October “Shop Notes”
October 11, 2015, Light Sport Repairman Maintenance Class
October 5, 2015 Dope And the Fabric Cover Design For Ailerons Completed
The primary spar for the ailerons is manufactured from 1.5″ x .035 6061 T6 aluminum tube.
Because of the length of the tube it will be spliced at about the 75% station.
The ribs will be attached to the structure with CCP-4-2 stainless steel rivets
This type of construction will allow for a much cleaner lower drag profile.
We have calculated that we will sacrifice about 1.2 pounds by going to this design.
Now that we have completed the design work we need to make drawings for each one of the parts and as soon as those are completed we will post them on the builders database.
October 2, 2015 Meeting with RND (Electric Motor Development)
We continue to see progress around the new electric motor that is being developed by RND. Ed Donovan owner of RND (Shown on the right) flew his Cessna 206, up from Lancaster today and brought his director of marketing and one of his engineers along to discuss some of the aspects of the new electric motor development.
And NO! I still can’t share any of the pictures or details about the motor at this point in time. Suffice it to say, though, It Is Awesome!!!. We were able to take a look at the motor in position on the aircraft and get some better ideas about how it’s going to look. We will be receiving some solid works files so that we can do some additional 3-D modeling of the new motor. We also sent four sets of propeller blades home with them for testing purposes.
I can tell you that the motor is designed for 20 hp continuous power output and is being designed with efficiencies in excess of 97%.
The motor is being built in conjunction with another company that is working on the controller system and there is a lot of proprietary information that cannot be made public at this point in time.
Over the next couple of months we will be designing some motor mount and fairing systems and looking at using the new motor as a twin engine configuration for the aircraft as well.
We are very excited about the possibilities of this motor being a commercially viable plug-and-play system for not only the EMG-6. But other aircraft as well. I will let you all be informed of any new information as soon as I am permitted to provide it.
October 1, 2015 Covering the Wings
In this picture here we are installing an inspection ring for future cut out and access for maintenance or inspection.
In this picture here we can see that the wing only requires two inspection locations, one at the outboard aileron hinge location on the lower aft section of the wing and one additional inspection cover on the lower trailing edge section of the wing near the wing lift struts.
The Dacron sailcloth (ultralight) covering will be removed and the vertical stabilizer covered with the Stitts poly fiber process like we’re doing with the wings.
The rudder, elevator, and ailerons will be getting the upgrade to the low drag version of the flight control system using the Stitts poly fiber process as well.
We are beginning the covering process on the right wing now and in this picture here we are starting on the bottom surface once again, and continuing the same process that we accomplished on the left wing.
This provides a very large adhesion area.
The fabric is also left long enough so that it can conform to the wing tip bow all the way from the trailing edge fairing tube to the wing tip bow.
We don’t glue to any of the ribs or intermediate components. This will allow the fabric to shrink uniformly without distorting any of the rib tubes that are floating in between the spars.
The fabric is wrapped 180° around the spar and the seam is on the bottom side of the fabric.
With a little bit of technique and shrinking of the fabric prior to gluing in strategic areas we can achieve a very clean, smooth wing tip.
In this picture we have both top and bottom fabric installed and are getting ready for the attachment of some of the finishing tapes.
In this picture here we are shrinking the fabric on both the top and bottom surfaces, and applying the final 350° stabilizing pass.
More finishing in reinforcing tapes located around both the bolts that penetrate the spar tubes as well as reinforcement for areas where bolts are located just under the fabric to provide where protection over time.
The reinforcing tape’s are a adhesive backed 3/8 inch wide, heavy-duty tape that will transfer the loads from the wing skins to the ribs.
The tapes are applied and then holes are made through the reinforcing tape with a hot soldering iron tip and then 4-2 aluminum pop rivets are installed over the reinforcing tape into the aluminum rib tube.
The poly spray is normally sprayed onto the fabric. However our spray booth is not set up and will take a couple of days to get it set up so we are going to simply brush on the first two coats and will spray the remaining coats.
Kristian Is one of our helpers in the shop that works on a regular basis doing miscellaneous odds and ends.