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    Bicycles, aircraft, and all things technical
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    1967 m20e

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  1. Glad this is an easy one..... one mechanic indicated that the system is designed to be under pressure, but NA we are pulling vacuum and the fluctuation is the motor calling for fuel? To answer some other questions The rayjay system includes a special fuel pump which has a reference line to the airbox. The original fuel pressure gage is the one I am referring to and it is still in the green 14psi is the min. Until recently, I have not seen this fluctuation, so I am looking for reasons why I am seeing this change before I dismiss it.
  2. Recently, I have been seeing an intermittent fluctuation in a rayjay turbo fuel pump. It is fluctuating from 20-24 psi and does it at altitude with the turbo disengaged (normally aspirated). The aux pump adds 2-3 psi and fuel flow on the G3 appears to be holding steady at 10gph at 10.5k. We have recently sealed up the intake box and replaced the rsa servo for our io360a1a 200 hp engine. My mechanics and others have told me not to worry about it, but it somehow doesn't seem right to me. No blue leakage out of the pump drain at all, and the pump is about 10yrs since overhaul. There is a pressure line from the air box to the pump; could that be leaking and causing this? Or is this normal when I have a sealed system? I am not noticing any fluctuation when flying below 9k normally aspirated, so I don't think I have an air leak in a fuel line. Any help with this would be appreciated.
  3. I have a m20e with the rayjay turbo normalizer and the same intake system and filter. I have seen oil from a new filter do exactly what you are speaking about. Often I have a stickey coating of filter oil underneath the intake airbox on the bottom cowling. I would verify the oil type before making yourself crazy.
  4. In my experience,cases or bags to be difficult in getting around the seats, so try not to use them. I have found a couple of items are really helpful instead. 1. Wheelbags-https://www.amazon.com/VCYCLE-Cycling-Wheelset-Waterproof-Bicycle/dp/B0739Z8FLF/ref=sr_1_1_sspa?crid=3BZMYR8285EY7&dchild=1&keywords=bicycle+wheel+bags&qid=1616809889&sprefix=bicycle+wheel+bags%2Caps%2C248&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExU05BV1g4WlEzOUtEJmVuY3J5cHRlZElkPUEwMjY4MTkxMlcyOTJCRDZUNFFaNyZlbmNyeXB0ZWRBZElkPUExMDIwMzg0MldYSVkyMVQyM0VGSSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU= 2. chain sleeve- https://www.amazon.com/White-Lightning-Chain-Johnny-Black/dp/B007FWDODQ/ref=sr_1_3?dchild=1&keywords=bicycle+chain+cover&qid=1616810206&sr=8-3 3. A foldable bike is certainly the best option of ease of getting them in, and for packing. I have modified normal bicycles to fold using these and they work great. http://www.sandsmachine.com/
  5. The rear seat back is attached with 4 bolts. The two bottom ones are a little hard to get to. Piperpainter had a nice write up of a fold down modification for a C several years ago. I think it is still on here? My previous owner had done a modification similar to that.
  6. If you remove or fold down the rear seat you should be able to fit two. I have gone all over the west with bicycles in my E model. I live in Denver, so Moab, Custer, and the tetons are all doable for a day trip with a buddy. Riding in cool places is one of the best perks about owning a plane. Instead of a 100 dollar hamburger its a two hundred dollar ride:)
  7. It does work on an E, we just did it. Perhaps you may find this useful, we placed 2x4s under the tires to not have to draw the jacks so far down to the floor. It also allowed us to manipulate the shaft and bolt into place by using a bit of leverage.
  8. Just replaced mine, 55" worked in my 67 e model. The price is outrageous, but when you compare the price of a new terminal kit is makes better sense. https://www.aircraftspruce.com/catalog/eppages/hightensioncable3.php
  9. BaldEagle, your description regarding the brightness reduces the noise, thanks for the information. Included is a pick of the unit.
  10. Thanks for responding, I will try to get a picture over the weekend. I know the large braided shielding over the harness is in place, I will look for the ground to the instrument panel. Additionally, the installer grounded the shield of the wire that goes to the audio panel at the aspen per the wire diagram outlined by Aspen.
  11. Thanks for the info. What you indicate improves the problem, makes sense in my case. I did notice that the noise changes especially when my hand was on in front of the unit. Is this a known issue with Aspen? Did they push back when you discussed sending it back?
  12. I thought I would bring this up again, because I am having some audio noise following the upgrade to the max. As soon as the unit powers up, I am getting a quite loud audio hum when the plane is running. Is this similar to what you saw? and did a new unit resolve the problem? To my knowledge, they followed the install spec when the additional wire was connected to the audio panel.
  13. We had a similar situation and we found a turbo hose was leaking/loose at the fitting near the scavenge pump. From what I understand, we believe this was causing oil to pool at the turbo and made its way out the pipe.
  14. Adhesive backed Velcro tape attaches the foam to the floor. The foam was the insulation type with an adhesive side on it, I believe that I had to cut them to size but it has been a while since it was done. A coupe of years of use, and they have not come loose.
  15. I installed the thinner/lighter style carpet from SCS and the install process is fairly easy. All the pieces are pre cut and fit well in our 67E. The velco install system works pretty well. I also got the foam backing and would suggest backing with something because the carpet is really thin and the foam definitely helps with sound. Better than custom wool? No, but looks ok and I will say holds up ok, but would probably go with the thicker option if I did it again.
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