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Aeroic Alpenbrise 4M build

Red

Very Strong User
Finally got my hands on this beauty! I thought I would do a build log in a separate thread then Doc’s since his is more focused on design aspects.

I’ll be using GDW servos and Tomas Liu frames for this one. First impressions are holy cow this thing is big! Ive flown larger scale birds, but for a pure slope machine this has a serious presence. I love the somewhat scale reminiscent bulbous fuselage, plenty of room for even the largest batteries. Another nice feature is that if you wish to go electric, the fuse is round so you can simply cut the nose off at the appropriate diameter and install the power system of your choice.

The fit and finish is very, very nice. Everything fits together nice and tight but smooth. Control surfaces are cut cleanly on the ends and fitted with nice gap seal/wipers. The wings have ballast boxes provided in the root, and mate to one of the beefiest square joiners I have ever seen. It is provided with a nice compliment of accessories as well, including some that I would usually pay extra for from another vendor like a ballast tube and prewired harness with Graupner style connectors. Also included are servo frames (mounts) all servo covers, clevis and a nicely pre fit G-10 servo tray. All in all an outstanding value.

I stared with the tail. The rudder and elevator are using GDW DS1901C servos. The elevator install is pretty straight forward. I did have to source a ball link to fit over the 2mm joiner wire for the elevator. The linkage is quite short, but enough room to make it work. The servo/frame combo was installed all in one shot, and bonded in place with BSI rubber toughened CA, which sticks amazingly to the carbon.

The rudder was a little bit more fiddly. I wanted to keep the opening as tight as possible, so the pushrod requires a bit of a kink to operate smoothly. No big deal but I did have to assemble everything in situ. Thoughtfully, the proper length servo extensions are also included, so after a bit of heat shrink tubing over the connectors and a few more pieces to hold the wires together, they were fed down the fuselage from the rudder servo opening. All in all very easy build so far! I still need to add the radio tray and ballest tube, but the wings are up next.
 

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A few more pics of the progress so far.
 

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Looks really good.

One of the things we have found on these planes is getting the elevator nice and tight requires locking that ball link onto the elevator steel rod. If it is able to slide side to side you will end up with a lot of play as the geometry changes. Typically you need to braze the ball or use some plastic tubing to lock it from the side to side movement.
 
Looks really good.

One of the things we have found on these planes is getting the elevator nice and tight requires locking that ball link onto the elevator steel rod. If it is able to slide side to side you will end up with a lot of play as the geometry changes. Typically you need to braze the ball or use some plastic tubing to lock it from the side to side movement.
True indeed.

I thought I had mentioned that the ball had to be soldered in the instructions?
I'll take a look and amend if its not there.

For ref: The ball and wire assembly I normally leave on (same as all my planes) on disassembly and transport.

Another important thing is to make sure you use IDS on the Elevators (Red already has) which stiffens up the entire assembly in very high speed flight. Light DS for example.

The elevator sections used on my models are low drag/high response type which means that a little movement goes a long way.
Ergo: You simply dont need as much elevator travel as you might with other models, so as an insurance IDS works really well.

Cheers,

Doc.
 
I'm working on the right wing now. It is delivered with 3 servo pockets giving you the option of cutting the flap and adding a 3rd servo, I chose to stay with the more conventional 2 servo layout. Even though it is a 4M plane, the area for the aileron linkage is tight. One really nice thing is that the wings are essentially LDS ready, meaning that the sub spar and aileron/flap pockets in the surfaces are relieved by the factory. So the only fitting is to cut away the wiper for clearance, fit the control horn and bond it in place. I found that I really needed to cut down the control horns to fit in the thin aileron profile. I had to relieve the upper skin a bit as well. Annoyingly I cut a little too much away leaving larger than necessary gap, so that will be getting a cover. Oh well, I've never built a perfect plane yet, so why start now? The servo pocket is large dwarfing the GDW DS1906A servo.

The flap linkage install is a breeze. Again cut the wiper away but the servo horn fit without any trimming. This time the upper skin relief was much more tidy. The GDW DS190X servo is a bit bigger, but fits in the pocket fine. I am able to get about 70 degrees of down travel and about 20 up, so just about perfect. I installed the included wiring harness and secured the connections with heat shrink. I left the Graupner style plug loose in the wing root for now, I will secure it with silicone after everything is mated to the fuselage. Covers are held in place with a little E6000.

So right wing complete, on to the left.
 

