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Old 02-19-2017, 10:30 AM   #1
Sbenson11
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50% Hi-Max Ultralight Build


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So after being away from the hobby for 25 years I have jumped back in with a project I was going to build so long ago.

Itís going to be a Ĺ scale TEAM Hi-Max Ultralight.

https://www.teammini-max.com/aircraft/1700r-hi-max/

This is a wood ultralight that you can build in your garage and fly yourself. I was going to build a full scale one many moons ago but decided to build a Ĺ scale version for my latest project. Itís a pretty easy build, not much different than an over sized balsa plane. It will be a fairly lengthy project for me as I not get a lot of time in the workshop. My hope is to have it ready to hit the skies for the spring of 2018. It will be about 150Ē wingspan when completed. My plan is to be as true to scale as I can.

I am by no means an expert so if you have questions, comments or suggestions, fire away. I take lots of pictures so please follow along if this sounds like something that might interest you.

Steve
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Old 02-19-2017, 10:34 AM   #2
Sbenson11
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Re: 50% Hi-Max Ultralight Build

So let's get the ball rolling,


Step one: download the free plans and have them printed. Just so happens a good friend of mine has a large format printer at work and printed them for me at no cost. Not yet anyway, I have a funny feeling a favour is going to be asked sometime in the future.

Steve

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Old 02-19-2017, 10:41 AM   #3
Sbenson11
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Re: 50% Hi-Max Ultralight Build

I am a big tightwad so I reclaim/reuse wherever I can. For this project most of the wood will be reused from an old bed I made years ago. It's not easy to find clear straight grained pine around here, but this stuff is perfect. The instructions that came with the plans suggest that you start with the rudder and vertical fin to get your feet wet. So I figured out what wood I needed for the tails surfaces and planned it down and cut it to size.

The leading edge of the fin and horizontal stabilizer is made from 4 pieces of wood laminated together for added strength. So that's where I started.

Steve







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Old 02-19-2017, 10:50 AM   #4
Sbenson11
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Re: 50% Hi-Max Ultralight Build

My work bench has seen a lot of work so it's not the smoothest thing in the world. So i lade out a piece of 3/4' plywood and attached some heavt paper to it with some 3M77 adhesive. I drew out the tail surfaces on the paper, cover it with wax paper and went to work.

I tacked everything with ca and followed it up with some epoxy after everything was assembled. As per the plans all the joins were reinforced with thin plywood, in this case 1/64" plywood. I also cut the rudder control horn from a scrap piece of aluminium. Sanded everything down and these pieces are pretty much done.

There are some brackets for the bracing on the tails surfaces, so I made those at this time as well.

Steve









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Old 02-19-2017, 11:19 AM   #5
pittsflyer111b
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Re: 50% Hi-Max Ultralight Build

Looks great! Surprised the plans are a free download.

Bob
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Old 02-19-2017, 11:32 AM   #6
Sbenson11
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Re: 50% Hi-Max Ultralight Build

Quote:
Originally Posted by pittsflyer111b View Post
Looks great! Surprised the plans are a free download.

Bob
Thanks,

They didn't used to be,

20 odd years ago when I first got interested in this plane as a full scale project you had to buy the plans. Since then the company has changed hands twice and they now make the plans free for download. From what I understand the hope is they will get more people interested and create more sales for their kits and sub assemblies. Hope it works out for them.

Steve
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Old 02-19-2017, 06:38 PM   #7
Sbenson11
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Re: 50% Hi-Max Ultralight Build

Next on the list are the stabilizer and elevator. This certainly puts the scale of this project into perspective for me.

Steve



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Old 02-19-2017, 06:40 PM   #8
Sbenson11
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Re: 50% Hi-Max Ultralight Build

Got the stabilizer finished, all sanded and the fin test fitted.


Steve



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Old 02-19-2017, 06:49 PM   #9
Sbenson11
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Re: 50% Hi-Max Ultralight Build

Tail complete,

Got a couple of dowels for temporary braces, they will be replace with carbon fiber rods at final assembly.

Steve

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Old 02-19-2017, 07:09 PM   #10
Sbenson11
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Re: 50% Hi-Max Ultralight Build

A few small projects going on.

One of those is the landing gear, building up the two legs,


They are framed out and covered with thin plywood on both sides, in my case 3/32" plywood. Once them were assembled I clamped them together and sanded the edges on the belt sander to make sure they were exactly the same. They also had to be beveled on one end to match the fuse.

Steve









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