MT 15" spinner clearance

Previously I measured and posted the distances from the spinner to the crank flange for the MT-12-B. The issue with the previous post was that I had assumed that the MT-12-B came with a 15" spinner to fit my showplanes cowl. Once I started to fit things I noticed that the diameters did not add up and the mistake was that the "default" when you order a 12-B prop is that it comes with a P-469-1 spinner. The correct part number for the 15" spinner is P-285-1-A. Also, because I special ordered mine as Matte Black, this is a no-stock item. :(

The difference is significant!


The new clearance measurement are inline with the trusty internet posts.
 

I have my starter ring gear off for the cowl fit/installation and I also took the spinner to cowl gap out of the mockup plate distance rather than putting spacers on the cowl. For my records here is my horrible hand writing tracking the crank flange to spinner distance. I may increase this gap to more than 1/8" but for now here is my mockup target number:

Vertical Power

I was about to place a digi-key order a couple of weeks ago in order to buy the molex crimper for the vertical power molex connectors when I came across a document on the vertical power website that stated Vertical Power has molex (professional series) crimpers available for free rental. I figured it was one of those marketing lines that when you try to actually contact them they either ignore you or tell you that they don't have anything available.

To my surprise I was completely wrong. They shipped the crimper out the day after I contacted them, and here I am 1 week later with all of my connectors done!

March Status Photos

I have spent a good amount of time getting my panel console fitted. Everything for the most part goes right in, but there are minor cosmetic tweaks and fitting that does need to happen. It is good to see the panel looking like a panel!


As of now, I have the VPX, GTR-20, GSU primary and backup, GEA24 and the AUX fuse block mounted.


Looking back I have a mess!


The engine is coming together nicely. I got my exhaust from Vetterman and they did a wonderful job.


I have the doors complete, but I am waiting on the weather to warm up a bit before I finish cutting my plexi-glass.


Side view






I did notice that the desiccant on a couple of cylinders was starting to go clear. I replaced all of the desiccant in the plug adapters just to get ahead of that.



I have Beringer nosewheel and mains. I am waiting on the weather to warm to finishing dura-coating some of the wheel components.




I have spent a lot of time going through this door. My neighbor caught me the other day in the tail of the plane and I told them that I would be out in a minute because I was a little stuck at that point in time. They responded with "Looks like you should have built it a little bigger." If only it was that easy.

GSU-25

I have a lot of catching up to do in terms of blogging. I hope to sit down and convert some of my work logs and photos to blog posts over the next couple of days. I will start with this post as a warning. The GSU-25 has a non-symmetric footprint! Yesterday I build a doubler for mounting both of my GSU-25s (primary and backup) in the common spot on the far left hand side of the mid-panel. I test fit the GSU-25s to the doubler and proceeded to rivet the doubler to the mid-panel.



I was intending to install the GSUs to the panel with the d-sub connections closes to the ground however when I went to bolt them in place (after I had everything riveted together the bolt holes did not line up. The holes were at least an 1/8" off. I spent a good 5 minutes trying to figure out how riveting the doubler in place deformed the layout that significantly. However, when I rotated the assembly 180 degrees everything was perfect on both GSUs. A quick glance at the mechanical drawing confirms it. The whole pattern is in fact not symmetric. In thinking about it, that was probably done on purpose such that if the LRU ever needed to be serviced or replaced that it could only be re-installed in the orientation that it was previously installed in.


Because Garmin accepts basically every install orientation (with a software configuration setting), I am going to keep this as is (upside down for me), and move on to the GTR-20 installation.

Wiring Diagram

My wiring diagram is coming along and I am feeling pretty stable on the overall plan now. I am going to go with a 2 battery approach so I can have a master and aux. The ignitions connected to the master_battery_bus and aux_battery_bus. The aux bus will feed the backup power on my avionics while the master bus will feed the main_bus. The aux bus will get it's power through a diode connected to the master bus. I cannot recall what exact AeroElectric diagram this is, but I think it is a hybrid between Z14 and Z19 if I recall correctly.




I have made decent progress on building the "Garmin" and "VPX" eagle library. I still have a bunch of components to add, but I am doing them one at a time as I add the component to my electrical diagram.

Send me an email if you want me to send you the LBR with the Garmin and VPX components.

Door latches

I need to come back here and do the write-up, but here is my page to document my Plane Around 180 kit and AeroSport low profile door handle install.

Rear Accessory Shelves

As I was planning my electrical system I realized that I needed some additional space behind the rear bulkhead for my E-bus, battery bus, and additional contactor. I remember seeing a PDF from TCW regarding the dimensions for a rear shelf, and having worked through a couple of designs, the tray layout from TCW was pretty much what I wanted.

I started the process by cutting the shelfs out of .063 6160 and bending the two edges down for stability. I ended up bending my down rather than up (well I guess I ended up doing exactly what TCW did, but I installed my flipped upside down)




Not that I would recommend you go out and buy a harbor freight brake (because I hate Harbor Freight), I will say that for $40 dollars being able to form a no-fuss perfect 90 degree bend in 15 inches of .063 is pretty cool.




The one thing that TCW did that I really did not want to do was they built their shelf by cutting their j-channel and unrolling it. Rather than severing the j-channel, I but a slight brake on a piece of .063 to account for the wall angle and bring a mounting plate onto the same plane as the shelf. This was a bit annoying to drill, but with a mirror and a right angle drill this was more than doable. Before deciding to go down this path, I debated how to rivet this for quite some time, Then I realized I still have that alligator crimper that I  bought off of ebay. The alligator crimper makes short work of this angle/orientation.



I still need to build a wedge and install some nut plates because the j-channel is not in the same plane as the battery box. That will be pretty straight forward though. (also, good use for those truck mats that I took out of my truck day 1!)