I am looking in to the MCFARLANE Vernier-assist dual throttle for my ROTAX 912ul. I believe the part # is MCTV0005D048. Does anyone have any experience with this setup? I would appreciate any feedback both positive or negative.
Dutch
Printable View
I am looking in to the MCFARLANE Vernier-assist dual throttle for my ROTAX 912ul. I believe the part # is MCTV0005D048. Does anyone have any experience with this setup? I would appreciate any feedback both positive or negative.
Dutch
I have this exact model/part number. It is a quality setup, I have enjoyed it for 80 hrs now . I use the vernier feature for small adjustments on taxi and cruise.It was a good improvement from my older thicker cable setup that I had to keep the friction lock pretty tight in order to keep settings.
Very nice! I missed out on that one...
I also have the mcfarlane vernier assembly. I love it.
Follow the recommended instructions for install so that you don't pull the throttle cable out of its sheath, this is a small but fixable nightmare. The vernier assembly uses a set of springs and loose fitted roller bearings and if you pull the throttle handle out during install the bearings and spring become disassembled. Finding them might be a challenge, but there is a Youtube video for the reassembly.
Just don't disassemble it during install like I did and you will be fine.
Thank you guys.For your feedback. Pulled the trigger this morning. Looking forward to smooth throttle control,
Dutch
Thanks for bringing this up as I have been trying to find a control like this for a while. I have always been lurking but never post but have built and been flying my 4-1200 912S for 14 years. Just finished up about 40 hrs of work on this years inspection. After 14 years many things needed attention.
I made a short test flight yesterday and love that throttle. I was able to set my idle a little lower and use the vernier to keep idle where I wanted it. I had always been pulling on the knob before on final to keep the rpms down.
I also replaced the battery with an Earthx it seems to crank 2x faster and weighs nothing. Also rewired the coils and engine harness so I could use the 6 plus 6 soft start module. I only used 1 and start on it and bring in B after running. My original 6-4-1 modules still working so I changed the connectors on them so I have a spare in my tool kit. If any one needs info on this I have it including where to get the connectors and pins at a great price.
Ed Grasso
Same feelings here, I bought my 1994 model IV-1200 a few years ago, it had the 912 with Bellcrank throttle, could not ever balance consistently, so that it would stay balanced, last winter I changed the engine mount to the slightly beefed up improved one, and did all hoses etc, and put in that Mcfarlane throttle cable, did it and set up as instructed, and love it, works great, smooth, consistant and reliable, worth every penny!!
Where are you sourcing the McFarlane throttle.
I have been wishing for this item for years.
Is it a relatively new product or I have been missing out?
Ed
Please share the how to do the 6 x 6 soft start to a 6-4-1 module.
Thanks
Herman
Herman,I ordered mine from Chief aircraft in Grands Pass OR.
They were cheaper than McFarlane.
Dutch
Herman, I purchased the throttle from McFarlane it came with new carb return springs that seemed to have a little less tension.
I’ll be at my hanger this weekend and take some pics of the connectors and post them with a parts list and wiring diagram next week.
Ed
G`morning Dutch
I just looked on the Chief website and I don`t see the vernier throttle listed,just the standard friction lock ones. Am I missing something?
I have the standard friction lock supplied in the mid 90`s kits and am looking at up-grading.
Cheers
Don
Don,
They don't have it in their catalog as of yet. But have access to all of MCFARLANE products. call 800-447-3408 & tell them what you need & they will have it shipped directly from MCFARLANE to you. Nice folks & like I said before.
Cheaper than buying it directly from MCFARLANE.
The kit includes all the hardware.Inluding new springs. cable ends, cable locks, & nuts, washers, & even a little hex wrench.
Dutch
Thanks Dutch. I`ll do that
Don
Thanks Ed and Dutch
It is great that you guys share this information.
Herman
How long does the cable have to be for a Modell 4 Speedster?
I sure would lie some information about the soft start module change.
Cheers Tuna
Chief Aircraft no longer sells throttle cables. I ordered over internet only to have them message me they no longer sell them and failed to remove from catalog....
Aircraft Spruce to the rescue...