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Left wing done. Quicker and cleaner this time as it’s just a mirror of the right.

All that is left now is to install the radio tray, fit the Rx and set CG and program it.
 

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Thanks for the inspiration Red! Will start to work on mine in a few weeks once I’m home from a work trip.
Will need your advice along the way I am sure. 1st question would be the ball link source please.
 
Thanks for the inspiration Red! Will start to work on mine in a few weeks once I’m home from a work trip.
Will need your advice along the way I am sure. 1st question would be the ball link source please.
Mine came out of my scrap bin haha. Wayne is sourcing some from MP Jet though I believe.
 
Done! final weight is 143 oz.

The cavernous fuselage under the canopy swallows anything you want to throw up there. I elected not to install the ballast tube at this time. Some buddies and I are planning a European Slope Safari in 2025, and some of the Alpine sites I have been eyeballing are best suited for electric so I plan to convert this at some point before that.

Looking at a maiden possibly Saturday at Torrey Pines. There is a swap meet in the morning, then fly when the wind picks up. Can't wait.
 

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Done! final weight is 143 oz.

The cavernous fuselage under the canopy swallows anything you want to throw up there. I elected not to install the ballast tube at this time. Some buddies and I are planning a European Slope Safari in 2025, and some of the Alpine sites I have been eyeballing are best suited for electric so I plan to convert this at some point before that.

Looking at a maiden possibly Saturday at Torrey Pines. There is a swap meet in the morning, then fly when the wind picks up. Can't wait.
Nice! Can't wait to see some video of it!
 
Done! final weight is 143 oz.

The cavernous fuselage under the canopy swallows anything you want to throw up there. I elected not to install the ballast tube at this time. Some buddies and I are planning a European Slope Safari in 2025, and some of the Alpine sites I have been eyeballing are best suited for electric so I plan to convert this at some point before that.

Looking at a maiden possibly Saturday at Torrey Pines. There is a swap meet in the morning, then fly when the wind picks up. Can't wait.
What it needs is a stonking great mega-grunt high watt power plant. I did see one guy in Europe was getting much better than 1:1 power to weight ratio for out of the hand fast vertical launches.

Dharma Drum, that thing was moving!

Doc.
 
Done! final weight is 143 oz.

The cavernous fuselage under the canopy swallows anything you want to throw up there. I elected not to install the ballast tube at this time. Some buddies and I are planning a European Slope Safari in 2025, and some of the Alpine sites I have been eyeballing are best suited for electric so I plan to convert this at some point before that.

Looking at a maiden possibly Saturday at Torrey Pines. There is a swap meet in the morning, then fly when the wind picks up. Can't wait.
Man, I wish I was down in SD for that. It’s my OG home flying site. As kids my buddies and I would get on the bus with our gliders and take about a 20-30 minute ride down there. We were pretty lucky.
 
What an amazing home slope! How cool is that.
Like I said, we were pretty lucky. I had a buddy in the 7th grade who flew and who didn't need to talk me into trying it out. Bought an Olympic 650, built it, flew it, and that's what started it all... What was it, maybe 1984? Took a long break and maybe 15 years ago I bought a Zagi and a cheap radio and would fly that above Baker Beach. And now recently I find myself back into it. The thing that's remained the same is just how friendly everyone into gliders is. One of the cooler aspects of the hobby.
 
Stop press:

First Impressions of the Alpenbrise A157 USA maiden from Red, at Torrey Pines right now:

Quote:

"OM*G it’s amazing! No ********, top 1-2 best gliders I’ve ever flown. Jesus it’s good.
Red"
Red Jensen


"Amazing flyer. Fantastic energy retention. Pings waaaay harder turns than I expected."

I think he quite likes it.

Doc.
 
Wow what a great day at Torrey! There was a swap meet in the morning while we waited for the wind to come up. It was blowing 8-10mph around noon and by the time I tossed it had climbed to about 15mph. What a fantastic flying plane! I really can't say enough nice things about it. It's very honest and easy to fly, yet when pushed its very aerobatic and surprisingly fast. It has amazing energy retention and feels super solid. I need to move the CG back a little and tweak the program slightly for better roll. The landing manners are among the best I've seen.

 
The problem with Torrey is everything looks slow there. LOL

All of Hammonds planes fly really well IMHO.As I have said, my all time favorite is the Forza, but that is probably just because I have yet to fly an Alpenbrise. :)
 
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