount up a bit to let the alternator clear the mount. I thought I had bent it a little crooked, until you mentioned that the belt runs crooked....
I have about 5 hours of ground running time. I don't notice any alternator vibration, however, I locked the alternator down fairly well with two top brackets. These alternators only have two mount ears, both at the front, near the pulley end. I was worried about that (loose...essentially the same thing as vibration) so I added a second top mount, the slotted arms that you loosen to pull the alternator while tightening the belt. So I have an alternator adjusting bracket on the forward and aft end of the top alternator bracket, and it seems to hold the alternator enough to prevent vibration. I used shims to align the alternator bracket with the engine pully.
I don't really like the bottom mount of the pineapple racing alternator mount, as it seems to be a bit light at the stress point. I'm sure it's mild steel, so if there is a problem, I'll add a little material or whatever. I just think it's a great starting point, but not perfect for our use.
-----Original Message-----
From: Scott <squiggles@yahoo.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, Jul 12, 2011 6:46 pm
Subject: [FlyRotary] Re: pineapple racing alternator bracket
I only have a couple of hours of run time, so no observations on if it will stay true with the other pulley's. I did center it as best I could using washers as spacers.
As you can see in the video( well at least as best the camera's rolling shutter or whatever it uses )
http://www.youtube.com/watch?v=z4RMZwJe2_0
the vibrations are what caught my interest. I am going to secure it to the engine block engine mount I have near there, but haven't really given much thought as to what it will finally look like. Hence the question if this was unique to my engine like maybe it was too soft of rubber for the engine mounts, but since you mentioned you noted the wiggle/jiggle as well it is likely the design even if it is 1/4" steel.
--- On Tue, 7/12/11, Chris Barber <cbarber@texasattorney.net> wrote:
From: Chris Barber <cbarber@texasattorney.net>
Subject: [FlyRotary] Re: pineapple racing alternator bracket
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Date: Tuesday, July 12, 2011, 12:54 AM
I removed it and relocated a smaller second alternator using the original vacuum pump mount and location. I am currently using the original A/C bracket with some modifications to mount the A/C that I have installed.. The Pineapple bracket did seem to vibrate a bit and seemed to line the alternator belt slightly out of true. The pineapple bracket I have was purchased by my friend David Staten (who monitors and post on occasion). I think he would not mind selling it if someone is interested. The bracket may be fine as it is but I may want to brace it a bit.
Chris Barber
Houston
| There were a few out there who had used the pineapple alternator relocating bracket while they made them...
If you are out there and noted the vibration characteristics it would be helpful if you could share your experience.
Thank You.
-Scott
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