I got mine from Kitfox in my firewall forward kit. I wasn't expecting that. I had seen Desertfox1's throttle and new I was going to get that vernier throttle. Contacted the company and everything. I was pleasantly surprised to see that Kitfox supplies it in the 912is package.
Eddie
How did you set the cable up? Did you use the spring assist on throttles?
I hear some do and some don't use them. Any help? Forgot to mention going in a model 7 with rotax 912...
These cables are designed to pull only, not push. The spring on the carburetor opens the throttle, the cable pulls it closed.
Thanks for the reply. It's always made sense to me because thats the way rotax sets them up. My last 7 did not utilize the springs and worked great.
I tried the springs on this one and it was like pulling a garage door shut on throttle. I see Mcfarlane provides less pull springs. The one I ordered is a MCTV0005D048 should be good to go.
I bought both the medium and the light McFarlane throttle springs for the 912. I tried both and definitely like the lightest ones the best.
Not sure what springs they send with unit do you have a part number for the lighter springs? Will I be able to set it up appropriate with springs they provide?
Not sure what you mean by "they" provide. Rotax provided springs are quite heavy. Don't have part numbers, but if you go to the McFarlane website for Rotax 912 parts, you will see that they offer two throttle springs-get the lightest one in my opinion.
I ordered the throttle and was wondering what springs come with the Mcfarlane cable. It actually ships with 2 springs that have lighter pull than the Rotax and conduits. You mentioned even a lighter spring and that is what I was referring to. Thanks for your help here....
after flying with a push pull cessna type throttle and trying to find the sweet spot. this mcfarlane is the answer. i used the light duty srings to assist and what a breeze.Actually fly and apply friction and still use the veneer feature.
Super nice to find that sweet spot in throttle settings. Higly recommend. I purchased from CPS Chief no longer sells them. A bit more money but I got it.
Any questions ask...
We installed a McFarlane vernier throttle in my 7SS project. It comes with a set of the lighter springs for the Rotax. Seems to be a very high quality item. Needed to trim about 1 foot of the cable shroud to fit. Use caution not to pull the throttle handle out too far before trimming cable shroud. Little parts will fall out of the throttle mechanism. Not hard to put back together as long as no little parts are lost.:rolleyes: Used a dremel with a cut off wheel to very carefully cut through the cable shrouds at the desired lengths and not nick the cables inside.
Anyone interested in a Vernier throttle cable off a model 7? It has the push button and twist adjustment. I bought a different one . It worked but I was not used to the button. I see McFarlane has a rebuild kit for it available as it is about 14 years old.
If you would have asked me two weeks ago I would have been all over that as I just bought a cable in that time!
I'm about to purchase the McFarland throttle to replace my old 92 kitfox 4 speedster throttle vernier with the threaded rod and small steel ball on the inside.
Running a 912 UL
Is this the correct part? Anything else I need to get for this to work?
https://www.mcfarlaneaviation.com/pr.../MCTV0005D048/
That part number has cable ends.
The cable ends go into the bing 64 carb throttle arm cable bolt attachment.
if you decide on the mcfarlane , send me a pm and ill give you some tips that may save some headaches . i had a couple of problems but mostly my fault .
great throttle and good customer service, i got mine from mcfarlane. a little getting used to after my old button type throttle .
Currently I have the button but I have not used it a ton. The McFarland uses a friction lock with no button correct?
There should be no issues with throttle creep or anything like that with the McFarland correct?
My current one holds well just getting it initially set is frustrating if I move the throttle with the button.
i used the button all the time on the old throttle and liked it. with the mcfarlane the vernier only works if the push function is locked tight. the friction can also be light enough to allow both push and vernier but there is the risk that during a power reduction with the vernier that the friction will be removed to where the throttle will go to wot on its own. some thing to get used to
Well damn, that would be an interesting discovery should that play out on my first test flight! Thanks for that heads up.
Is this because of the 'pull' of the carburettor springs? In other words, would this happen with a 912iS, which don't have carburettors?Quote:
there is the risk that during a power reduction with the vernier that the friction will be removed to where the throttle will go to wot on its own.
Yup, 912iS also has a WOT setting with a spring should the cable/connection fail.