Hacker Models New Micro Magic ARTR - Product Review and Build Notes

Hacker Models New Micro Magic ARTR - Product Review and Build Notes

Jan 29th 2021

Magic Micro Product Link:

Product Review and Build Notes for the Hacker New Micro Magic ARTR

Author: Mike Eades

This is an excellent, in depth review of the Hacker nMM ARTR with extensive build notes. It is important reading for everyone, as it shows that we now have a very well-built, light, and fast ARTR. Mike is two-time US National Champion and knows the subject here well!

Product Review etc. -- Hacker nMM Article for MY #204 Final

Building the Hacker new Micro Magic Kit

Author: Greg Norris

Another important article. An in-depth review of the Hacker nMM kit with lots of very specific build recommendations. Again, important reading for everyone, as it describes the highest quality MM kit ever available. Greg is the current US MM National Class Secretary.

nMM MY204 kit build 20210124

A New Version of the Micro Magic Class Rules

The link below will take you to the newest version of our class rules. This version is unchanged from the previous versions, except that I (Greg Norris) had used an antiquated sail diagram. My error completely and I apologize. Happily, Geert Middel made a nice new version of the sail diagram and I have replaced the antiquated version of the sail diagram with this new one. Thank you, Geert!

Obviously, this version of the MM Class Rules replaces previous versions. And as always, comments, criticism, and/or requests for edits are welcome. Just contact us at mmsailinginternational@gmail.com.

MMI Class Rules 2021-01-06

A New Set of MM Class Rules

"We have updated the MMI Rules to include the new MMs from Hacker Model Production. We have also added a new rule, 6.2, to prohibit additional telemetry in the class.

MMI Class Rules - 2020-12-27 (superseded -- see above)

As always, please contact us at mmsailinginternational@gmail.com with any comments, suggested changes, or complaints.

Adhesives for the Hacker New Micro Magic - Glues Easily Available in the US

Author: Greg Norris

This article is intended to be used in conjunction with Geert Middel's careful quantitative adhesive testing below. It exists solely because European adhesives are not sold under the same brands and names in the US.

Adhesives for the Hacker New Micro Magic (article)

Adhesives Easily Available in the US

Adhesives for the Hacker New Micro Magic (spreadsheet)

Adhesives Easily Available in the US

A Careful Test of a Variety of Adhesives for the New Micro Magic

Author: Geert Middel

Hacker New Micro Magic Construction Instructions

This is in Czech, German, English, French, and Spanish. The illustrations and diagrams will be of interest to everyone.

Link to Construction Instructions

Some Build Notes and Pictures for the Hacker nMM Kit - Elmer Boon

This is a nice, brief, and extremely useful article, and the pictures will interest everybody!


Hello Friends,

Here are some photos of the nMM that I built as if it were a Hacker nMM Kit from the final MMI approved prototype hull, deck, keel case, gooseneck and canopy. The rest of the parts are home made.

You can see a good solution for the leaking canopy: I fixed 1.5 mm closed cell soft rubber with an extra 1 mm of this material in the front part of the gutter because the forward gutter is deeper. I also fixed a 1.5 x 5 mm of this material in the edge of the canopy. This way only a minimum of water can ingress in the gutter. I used stiffer toggles for the canopy to close and screwed them closer to the edge of the gutter.

I thought it was better to add 2 deck reinforcements. One in front of the canopy made in the shape of a wishbone made of 1.5 mm carbon staff and one behind the canopy connecting the bottom of the cockpit with the deck near the hull made of 2 pieces of credit card. Both very light, but improve the structure.

I raced the nMM twice over two days in 2 to 3 Bf (5-10 knots) against my 3 training partners and we concluded it is equal with their Graupner 2014s [the standard mark 2 or racing MM used almost everywhere]. I used my Graupner keel and rudder to be accurate in my assessment of the hull alone. Soon I will repeat the test with the keel and rudder from the Hacker nMM kit.

With 2 light servos I had to add 57 grams of ballast, lying alongside the back part of the keel case at the hull bottom.

I am very pleased with her good looks and building was quite easy, because all parts fit better than we are used to.

About the ARTR as seen behind the nMM in the pictures, I feel very sorry that it is not yet what we were hoping for, but it is for sure far better performing than her ARTR Graupner sister!

The latest news is visible on the Hacker website: separate parts are available now.

I hope I inspired you now to get going in these Corona times to build yourself a new MM! It is really much more simple than we were used to with Graupner.

Elmer Boon

Build Notes and Pictures for the Hacker New Micro Magic Kit - Martin Clemens

Supplementary information on the construction of the New Micro Magic ARTR

There may be some minor bugs in the first series of the New Micro Magic. "Possibly" I write, because the Hacker company has already changed some things in the meantime.

For all following points: Some things are important, others less so. And since it is not exactly known which production series your boat comes from, you should check these points carefully before starting the construction.

Of course, everyone decides for themselves how to build their boat. My remarks are explicitly only my personal estimations!

The term "building step no. XX" refers to the numbering of the building steps in the building instructions of the Hacker company.

In the coming weeks there will be news and additional documents on the MM websites, please check there every now and then!

The first boats have been delivered!

