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Three Lever Flat Top Quadrant Formation by DJM mfg.

Danny King

Well Known Member
Sponsor
Years ago I replaced Van's kit RV-8 throttle quadrant with the new DJM Manufacturing's Deluxe Throttle quadrant. The improvement to the Doll's control panel was huge! When I first saw the Deluxe quad it had the Prop and Mixture levers bent over 90 degrees. On long cruise legs, I cross my feet in-front of the stick causing my left knee to lay against the side of the quadrant. I figured my knee would make undesired changes to the Prop and Mixture levers. I contacted Dayton and ask if he would just leave those two levers strait and I would bend them the way I want them. He ask how I wanted them. I requested they be bent at 45 degree angles with the mixture lever being just under the Prop lever, with both under the Throttle lever. When the Quadrant arrived, I was absolutely delighted with the beautiful manufacturing. The Prop and Mixture levers were perfectly placed as I requested. At Oshkosh, I had a dozen builders ask me where I got that beautiful Throttle Quadrant with the levers like I had them. I told them to contact Dayton Murdock at DJM mfg. inc. and ask for the "Danny King" Quadrant. I didn't know what else to call it!

Years later I attended the "Beer Fairy" RV gathering on the first Monday after the airshow at Oshkosh and ran in to Dayton. As we visited over a beer I mentioned I love my special throttle quadrant, and that it is almost perfect! Dayton ask how would I improve it? I said when I fly formation in the Doll, I have to set the friction tight so the mixture and prop levers will not creep when constantly jockeying the throttle during formation flight. Dayton said to check you mail when you get home! I did, and found a small box from DJM mfg. Inside was a dual friction Deluxe Throttle Quadrant. The engineering was simply beautiful. I installed it in the Doll with bran new control cables and once again the improvement to the Doll's control panel was Huge! I flew a 4-Ship formation and loved the free moving throttle. Small adjustments required to hold finger tip position became a breeze. After 24 years of flying the Doll, I was surprised how much easier managing the power had become.

I learned that the dual friction quad was not just better for formation, but everyday flying as well! After I adjust the Doll's power, mixture and prop, I lock both frictions down and relax for cruising flight. When it's time to descend, I release some friction on the throttle and reposition the mixture and prop as required without adjusting their friction. Once in the pattern I flip the throttle friction lever down releasing all the friction and once again the throttle moves freely in my hand for small adjustments flying the pattern or for a touch and go. I really love it!

If you haven't upgraded to the DJM mfg. Deluxe Throttle Quadrant, I highly recommend that you do! I bet you will love it as much as I have for years now. I also believe the Formation Dual Friction Model is more than worth the additional cost over the single friction models for all phases of flight!

Happy flying
Danny
 
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One thing I've wondered - who manufacturers the kit RV-8 throttle? As it's something that we'll have in our hands every single flight, I think this is one place where splurging a bit is worth it. It seems like the DJM might be the kit throttle these days though?
 
Link

I ordered the rear seat throttle, and am really pleased with it.
Will be ordering one of these when the time comes.
 
Years ago I replaced Van's kit RV-8 throttle quadrant with the new DJM Manufacturing's Deluxe Throttle quadrant. The improvement to the Doll's control panel was huge! When I first saw the Deluxe quad it had the Prop and Mixture levers bent over 90 degrees. On long cruise legs, I cross my feet in-front of the stick causing my left knee to lay against the side of the quadrant. I figured my knee would make undesired changes to the Prop and Mixture levers. I contacted Dayton and ask if he would just leave those two levers strait and I would bend them the way I want them. He ask how I wanted them. I requested they be bent at 45 degree angles with the mixture lever being just under the Prop lever, with both under the Throttle lever. When the Quadrant arrived, I was absolutely delighted with the beautiful manufacturing. The Prop and Mixture levers were perfectly placed as I requested. At Oshkosh, I had a dozen builders ask me where I got that beautiful Throttle Quadrant with the levers like I had them. I told them to contact Dayton Murdock at DJM mfg. inc. and ask for the "Danny King" Quadrant. I didn't know what else to call it!

