Vernier-Assist Controls

 

Standard Vernier performance without the button!

  

Now FAA-PMA Approved! 

  • Jam-proof safety
  • Precision power adjustments
  • Smooth friction control
  • Light and compact

 

McFarlane’s patented Vernier-Assist™ offers the pilot precision control of the engine, unlike anything else on the market! The Vernier-Assist assembly operates on friction alone by simply turning the knob, with no threads or locking balls/pins. It also allows for normal coarse movement by pushing in or out on the knob. Unlike standard threaded vernier controls, this design cannot be jammed. The friction control provides smoothness and precision when operating the throttle and a friction lock secures the control in position, but it can be easily overridden in the case of an emergency. It is SAFE!

 

These light weight controls use a patented roller action and do not use a positive lock thread engagement. Coarse adjustments are made by pushing the knob inwards or pulling the knob outwards. Fine adjustments are made by rotating the knob clockwise or counterclockwise. For extreme conduit routing or heavy carburetor load installation, slight inward or outward assist pressure could be required during rotation.

US Patent No. 8,485,057 B1 

 

 

To find the control for your aircraft, go to Throttle Controls

 

Custom Vernier-Assist Controls Also Available. For more information go to Services

 

 

 

Part Numbering Note:

Part numbers for Vernier-Assist™ are the same as McFarlane's original push-pull FAA-PMA approved controls, except the "MC" prefix changes to "MCVA". 

 

Examples:

  • Standard Push-Pull P/N MC9863056-2 or Vernier-Assist™ P/N MCVA9863056-2
  • Standard Push-Pull P/N MCS1222-1S or Vernier-Assist™ P/N MCVAS1222-1S
  • Standard Push-Pull P/N MCC299505-0101 or Vernier-Assist™ P/N MCVAC299505-0101

 

 

To find the control for your aircraft, go to Throttle Controls

 

 

MCMV Mixture Series:
Vernier action with only a 3/8" panel hole!

 

The new Vernier-Assist mixture control offers vernier action in a light weight, compact package. It is a drop in replacement for many existing non-vernier mixture controls because it only requires a 3/8" panel hole. It also only extends about 3.5 inches behind the dash making it ideal for aircraft with tight space constraints. Available in a variety of standard lengths or can be custom fabricated to your unique requirements.

 

Mixture Control Specifications

 
Mixture Control with 0.061" diameter solid wire end:
MCMV0241-LLL (knob included) or MCVA0241-03-LLL (without knob)
 
 
   

MCTV Throttle Series:
Vernier and friction lock - The best of both!

 

 

 

The new Vernier-Assist throttle control is adjustable for friction and vernier engagement and is available with three different end configurations. Requires a 3/4" panel hole. Available in a variety of standard lengths or can be custom fabricated to your unique requirements.

 

Throttle Control Specifications

 

Throttle Control with 10-32 threaded end:
MCTV1035-LLL (knob included) or MCVA1035-20-LLL (without knob)

 

Throttle Control with 1/4-28 threaded end: 
MCTV2035-LLL (knob included) or MCVA2035-20-LLL (without knob)

 

Throttle Control with 5/64" dia 1x7 twisted stainless steel wire end: 
MCTV3035-LLL (knob included) or MCVA3035-20-LLL (without knob) 

 

Dual Throttle Control with 1/16" dia 1x7 twisted stainless steel wire ends: 
MCTV0005DLLL (knob included) or MCVA0005-30DLLL (without knob)  

MCVA Universal Series:
Although not specifically a prop control, the MCVA series controls can be used with a 6730 Knob as a prop control for non-certified aircraft. Available in a variety of standard lengths or can be custom fabricated to your unique requirements.

 

Knob is not included. Requires a knob with 1/4-20 thread.

 

Control with 0.061" diameter solid wire end:
MCVA0241-00-LLL

 

Control with 10-32 threaded end:
MCVA1035-20-LLL

 

Control with 1/4-28 threaded end:
MCVA2035-20-LLL

 

Control with 5/64" dia 1x7 twisted stainless steel wire end:
MCVA3035-20-LLL

 

Dual Control with 1/16" dia 1x7 twisted stainless steel wire ends:
MCVA0005-30DLLL 

Share this article: