I would like to install a McFarlane vernier-assist throttle cable on my RV-14A IO-390 EXP and was wondering if anyone knows the exact model number.
Thanks,
Jim
Not mine but someone I know who did this with his throttle showed me this package so I took the picture.
Thanks for the replies!
If acro or formation are in your plans, don’t use a vernier throttle. My strong opinion based on using them. Yes if only a cross country machine
These are vernier-“assist”….totally different from standard vernier. They’re really nice cables and give you the best of both worlds…..easy push/pull along with the fine tuning of a twistable knob.
If acro or formation are in your plans, don’t use a vernier throttle. My strong opinion based on using them. Yes if only a cross country machine
I would like to install a McFarlane vernier-assist throttle cable on my RV-14A IO-390 EXP and was wondering if anyone knows the exact model number.
Thanks,
Jim
If these assist cables costs hundreds of dollars apiece (probably $500 plus) and I was still in the convenient building stage, I’d be looking hard instead at a center mounted throttle quadrant if formation flying was my thing…
When I ordered mine, I really wished that I could’ve found a sample of the measurements that someone else had taken, but could not. I’m attaching my order form so you have somewhat of a reference while taking your own measurements, and you should absolutely take your own measurements. Although the throttle cable is installed, I have not yet started up the engine, so I can’t confirm that I nailed everything perfectly. One thing to note is that the gimbal grommet that vans provides for the firewall pass-through has smaller diameter openings in it than the diameter of the MacFarlane throttle cable. I put a round file in a drill and reamed out the hole of the gimbal grommet to fit. The gimbal grommet is steel, so it took a while. I’ve flown an RV 12 with the vernier assist throttle, and it’s worth every penny.
Thanks!
Very helpful. I will also take my own measurements.
The Bulkhead fitting is .440"
The conduit diameter is .305"
Hope this help.
Thanks,
If these assist cables costs hundreds of dollars apiece (probably $500 plus) and I was still in the convenient building stage, I’d be looking hard instead at a center mounted throttle quadrant if formation flying was my thing…
The McFarlane Vernier Assist throttle is an OUTSTANDING throttle for formation flight. Like others already said, it is not your typical push-button vernier throttle (which should NEVER be use for formation flight). This is a normal push-pull throttle, but with the benefit of fine-tuned power changes by turning the knob.
As a flight lead, I love the vernier assist. If a wingman calls "Lead give me one," I give the throttle knob a full twist to the left, which in my setup reduces manifold pressure by 1 inch. For 4-ship echelon turns, I'll twist out one inch entering the turn for the sake of #4, then twist that inch back in upon roll-out.
It's a very smooth throttle, even with engine area temperatures up in normal operating range.
As for the "stock" throttle, don't bet on finding one. I had to order mine special using their order form's measurement guides.
how did this work for you @jclark now that you are flying? Did those measurements work out and was it for a EXP119?When I ordered mine, I really wished that I could’ve found a sample of the measurements that someone else had taken, but could not. I’m attaching my order form so you have somewhat of a reference while taking your own measurements, and you should absolutely take your own measurements. Although the throttle cable is installed, I have not yet started up the engine, so I can’t confirm that I nailed everything perfectly. One thing to note is that the gimbal grommet that vans provides for the firewall pass-through has smaller diameter openings in it than the diameter of the MacFarlane throttle cable. I put a round file in a drill and reamed out the hole of the gimbal grommet to fit. The gimbal grommet is steel, so it took a while. I’ve flown an RV 12 with the vernier assist throttle, and it’s worth every penny.
how did this work for you @jclark now that you are flying? Did those measurements work out and was it for a EXP119?
I think the measurements worked out ok. The routing and travel have been totally fine. I’ve had a problem with the control overall. It requires the friction lock to be backed off quite far in order for me to push or pull the throttle without it requiring significant force. This puts me at risk of the friction lock falling off and the vernier assist roller pins falling out. This isn’t consistent with the other vernier assist throttle I’ve flown with. I called McFarlane and they made me a new one at no cost. I am installing it this week.how did this work for you @jclark now that you are flying? Did those measurements work out and was it for a EXP119?
We will eagerly await the result of the new cable.I think the measurements worked out ok. The routing and travel have been totally fine. I’ve had a problem with the control overall. It requires the friction lock to be backed off quite far in order for me to push or pull the throttle without it requiring significant force. This puts me at risk of the friction lock falling off and the vernier assist roller pins falling out. This isn’t consistent with the other vernier assist throttle I’ve flown with. I called McFarlane and they made me a new one at no cost. I am installing it this week.