Years later I attended the "Beer Fairy" RV gathering on the first Monday after the airshow at Oshkosh and ran in to Dayton. As we visited over a beer I mentioned I love my special throttle quadrant, and that it is almost perfect! Dayton ask how would I improve it? I said when I fly formation in the Doll, I have to set the friction tight so the mixture and prop levers will not creep when constantly jockeying the throttle during formation flight. Dayton said to check you mail when you get home! I did, and found a small box from DJM mfg. Inside was a dual friction Deluxe Throttle Quadrant. The engineering was simply beautiful. I installed it in the Doll with bran new control cables and once again the improvement to the Doll's control panel was Huge! I flew a 4-Ship formation and loved the free moving throttle. Small adjustments required to hold finger tip position became a breeze. After 24 years of flying the Doll, I was surprised how much easier managing the power had become.

I learned that the dual friction quad was not just better for formation, but everyday flying as well! After I adjust the Doll's power, mixture and prop, I lock both frictions down and relax for cruising flight. When it's time to descend, I release some friction on the throttle and reposition the mixture and prop as required without adjusting their friction. Once in the pattern I flip the throttle friction lever down releasing all the friction and once again the throttle moves freely in my hand for small adjustments flying the pattern or for a touch and go. I really love it!

If you haven't upgraded to the DJM mfg. Deluxe Throttle Quadrant, I highly recommend that you do! I bet you will love it as much as I have for years now. I also believe the Formation Dual Friction Model is more than worth the additional cost over the single friction models for all phases of flight!

Happy flying
Danny
Thank you for confirming my instinct on the benefits of the Dual Friction Model (apparently aka the "Danny King Special" :) ....Though still in the building phase, I'd also like to make a plug for it. Clearly superior. My original three lever flat top quadrant suffered from somewhat minor but annoying "cross talk" between control movements. I theorized the issue was partly a single friction lock coupled with rotation movement transferred across controls due to the manufacturing tolerances in the brass arms/stays. I was just about ready to try brazing the brass stays to at least fill any gaps between it and the lower bolts, perhaps even making a brazed connection with the bolts passing through the end of the brass stays (only will make sense if you have in front of you), and maybe adding teflon washers between controls (unsure if that would even help btw). Thanks to the VAF, I found out about formation dual friction model and traded up. For whatever reason, the tolerances were much tighter in the brass stays...hence minimizing crosstalk...And the addition of dual friction locks allowed finer movements in general as well as minimizing cross talk. Clearly a superior product well done,.

Note: One tiny observation (bordering on very minor knit)....I still have tiniest amount of slop both in the front and in the rear quadrant due to minor tolerances in the hole size linking throttle quadrant movement with action. Guessing holes drilled, not reamed. Again...MINOR. :)
 
Danny, you indicate yours is the flat top versus curved, and operationally wondering about the difference if any.
 
Danny, you indicate yours is the flat top versus curved, and operationally wondering about the difference if any.
I'll answer but with the disclaimer I have the flat version, not the round one...but I did look into it for myself. Difference is purely aesthetic. I don't know if the bolts are in exactly the same location or not as the flat version
 
Danny- Is the three lever formation quadrant a drop in replacement or are there any modifications required from the standard 3 lever quadrant? I find that jockeying the throttle in formation causes the prop to change slightly at times so having separate friction controls would be good.
 
Danny- Is the three lever formation quadrant a drop in replacement or are there any modifications required from the standard 3 lever quadrant? I find that jockeying the throttle in formation causes the prop to change slightly at times so having separate friction controls would be good.
I don’t want to speak for others, but since I made the modification just a year ago from standard 3 lever flat to formation 3 lever flat…thought I could help…..no modifications required other than upsizing the hole that the friction lock passes through.

