Franklin 6V-335 series
29 aircraft on the U.S. register carry a Franklin 6V-335 series engine, rated at about 200 horsepower. The Hiller UH-12 is the model most often fitted with it (13 aircraft). The aircraft carrying it were built between 1947 and 2011.
The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Franklin 6V-335 series. FAA spelling: 6V-335 SERIES.
Fitted to model families
Hiller UH-1213Bell 478Hiller OH-232Bd Helo Enterprises Llc CUERVO-6H11Hiller - World Helicopters UH-12C1Hiller-Felt UH-12C1Hiller-Tri-Plex Ind.Inc. UH-12B1Panzl B H/Panzl C J PAN1Robert Richardson CUERVO-6H11
Model families, as a table
| aircraft | |
|---|---|
| Hiller UH-12 | 13 |
| Bell 47 | 8 |
| Hiller OH-23 | 2 |
| Bd Helo Enterprises Llc CUERVO-6H1 | 1 |
| Hiller - World Helicopters UH-12C | 1 |
| Hiller-Felt UH-12C | 1 |
| Hiller-Tri-Plex Ind.Inc. UH-12B | 1 |
| Panzl B H/Panzl C J PAN | 1 |
| Robert Richardson CUERVO-6H1 | 1 |
Hiller UH-12 · Bell 47 · Hiller OH-23 · Bd Helo Enterprises Llc CUERVO-6H1 · Hiller - World Helicopters UH-12C · Hiller-Felt UH-12C · Hiller-Tri-Plex Ind.Inc. UH-12B · Panzl B H/Panzl C J PAN · Robert Richardson CUERVO-6H1
Where they are owner's state
Kind of aircraft
By kind, as a table
| aircraft | share | |
|---|---|---|
| Helicopters | 28 | 97% |
| Piston singles | 1 | 3% |
Connections how this engine series links to the rest of the register
Fitted to
- Hiller UH-12 13 with this engine series
- Bell 47 8 with this engine series
- Hiller OH-23 2 with this engine series
Where they are
- Michigan 3 of these aircraft
- Texas 2 of these aircraft
- Pennsylvania 2 of these aircraft
- Oklahoma 2 of these aircraft
- Ohio 2 of these aircraft
Biggest operators
- Taz Air Service INC 1 of these aircraft
- Continental Title Trust LLC Trustee 1 of these aircraft
Analytics
The whole map of how records connect · these connections as data: /graph/engine/franklin-6v-335-series.json.
Aircraft newest certificates first · 29
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N5025J | Hiller UH-12B |
Rotorcraft | Individual owner Oklahoma |
Standard | 2026-05-24 | ValidFAA registration status code V: Valid registration. All codes |
| N1348P | Hiller UH-12C |
Rotorcraft | Individual owner Iowa |
Standard | 2026-05-13 | ValidFAA registration status code V: Valid registration. All codes |
| N147CG | Bell 47G |
Rotorcraft | Magic Carpet Ride Aviation LLC Columbus, Ohio |
Standard | 2026-01-10 | ValidFAA registration status code V: Valid registration. All codes |
| N1048P | Hiller-Tri-Plex Ind.Inc. UH-12B |
Rotorcraft | Aviation Solution Experts LLC St Marys, Iowa |
Standard | 2025-10-22 | ValidFAA registration status code V: Valid registration. All codes |
| N2801B | Bell 47G |
Rotorcraft | Taz Air Service INC Middletown, Delaware |
Standard | 2024-12-30 | ValidFAA registration status code V: Valid registration. All codes |
| N1023G | Hiller UH-12B |
Rotorcraft | Continental Title Trust LLC Trustee Wichita, Kansas |
Experimental | 2024-11-18 | ValidFAA registration status code V: Valid registration. All codes |
| N11ZL | Panzl B H/Panzl C J PAN |
Fixed-wing, single engine | Individual owner Oklahoma |
Experimental | 2024-02-27 | ValidFAA registration status code V: Valid registration. All codes |
| N9019T | Hiller UH-12B |
Rotorcraft | Individual owner Tennessee |
Standard | 2023-02-10 | ValidFAA registration status code V: Valid registration. All codes |
| N8178H | Hiller UH-12A |
Rotorcraft | Rotor Wing Nuts LLC Kansas City, Missouri |
