Cabane Gear for the Avid+

12 posts in this topic

Posted

Well I decided to go to cabane gear on the Avid+ and move the bungee gear that is on it now to the Mini+.  I had a few days off over the holiday so was able to get it all fab'd and tacked up.  Now I just need to coax Leni into welding it.  (I'm hoping he has forgotten about the pain of the Mini+ fuselage weld by now).  Leni, I promise that this is all new 4130 so should be much easier to weld...

My plan is to go with the Acme Aero shocks if I can get them to configure them for my geometry and GW.  I left an email with them but have not received a response or talked to them yet.

The bungee gear I have on the Avid+ is 5.5" taller than the Airdale extended gear.  I was able to modify the jig I had built for that gear and made this gear 8.5" taller than the Airdade extended gear. 

I know there has been a lot of discussion about the best geometry for the cabane type gear and since It seems the cub gear is pretty well proven, I decided to match the cub gear relatively close.  The tubes are a little different though, I used 1 1/8" X .049 for the main tubes and 7/8"  X .049 for the cabane.  I also have the third mount point forward of the stock mounts on the Avid to give it more strength and a wider V for the leg.  This gear is probably overkill and a lot heavier than needed for normal situations but I tend to land in some places that can be rough and I don't want to break it in the middle of nowhere.

Anyway, here are the pics.

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Posted


Gear Looks great Randy.  You know I can't say no to ya, I have a vested interest in seeing this bird in the air!  Just by chance, did you run a tube through the axle tubes to assure they are straight?  What do you think about putting a web between the axle tube and the gear leg like the cub beef up?  If ya like the idea, I have some 4130 plate at the house that would be perfect for it and I can add that in after I weld up the rest of it.  I think you will like that taller gear so you can get that AOA.  With that big wing and the yamayeehaa in the nose this should be an awesome STOL bird!

:BC:

 

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Posted

one thing I see that you might think about.  On gear that tall, especially with the big tires, you might want to put that angle at the top of the step plate so you can put you whole foot onto it instead of just that tiny ledge.  I can see some busted body parts especially on skis with big boots on.

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Posted

Hi Leni,

Yes, I cut the brace plates and have them ready to weld in but left them off so you can weld in there first.Two of them on each side will be the lower mount point for the shock.  I'll have to think about the step.  I put traction tape on mine and have not had any trouble standing on them and the tire.

Thanks,

Randy

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Posted

That is going to be beautiful gear!

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Posted

A few more pics as I was fitting the gear to the Mini+ fuselage to drill the third mount holes.  I will swap the gear off the Avid+ onto the mini+ and put the cabane gear on the Avid+ but with the same mounting points they are interchangeable.

DSCN4227-1.jpg

DSCN4229-1.jpg

DSCN4231-1.jpg

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Posted

Leni got the gear welded up (great job as always!) and it now has two coats of primer on it.  Getting closer.  I got the fairings milled up and ready to put on, then will cover it.  The ACME Aero shocks should be here any time now.  Hope to have everything ready to put on when I switch back to wheels.  

DSCN4313-1.jpg

DSCN4318-1.jpg

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Posted


I can't wait to see how that gear looks on the bird and how they perform!  I might have to borrow that jig and start making more of these.

 

:BC:

 

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Posted

Well I decided to go to cabane gear on the Avid+ and move the bungee gear that is on it now to the Mini+.  I had a few days off over the holiday so was able to get it all fab'd and tacked up.  Now I just need to coax Leni into welding it.  (I'm hoping he has forgotten about the pain of the Mini+ fuselage weld by now).  Leni, I promise that this is all new 4130 so should be much easier to weld...

My plan is to go with the Acme Aero shocks if I can get them to configure them for my geometry and GW.  I left an email with them but have not received a response or talked to them yet.

The bungee gear I have on the Avid+ is 5.5" taller than the Airdale extended gear.  I was able to modify the jig I had built for that gear and made this gear 8.5" taller than the Airdade extended gear. 

I know there has been a lot of discussion about the best geometry for the cabane type gear and since It seems the cub gear is pretty well proven, I decided to match the cub gear relatively close.  The tubes are a little different though, I used 1 1/8" X .049 for the main tubes and 7/8"  X .049 for the cabane.  I also have the third mount point forward of the stock mounts on the Avid to give it more strength and a wider V for the leg.  This gear is probably overkill and a lot heavier than needed for normal situations but I tend to land in some places that can be rough and I don't want to break it in the middle of nowhere.

Anyway, here are the pics.

DSCN4211-1.jpg

DSCN4212-1.jpg

DSCN4213-1.jpg

DSCN4214-1.jpg

DSCN4215-1.jpg

DSCN4200-1.jpg

DSCN4208-1.jpg

Randy, you do some nice work. Are you located anywhere near Monroe, NC? I am building my own gear, and I am looking at traction springs now. I am thinking somewhere between 1200-1800N for spring force for my MKIV. What kind of numbers are you looking at for traction spring force? What kind of travel are you looking for in your traction spring?

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Posted

Leni, you got it anytime you want it.

 

Supermotive, I am not sure I can answer your question very well; I kind of went nuts and ordered a set of Acme Aero Pro suspension shock system.  I just got them today because they initially made a mistake and built me the Black Ops first and sent them but I ordered the pro's so them quickly took them back and made me the Pro's.  The difference is the Black Ops have 4" travel at the shock with a single rate spring and the Pro's have 5" travel at the shock with a dual spring so it has a softer spring rate that bottoms into a stiffer spring.  They also are nitrogen charged.  I gave them my gear geometry and length I needed for the shock had them set them up for 1500lb gross weight.  I am sure they apply an impact factor on that as well.  We will see if they got it right.

I didn't bother to calculate out what the load would be at the shock since I was leaving that up to them and they didn't give that info in the data they provided.

I'm in Alaska so a little ways away from NC, but let me know if I can be of any help.

Randy

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Posted

If you don't mind me asking, how much did the acme aero shocks cost?

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Posted

Don't pass out; The Black Ops are about $3000 and the Pros are about $3400.

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