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Bushwacker 2.0 a.k.a. Cub Killer

I would like to use earth x but I am worried about having it inside the cockpit. I currently have it mounted on the firewall cockpit side. I was reading on EarthX web site they don't recommend having it inside.
Greg
EarthX has a fully vented battery (ETX900VNT) for use inside the cabin.
Lou

1
 
It might be a few weeks but I will get some video and post it on Youtube.

Greg, that would be great. I would really like to see some more photos of your finished interior as well. I’m really excited to see this plane fly—I think the concept and changes are great.

Joe
 
Congrats Greg! Another impressive build. Can't wait to see it perform as you get it all dialed in. As conscientious as you are about weight, what made you decide on the aluminum blade hartzell over some of the carbon/wood composite props? I noticed Bushwheel Bill's 540 powered pumpkin maule had a few MTs on it before going back to aluminum. I figured you guys had a reason for choosing what you did.
 
It is mostly a money thing for me, I can buy 4 or more of the Hartzell propellers for what it would cost me for 1 MT. Bushwacker has plenty of weight in the tail so lighting the propeller is not going to be as much of a pay off as it is on a cub. I still run a 1p235 on my Super Cub even though pretty much everyone else that is experimental runs a composite. I like the fact that I could straighten or cut off what is left of a metal prop and still get somewhere. Not sure with a constant speed that is an argument in favor of a metal but for a fixed pitch it is.

It comes down to dollars though, if MT wanted me to test something and it only cost me 3500 like my prop did I would be all in!
 
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Mauleguy, Is there a back seat which plugs into the baggage door when it is closed? Your plane looks great.
 
Greg

Very very well done. I look forward to seeing it in person sometime. Best regards

Bill
 
Mauleguy, Is there a back seat which plugs into the baggage door when it is closed? Your plane looks great.

Yes, it has a rear seat like the Maule for two passengers. I moved it forward around 7" from the stock position of a Maule. The passengers would get in the front doors now from either side and there legs when seated would go up to the main structure cross bar. It actually gives them more leg room then a stock Maule. I have not had it in since I did the fuselage build up but the wife will get a ride soon. I have about 7 hours on it now so still getting use to it but for the most part it feels like a Super Cub. The visibility is much better than my Super Cub both landing and taxing on the ground.
 
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when i look at this picture, all i can think of is a king in his throne. I like it. awesome.
 
What material and thickness did you use for your flooring and siding?

The floor material is a composite with honeycomb core, I think it was Boeing surplus. It came in a 5 X 10 sheet .375 thick.
The side panels and extended baggage are .020 and powdercoat with the hammer finish.
The upper is Oratex in silver I had left over from the Super Cub build.
 
How long are your wings beyond the strut? Would you mind sharing anything you did with the spars out there?
 
I have not put a tape measure on them past the strut but compared to a Cub it is a long distance. These wings were certified at 2500 pounds by Maule originally at 33'8" of wing span. Because this airplane is a IO-360, it is pretty hard load the airplane to a gross weight of 2500. Most the time I am 2300 or less fully loaded for an adventure.

The spar splice was done with Maule spar blank material and doubler on both sides of the spar and one extra rib. I am sure I have some pictures of that somewhere. As I stated earlier I also increased the .020 upper skin to .025 but I did that more for aesthetics but probably does nut hurt. If you shake a Maule wing it does not move a whole lot compared to shaking a Super Cub with extended wings. I did not have any engineering done so I guess I am a test pilot. Maules were certified with a never exceed speed of 180 mph I believe and you would be hard pressed even in a dive straight down to do that on 35" ABW. I only lengthened the one spar by 12" (I think it is the rear) the front has to be lengthened more because of the way they did there wing tips the front spar is shorter to start with. I never liked the way they balanced there aileron externally. I had caught it a number of times on branches so I decide to do Dakota wing tips and balance the aileron internally.
 
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Looks like a lot of work and a lot of patience. great build Greg! Looking forward to seeing you out in your new flying machine in Idaho this year.
 
You have come up with some creative ideas. I like the look of your oleo's. Do you run oil in your Oleo's? How is the rebound dampening with you setup? It is going to be hard not to compare your new plane with Paul's new 4 place cub. It would be fun to see them side by side.
 
I don't have enough time with the new designed oleo to say to much yet. I did run all polyurethane discs before in the Maule style oleo. I just incorporated the spring in the new design and made the canister larger diameter to allow for larger polyurethane discs, I think it will probably be awesome. I have ran something very similar on my cubs for a long time and I like it a lot. To me the AOSS is to rigid and I have modified many units over the years to incorporate the 3" die spring along with the polyurethane and in my opinion it is superior for off airport. The die spring takes the initial hit and the the polyurethane does the rest. You really can't bottom out the polyurethane but you can the spring so you get much softer landings in rough stuff but you don't have to worry about bottoming the unit out. They don't have any oil, they have a bronze bushing where the shaft moves and I spray some LPS in there for a little rust protection.
 
Yes, it has a rear seat like the Maule for two passengers. I moved it forward around 7" from the stock position of a Maule. The passengers would get in the front doors now from either side and there legs when seated would go up to the main structure cross bar. It actually gives them more leg room then a stock Maule. I have not had it in since I did the fuselage build up but the wife will get a ride soon. I have about 7 hours on it now so still getting use to it but for the most part it feels like a Super Cub. The visibility is much better than my Super Cub both landing and taxing on the ground.

Gorgeous plane and a really nice build Greg! I am looking forward to seeing how it performs and following it!
 
Very nice build and lots of creative ideas. If you need somebody to mess up that shop give me a call. That's way to clean.
 
DJ, No on the high compression pistons. I actually have not touched the motor, other then making it work for me. Changed the sump to forward facing from rear facing, added B&C 20 amp accessory mount alternator, changed the oil filter adapter to a different style, new plugs and wiring harness, new baffling, some paint here and there while I had things apart.

My shop is usually pretty clean but it is something I have trained myself over the years to do. It is easier for me to find things and when you have as many tools as I do it is a must. I still find myself wondering around thinking to myself where the heck did I leave that thing! I am also running my machine shop in the same space so it just makes life easier.
 
Greg, I’m sure you’ve thought this thru. But as a 2 Maule owner I was never a fan of the Oleo’s, kind of pogo sticky like cub bungees. Especially when flying light.
After flying with TK 1’s (cub) I cant imagine life without.
A little more external drag but what sold me was rebound dampening, the ability to keep wheels planted on the ground when landing rolling, rough terrain. Better braking = shorter landing, and less abuse on the airframe.
Think they would be pretty easy to adapt.
Just a thought.
Really enjoyed following your Maule builds, you are very talented.
Doug
 
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I have only flown Mike Olsens cub with TK-1, so not much time on them myself. Others of course love them, I did not like all the bulkiness of the unit and the early ones I saw were not even using AN hardware, they have probably changed that by now.

I have used polyurethane disc segments in my Maule oleo canisters with no spring for at least 10 years and they don't pogo you at all, I incorporated the short die spring because I liked it in my unit on the cub which also has polyurethane segments.

If I were to try and adapt anything it would be the Acme, I like the looks and reports from people I know that use them say there is nothing out there to beat them. The Acme and Maule canisters are also much more streamlined so with my goal of going faster not slower the TK-1 is out.
 
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