Standard | 2022-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N252LG | Hiller OH-23C |
Rotorcraft | Alaska Army Aviation Museum INC Big Lake, Alaska |
Standard | 2021-05-25 | ValidFAA registration status code V: Valid registration. All codes |
| N900JR | Hiller UH-12B |
Rotorcraft | Individual owner Washington |
Standard | 2019-06-06 | ValidFAA registration status code V: Valid registration. All codes |
| N552DR | Hiller - World Helicopters UH-12C |
Rotorcraft | Individual owner Indiana |
Standard | 2016-04-12 | ValidFAA registration status code V: Valid registration. All codes |
| N3877L | Hiller UH-12B |
Rotorcraft | Individual owner New Mexico |
Standard | 2015-08-03 | ValidFAA registration status code V: Valid registration. All codes |
| N7AR | Bell 47G |
Rotorcraft | Aircraft Sales LLC Caledonia, Michigan |
Standard | 2015-02-02 | ValidFAA registration status code V: Valid registration. All codes |
| N132BR | Bell 47D1 |
Rotorcraft | Individual owner Pennsylvania |
Standard | 2014-08-19 | ValidFAA registration status code V: Valid registration. All codes |
| N17129 | Hiller OH-23B |
Rotorcraft | Individual owner Ohio |
Standard | 2014-05-08 | ValidFAA registration status code V: Valid registration. All codes |
| N547SB | Bell 47G |
Rotorcraft | Individual owner Missouri |
Standard | 2013-09-24 | ValidFAA registration status code V: Valid registration. All codes |
| N555EN | Bell 47D1 |
Rotorcraft | Individual owner Pennsylvania |
Standard | 2013-03-04 | ValidFAA registration status code V: Valid registration. All codes |
| N1348X | Hiller UH-12C |
Rotorcraft | Individual owner Texas |
Standard | 2012-09-25 | ValidFAA registration status code V: Valid registration. All codes |
| N461KB | Bd Helo Enterprises Llc CUERVO-6H1 |
Rotorcraft | Bd Helo Enterprises LLC Boynton Beach, Florida |
Experimental | 2012-01-04 | ValidFAA registration status code V: Valid registration. All codes |
| N456GR | Robert Richardson CUERVO-6H1 |
Rotorcraft | R & L Heli Aviation LLC Boynton Beach, Florida |
Experimental | 2011-11-17 | ValidFAA registration status code V: Valid registration. All codes |
| N74898 | Bell 47D1 |
Rotorcraft | Individual owner Michigan |
Multiple | 2009-08-14 | ValidFAA registration status code V: Valid registration. All codes |
| N156PT | Hiller UH-12C |
Rotorcraft | Individual owner Minnesota |
Standard | 2009-01-15 | ValidFAA registration status code V: Valid registration. All codes |
| N62171 | Hiller-Felt UH-12C |
Rotorcraft | Individual owner | Multiple | 2008-10-28 | Reports overdueFAA registration status code N: Non-citizen corporation that has not returned its flight-hour reports. All codes |
| N5321V | Hiller UH-12C |
Rotorcraft | Individual owner Texas |
Standard | 2005-09-21 | ValidFAA registration status code V: Valid registration. All codes |
| N5301V | Hiller UH-12B |
Rotorcraft | Individual owner Alaska |
Standard | 2004-09-02 | ValidFAA registration status code V: Valid registration. All codes |
| N472GD | Bell 47G |
Rotorcraft | Individual owner Michigan |
Standard | 2003-10-29 | ValidFAA registration status code V: Valid registration. All codes |
| N780C | Hiller UH-12C |
Rotorcraft | Individual owner Nevada |
Standard | 1989-07-24 | ValidFAA registration status code V: Valid registration. All codes |
| N239SB | Hiller UH-12C |
Rotorcraft | Individual owner Oregon |
Standard | Sale reportedFAA registration status code 17: Sale reported, pending cancellation. All codes |
Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 23, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.