Jdk
 
Danny, you indicate yours is the flat top versus curved, and operationally wondering about the difference if any.
I can't speak for the curved top quadrant as I've never had one, but I don't think that would make a difference in the operation of the levers.
 
Danny- Is the three lever formation quadrant a drop in replacement or are there any modifications required from the standard 3 lever quadrant? I find that jockeying the throttle in formation causes the prop to change slightly at times so having separate friction controls would be good.
It was a complete drop in with no modification required. It's a job, and you could use a helper, but if you replace aging control cables it's the same job. That's why I replaced all my cables when I swapped out my quadrant. My throttle cable was getting stiff anyway.
 
It was a complete drop in with no modification required. It's a job, and you could use a helper, but if you replace aging control cables it's the same job. That's why I replaced all my cables when I swapped out my quadrant. My throttle cable was getting stiff anyway.
 

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I have this (see below), and the prop RPM wanders as the friction doesn't hold the lever firmly irrespective of the friction adjustment knob. So I am looking at changing it out for the JDM formation version. I think I could choose either the flat top or rounded top in my installation - so which one would I prefer?? I don't have any specific preference style-wise - just want to know if there is a reason to prefer one over the other.
I see some have replaced the control cables at the same time - my cable seem to work ok (not sure the brand) but I was wondering if I would regret doing the cable change down the road one day?
When giving advice, please bear in mind I am not the builder and only have the most basic tools and no building knowledge or local mechanical support.
Thanks
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I added a pair of HDPE plastic washers to my throttle and mixture levers in my 6. I did have to up the length of the bolts and put a washer in the upper bolts assembly to keep it square. I can crank the lock down to hold the prop lever from creeping and the throttle and mixture are very smooth and easy.

Ed
 
I added a pair of HDPE plastic washers to my throttle and mixture levers in my 6. I did have to up the length of the bolts and put a washer in the upper bolts assembly to keep it square. I can crank the lock down to hold the prop lever from creeping and the throttle and mixture are very smooth and easy.

Ed
I have this (see below), and the prop RPM wanders as the friction doesn't hold the lever firmly irrespective of the friction adjustment knob. So I am looking at changing it out for the JDM formation version. I think I could choose either the flat top or rounded top in my installation - so which one would I prefer?? I don't have any specific preference style-wise - just want to know if there is a reason to prefer one over the other.
I see some have replaced the control cables at the same time - my cable seem to work ok (not sure the brand) but I was wondering if I would regret doing the cable change down the road one day?
When giving advice, please bear in mind I am not the builder and only have the most basic tools and no building knowledge or local mechanical support.
Thanks
View attachment 82628
I have this (see below), and the prop RPM wanders as the friction doesn't hold the lever firmly irrespective of the friction adjustment knob. So I am looking at changing it out for the JDM formation version. I think I could choose either the flat top or rounded top in my installation - so which one would I prefer?? I don't have any specific preference style-wise - just want to know if there is a reason to prefer one over the other.
I see some have replaced the control cables at the same time - my cable seem to work ok (not sure the brand) but I was wondering if I would regret doing the cable change down the road one day?
When giving advice, please bear in mind I am not the builder and only have the most basic tools and no building knowledge or local mechanical support.
Thanks
View attachment 82628




Click on picture below to see installed DJM engineering Dual Friction Formation Quadrant.
 

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Is this a direct drop in for a standard Vans 3-lever? I don't care for my current on. Cable lengths and termination the same?
 
Is this a direct drop in for a standard Vans 3-lever? I don't care for my current on. Cable lengths and termination the same?
Speaking for myself, formation was a drop in for standard DJM 3 lever (except I needed to upsize hole slightly for the slightly wider friction lock mechanism). Holes on lever connecting to cables in exact same placement. Bolts and attachment points the same. Simply a better mechanism. Vans sells DJM so I'm assuming you are referring to that? If you are referring to the older kind of hokey looking version, I don't know, but I would think it would be a drop in or require very minor tweaks.
 
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