Wednesday, December 31, 2014

CNC Drilling and Cutting Fuselage Boom

Building The EMG-6 (CNC Drilling and Cutting Fuselage Boom) 

We've recently started working on the kits for the fuselage boom. The majority of the fuselage boom is built from 2024 T3 aluminum .040" thick and all the components are CNC cut on the CNC router and bent using the CNC press brake. Using the CNC router to cut sheet metal and drill it is not the most efficient method, but provides us a cost-effective method to produce the parts with CNC accuracy. There are a total of 5 different sheet-metal patterns that produce parts from 4 x 8 sheets. Each sheet has from between 6 to 20 different toolpaths. In the video which is all time lapse photography it happens quickly but in reality each sheet requires between 3 to 5 hours of drilling and cutting time. The sequence of events requires drilling 4 locations on the sheet that gets screwed to the MDF tabletop. Then the drilling proceeds to drill all of the locations on the sheet that are required to hold down small parts or hold the perimeter of the fixture while the cutting is being completed. This is usually between 100 and 200 holes all of which have to be screwed to the tabletop manually. the next step is the remaining holes need to be drilled where rivets will be placed during construction. Depending on the sheet this will usually be between an additional 800 to1000 drill holes. The next steps are 2 to 3 different toolpath cutting out the interior components such as lightning holes. Failure to have a screw in each one of the small components can oftentimes lead to that part flipping up and jamming the CNC router or breaking a cutting tool. Next all of the exterior components are cut and then we follow up with the detail work of cutting the small components. Then all of the screws are removed from the components and stacked and organized ready for bending. The tabletop is then cleaned and the next sheet is put in place for the next series of parts. After 5 sheets have been cut on the MDF tabletop the surface is destroyed from the router and drill bits cutting .125 inch into the MDF that the entire tabletop has to be resurfaced and an additional 5 sheets can then be cut. After 20 sheets are cut the MDF sacrificial tabletop has to be replaced and the process can be repeated again.

Tuesday, December 30, 2014

53-10-09-72 Passenger Rudder Pedal Tube Installation (Video)

Building The EMG-6 (53-10-09-72 Passenger Rudder Pedal Tube Installation) 

In this episode of building the EMG_6 We install the Passenger Rudder Pedal support tube for the fuselage frame

53-10-09-71 Seat To Gear Box Tube (Video)

Building The EMG-6 (53-10-09-71 Seat To Gear Box Tube) 

In this episode of building the EMG_6 We install the Seat To Gear Box tube for the fuselage frame

Sunday, December 28, 2014

53-10-09.100 Brake Mount Tube (Video)

Building The EMG-6 (53-10-09.100 Brake Mount Tube) 

In this episode of building the EMG_6 We install the brake mount tube for the fuselage frame

Saturday, December 27, 2014

51-60-10 Bushing Holder (Video)

Building The EMG-6 (51-60-10 Bushing Holder) 

In this episode of building the EMG_6 we go behind the scenes to see how we manufacture one of the EMG-6 parts from start to finish. Follow along as we design and manufacture (P/N 51-60-10 bushing holder) using solid works and solid cam software and then cut and machine this integral part on the EMG-6

Wednesday, December 24, 2014

GT 500 Tow Plane Flight Test Excerpt

GT 500 Tow Plane Flight Test Excerpt 

This is the 1st 10 minutes of an hour-long flight test on the GT500 tow plane that we have set up to be used for towing the EMG-6 electric motor glider.

Tuesday, December 9, 2014

EMG 6 Flight on Google Earth Overlay

EMG 6 Flight on Google Earth Overlay 

This is test flight number 55 and 56 from a little different perspective. We have overlaid the flight video with the .kml  file from the Ascent flight data recorder output to Google earth.

EMG-6 / GT-500 Tow System Testing Tow release handle

EMG-6 / GT-500 Tow System Testing Tow release handle 

In this video we test the second-generation tow release handle on the GT-500 Tow plane.

Monday, December 8, 2014

EMG-6 / GT-500 Tow System Testing

EMG-6 / GT-500 Tow System Testing 

Another video in the series Building the EMG-6. In this episode we experience a design failure in GT-500 Tow Plane during Tow Release testing.

Sunday, December 7, 2014

53-10-05A Landing Gear Box Assembly (Video)

53-10-05A Landing Gear Box Assembly

This is another episode in the Building The EMG-6 Series. In this episode we show how to attach the landing Gear Box to the rest of the fuselage frame.