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Main belt back side idler
Location: West Plains Missouri
Certificates: A&P/CFI helicopter
Orv Neisingh Offline Content Creator
Rotorway Guru
Posts: 115
Threads: 36
Joined: Jan 2026
Reputation: 17
#1
07-18-2026, 03:53 AM
When you back the power off for an approach or practice auto the main belts will oscillate wildly and will slap against the frame tube. Check your frame tubes for black rubber transfer from the belts. Adding a back side idler will keep the belts running true without contacting the frame. Here are some examples.

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Messages In This Thread
Main belt back side idler - by Orv Neisingh - 07-18-2026, 03:53 AM
RE: Main belt back side idler - by Geno Mancini - 07-18-2026, 02:01 PM
RE: Main belt back side idler - by Orv Neisingh - 07-18-2026, 04:33 PM
RE: Main belt back side idler - by Lyle Swallows - 07-19-2026, 01:16 AM
RE: Main belt back side idler - by Orv Neisingh - 07-19-2026, 01:21 PM

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