1f - Release Mechanisms
Required for Solo: 61.87(i)(1)
Required for Private: PTS II(C)
Lesson Objective
The instructor will teach the student/candidate the function of the tow release, including the differences in the Schweizer and Tost release mechanisms
Regulatory Requirement
- Pre-solo pilot: §61.87(i)(1)
- Private Pilot Test Candidate PTS II-C
Content
- Nose hook/CG hook
- Schweizer release
- Tost release
- Back-release function of CG hooks
- Maximum and Minimum towline strengths
- Use of weak links (towplane end, glider end)
- Hazards of hooking Tost rings onto Schweizer hooks
- POH maximum line strength vs the 200% rule
Completion Standards
The student must be able to:
- Calculate the appropriate towline strengths
- Describe the proper use of weak links
- Recognize the correct usage of Schweizer or Tost rings for the appropriate aircraft
- Recognize the correct engagement of the Schweizer tow hook for Schweizer aircraft
Prerequisite Study
- Glider Flying Handbook (2024), Chapter 6, Page 6-4 to 6-7
- Glider Flying Handbook (2024), Chapter 7, Page 7-17, figure 7-17
- 14 CFR § 91.309 Towing: Gliders and unpowered ultralight vehicles.