This is my supplemental builders blog for a Cozy Mark IV which is a 4-seat, single engine, homebuilt light aircraft designed by Nat Puffer, with parts and plans supplied by Aircraft Spruce & Specialty Co. The aircraft is built from plans using basic raw materials. It is not a kit aircraft, though many small parts are available prefabricated. The Cozy is similar in design and construction to the 2-seat Rutan Long-EZ, from which it is derived, with approval from Burt Rutan.
Pages
Chapters (Blogger Labels)
- Chapter 01 Description and Introduction
- Chapter 02 Bill of Materials
- Chapter 03 Education
- Chapter 04 Fuselage Bulkheads
- Chapter 05 Fuselage Sides
- Chapter 06 Fuselage Assembly
- Chapter 07 Fuselage Exterior
- Chapter 08 Head Rest and Seat Belts
- Chapter 09 Main Gear & Landing Brake
- Chapter 10 Canard
- Chapter 11 Elevators
- Chapter 12 Canard Installation
- Chapter 13 Nose - Nose Gear & Brakes
- Chapter 14 Center Section Spar
- Chapter 15 Firewall
- Chapter 16 Control System
- Chapter 17 Pitch and Roll Trim
- Chapter 18 - Canopy
- Chapter 19 - Wings/Ailerons/Attach
- Chapter 20 - Winglets & Rudders
- Chapter 21 - Strakes
- Chapter 22 Electrical System
- Chapter 23 - Engine Installation
- Chapter 24 Armrests Seats Fairings
- Chapter 25 - Finishing
- Chapter 26 Upholstery
- Cozy Builders
- EAA
- FAA
- Flight Testing
- Landing Brake and Center Console
- M Drawings
- Maintenance
- mods
- Skunk Works
- Trip reports
- Wheel Pants
Tuesday, February 19, 2019
Chapter 22 - AC versus DC switches/ Documentation
Del City has some overstock toggle switches rated at 20 Amp AC for $.64 each. I recalled that DC switches were often constructed differently than AC switches and found this informative article explaining the differences:
Switch Reference (An EATON training document hosted on the aerolectric.com site)
"DC CAPABILITY OF AC SWITCHES
It is important to also note that many AC rated switches can be used in applications where less than 30V DC is required, provided current does not exceed the full current 125V AC rating of the switch. In general, the 125V AC rating would be equivalent to the 28V DC rating."
The article is well worth reading. Anyway, most of the switches I have will be used on low current resistive loads so isn't a factor.
I spent a good part of the day organizing a sizable pile of documentation for the engine, air fame & prop logs. Binders were filled with specific information for modifications not in the plans such as the rudder pedals, site gauges, capacitive fuel probes, electric nose lift, hidden rudder bell horns, fuel injection, electronic ignition and quite a bit more. This task was initiated because I was looking for information on the alternators and this turned into another rabbit hole, probably worthy of a separate blog entry sometime in the future.
I'll print out nice binder labels before the DAR inspection for the binders to replace the temporary sticker labels. I still have a small pile of unique items that has documentation that will be needed someday. Probably three more binders for avionics and electrical system will be added to these. The small EAA Airframe log doesn't seem large enough to record everything.
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Relevant links for supplies and other info
- Cozy IV Specs
- Cozy Builders - Google Groups
- Unofficial Cozy Builders Site - updates to plans and much more information (maintained by Marc Zeitlan)
- Cozy Builders Mailing List, POH and other info
- Cozy Builders - Map
- Official Cozy Aircraft Site (outdated site)
- Canard Zone
- Central States Association - Facebook
- COBA Canard Owner and Builder Association
- Builder Sites (maintained by Erland Moen)
- Experimental Aircraft Association
- Rutan Aircraft Flying Museam
- Dennis Butler's Grand Champion
- aerocomposites.aero - Gear legs and fiberglass parts
- Aircraft Spruce Cozy IV Parts
- http://www.wicksaircraft.com/index.html
- 3:23 Composites
- SDS EI EFI
- Cozy Girrrls
- Skycraft Surplus
- www.enginegearonline.com/
- Infinity Aerospace
- NIck's web site
- https://www.stuarthose.com/
- http://www.tostenmfg.com/
- www.eurekacnc.com
- Featherlite (http://aerocad.com) parts
- http://aeroelectric.com/
- www.long-ez.com/
- Earl's Performance Fuel Systems
- FAA Amateur Built Operating Limitations
- FreeFlight Composites
- ADS-B blocking
- FAA - A&P / Experimental Builder Experience
- EZ.ORG moved to ez.canardaircraft.com
- Fiberglass Warehouse
- High Temp Epoxy
- Marc's Nose Gear parts
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