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  1. robcaldwell

    Turnbuckle Safety Wiring Protocol

    What is the protocol when safety wiring a turnbuckle such as this one where the eye of the 2nd half cannot be accessed? I referenced my trusty AC43.13, but this scenario was not addressed.
  2. robcaldwell

    B Model - Rear Seat Belt Attachment Points

    Those of you building a 4 Place B Model, where are you attaching your rear seat belts? I have attachment points for the front seats, not seeing anything for the rear bench seat. I will be using 4 point harnesses.
  3. robcaldwell

    Transponder Antenna Location

    I originally mounted my xpdr and ADSB antennas down the belly along the stringers. After realizing I had almost no ground plane in that configuration, I did some research. I learned that shorter coax runs are better, and forward of comm antennas is better than aft. A few references were made...
  4. robcaldwell

    Level Location for ADAHRS

    Can anyone confirm the floor board between stations B & C is level within 1 degree in straight and level flight? This where I am mounting my Dynon ADAHRS and this is the requirement per the Dynon Installation Guide. (The new Dynon SV-ADAHRS-200 is coupled to a separate SV-MAG-236 Magnetometer...
  5. robcaldwell

    Transponder Antenna Location

    I installed my Comm, ADSB, and Xpder antennas down the belly. The ACK 406 ELT antenna is mounted inside the fuselage per their instructions. All of the other instructions I've read (Comm, ADSB, Xpder) say these locations and installations are appropriate. After reading this thread I'm now...
  6. robcaldwell

    This is worth seeing... (Non Bearhawk)

    Incredible helicopter pilot: https://www.youtube.com/watch?time_continue=104&v=0wPOd7-VezM .
  7. robcaldwell

    Tail Wheels 101 Inspection and Maintenance Webinar

    EAA just posted a really good video on Tail Wheel Inspection & Maintenance. http://go.eaa.org/qjUS0O05Bc0KtZ13E0uY00h
  8. robcaldwell

    Aeromomentum AM20T 260HP

    Today I spoke with Mark Kettering of AeroMomentum aircraft engines http://aeromomentum.com/index.html. Beginning in 2019, they will be offering a completely new 260HP engine for less than $20,000. The AM20T is 4 cylinder liquid cooled, fuel injected, turbo-charged with tune exhaust, ECU (no...
  9. robcaldwell

    Cutting Aluminum

    I like using the Olfa knife along a straight edge. Those cuts are great. I also use a Mini Rotary Shear that I bought from Eastwood. It takes a little "tuning" to get it set up right, but cuts nicely. https://www.eastwood.com/mini-rotary-shear.html
  10. robcaldwell

    Thoughts on my Brake Lines

    Jared Yates stopped by a couple weeks ago to visit my build. He was very helpful and I am fortunate that he lives nearby. One of the items we looked over were my brakes lines. Jared wondered if the loops at the pedals would be an issue. The left looped line could be shortened, I just...
  11. robcaldwell

    Finding Appropriate Cowl Fasteners

    I've seen a few discussions here... But, I have yet to find anywhere the outright detail of the exact fastener combination for a flush mounted cowling screw. I prefer a flush mount vs. pan head. And I understand the benefits of cadmium plated vs. SS AS carries the MS24694 machine screw and...
  12. robcaldwell

    Static Shoulder Harness vs. Inertia Reels

    Is everyone installing inertia reels for their shoulder harnesses (4 Place). If using static shoulder harnesses, are you slacking them to reach the flaps handle / fuel selector? I see that Mark has established a relationship with Hooker Harness for better pricing. Trying to decide what to go...
  13. robcaldwell

    Looking for a Bearhawk Logo Embroidery File

    I am in the process of having my seats covered. I would like to have the following Bearhawk logo stitched into the seat backs. My upholsterer can do this with their computer operated sewing machine. However, there is a CONSIDERABLE cost for the set up. About $250. With only $20 to have each...
  14. robcaldwell

    Foregoing the D Window

    RE: 4 Place... Seems like many, if not most, have opted to change the D window (rear side window) to a more squared version. I'm think I would also prefer a squared style window. My research for examples on how to do this mod did not produce many results. Jared has some good pointers, but...
  15. robcaldwell

    Dot 4 Brake Fluid

    Is this what most are using? About how much to fill an entire system on a 4 Place with both left and right brakes?
  16. robcaldwell

    Brake System Parts List

    I'm sure it's somewhere, I've not been able to locate these in my plans, manuals and Bob book... Do we have a list of parts for the brake system out there? For my 4 Place Quick Build, I need to know the following: - Total bulk length of 1/4" hard lines - Individual lengths of flex lines. - #...
  17. robcaldwell

    Boot Cowl Extension Orientation

    Bob doesn't address this portion of the cowl section in his book. At the bottom between station B & C. In the pictures, I am demonstrating one shot with the precut cowl piece labeled "Boot Cowl Extension" placed over B & C. Aft of C, there are two flared out pieces that do not have an attachment...
  18. robcaldwell

    Name that Fastener!

    I saw these on a Kitfox used to attach polycarbonate to the door. What are these fasteners called? Thanks!
  19. robcaldwell

    Boot Cowl Extension Orientation

    Do I have this Boot Cowl Extension oriented properly? Nothing in the plans or the manuals I have cover this. If I do have this correct, what is used to attached the rear flared portions (see red arrows in the picture). On this same subject, do we have more comprehensive diagrams for the...
  20. robcaldwell

    Airflow Performance November Class

    I just signed up for the Airflow Performance Fuel Injection Systems 101 - Practical Knowledge of the Fuel Injection System - Application to Experimental Aircraft. This is a weekend class, November 2nd - 4th, discussing fuel injection systems for experimental aircraft. My Bearhawk will be powered...
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