List of materials

Use Chapter 2 in the plans for a complete list or download my BOM here: BOM (bill of materials)

My BOM gets updated every time I complete a chapter. Notice the 'notes' column - I try to fill in what the item is used for and/or if I changed something from the original plan's BOM.

The original Long-EZ plans were published back in 1980. A lot has changed since then and part of your homework before beginning to build one of these birds is to find out what the latest and greatest materials are. Here, I will list some of the items I selected as 'updates' - take everything with a grain of salt and conduct your own research before applying it to your own BOM.

My major changes to the original BOM:

Epoxy - 
I decided to use Aeropoxy (PR2032 & PH3660). Note however that Aeropoxy is NOT fuel resistant; therefore, Aeropoxy should NOT be used with any surface that comes in contact with fuel. This includes portions of the aft fuselage, center section spar and obviously - the strakes which contain the fuel tanks.

It's been said that EZ-poxy is fuel resistant; however, the manufacturer (Endurance Technologies) does not claim that it is. Instead, they publish charts that show how much weight change of a test article occurs overtime while it is submerged in various types of fuels. In short, one can expect approximately 0.4% weight reduction over a one month period. Does the fuel continue to dissolve the composite after that 30-day period? They wouldn't comment. I haven't done enough homework to conclude what the best course of action is - I will update this section as I get closer to building the fuel tanks.

EZ-poxy comes with a huge health warning label on the container ("DANGER - contains MDA - contains materials which may cause cancer liver toxin"). Aeropoxy does not. For this reason, I am building most of my parts with Aeropoxy and only using EZ-poxy when I have to (i.e., parts that will come in contact with fuel).

Foam -
The plans calls for poly-vinyl boards (type R-250, R-100 and R-45). The 'norm' replacement for this has become Divinycell (H-250, H-100 and H-45). The colors indicated in the plans are irrelevant nowadays, so don't pay attention to those.

Also, note that some of the dimensions indicated in the plans for the foam sheets are no longer valid. Example - the plans calls for two sheets of R-250 that are 26" x 37" x 0.2". If you purchase H-250, chances are you'll only have the option of 24.8" x 27.75" x 0.25" - so you'll need 3 sheets. You'll have to measure out the area you need and see how to best lay them out with the size sheet that is available. While we are on this topic, I should mention that the F28 bulkhead can be made from a single piece using leftover H-250 from the instrument panel (this saves you from having to glue two halves together as page 2-3 in the plans implies).

Actuators - 
I substituted the manual speed brake with an electric linear actuator. I also substituted the manual extend/retract system for the nose gear with an electric linear actuator. Yes it might add a little bit of weight - but modern day Ferrari's come with automatic windows.

Standby... more topics to come...
(last updated - December 2014)