Now to the details:

Height of the eyelet for the passage of the jib boom fastening cord on deck, construction step 10

Shorten part 10 by 3-4 mm before installation or change the cutouts for the wire in part 9. The wire eyelet only needs to have the height above the deck at which the fixing cord incl. adjuster (step 60) fits through. Otherwise the distance of the jib boom from the deck is too large.

Stop of the jib boom fastening cord, building step 14 / 57

Part 18a in construction step 14 and the corresponding screw should be included. If not yet available, simply screw a small screw into the deck at a distance of 50 mm from the midship line and fasten the string there.

Fixing the canopy, building step 66

The canopy is pressed into the frame in the deck by parts 46 in step 66. If you have parts 46 in ABS 1mm, you have to double them with a second layer of ABS made of leftover pieces. Otherwise the pressure will not be sufficient to insert the hood waterproof.

Bonding the keel box step 4, and the rudder coker step 9

- ARTR Kit

The correct adhesive is important for bonding these parts (surprise ...). I have always used Stabilit Express from Pattex. But there are certainly other products. In any case, it is an important aspect in this step of the construction process.


After leaks occurred at these bondings in one of the first ARTRs under high load, Hacker revised this step and inspected the product before delivery.

Should this problem still occur when sailing your boat, it is a suitable method to carefully rework these glued areas in the hull all around with super glue.

Rigs of the rMM do not fit on the NMM, the mast fitting (part 22) has been changed

Since it is essential to maintain compatibility with the old rigs and their fittings, a suitable fitting is already in production. This means that the rigs used so far can be used without any further changes.

But since the New Micro Magic comes with a complete rig and sail, you can build it up first. And if you want to stay with the modified mast system, you will soon be able to order a set of the necessary fittings from Hacker.

Counterweight for the jib boom, construction step 54, part 40

Here there was a misunderstanding during the conception - this part is indispensable. The Hacker company is in the process of supplementing the production. For the time being, all that remains is to create an appropriate part yourself or to use old parts of the MM.

Part 40, which will be glued to the jib boom, already has the appropriate hole for the axis of the jib weight.

Parts for the jib weight

Attach the sail servo board detachably to the keel box, building step 6

- ARTR Kit

The sail servo board should be glued into the guide on the keel box at the moment. I advise against this, there are considerable circumstances if something has to be done to the RC installation during operation.

Hacker is currently considering a modification - for the time being you have to decide how to build. I recommend to glue a piece of plastic to the keelbox as a counter bearing for a small screw. Then you just slide the sail servo board into the guide and fix it with the screw.


Here the boat is delivered with the sail servo board already glued in. The only alternative is to cut off the board so that you can attach a second frame to the rest of the board to hold the sail servo and possibly the RC receiver.

The included sail servo arm has sharp-edged brass guides for the mainsheet, construction step 25/26

To avoid damage to the mainsheet, these eyelets must be clearly rounded and deburred. Alternatively, build a solution as shown in the photo.

Sheet passage of the jib sheet protrudes too high above the deck, part 17, construction step 13

Shorten the protruding tube of the part by 2 - 3 mm before installation.

Sheet guides have surfaces that are too rough, part 17, steps 13 and 22

These holes must be slightly widened with a suitable drill to remove the rough surface. The ends must be well smoothed and rounded.

Keel does not have the optimal profile

This has a significant impact on the performance of the boat. This is why cMM keels were always in demand, even when the rMM was no longer in production.

This can be remedied by grinding the leading edge rounder and sanding the outgoing profile thinner

Rudder does not have the optimal profile

This also has a significant impact on the performance of the boat. This is why cMM oars were always in demand, even when the rMM was no longer produced.

This can be remedied by grinding the leading edge rounder and making the outgoing profile thinner

Sheet connection on jib boom and main boom, construction step 64

The current solution needs more parts and in case of doubt it will sag under the booms, so it may get stuck on the foredeck or the canopy.

A suggestion for simplification can be seen in the photo of a corresponding rig.

The U-shaped clamps slide too easily, parts 37 and 45

This is a known problem. The friction between these clamps and the CFRP pipe is too low. You can also use these parts just to fix the string and then fix the unit with silicone tube. Is finally a simplification, execution you can see on the photo of a corresponding rig.

Masthead is too heavy, construction step 39, part 32

Due to the lever arm, any unnecessary weight on the mast top must be avoided. Therefore you should shorten the part of the metal arm (part 32) which is inserted into the mast to 1.5 cm.

The brass eye in the luff corner of the foresail is too far from the luff of the jib, building step 55

This has a negative effect on the position of the foresail, this connection should be as close as possible to the luff of the jib. You can modify this according to your own ideas, it may not necessarily be necessary to use a brass eyelet

Fixing the rudder shaft for easy movement, construction steps 28 - 31

If the distance between the rudder lever on the rudder axis and the rudder coker is too small, the rudder may become stiff

A suggestion can be seen on the photo, a small spring (ballpoint pen nib) is installed under the rudder arm

Have fun with the New Micro Magic!

November 2020 Martin GER 30

A general note on the history of the nMM by Martin Clemens of MM Germany

Micro Magic - was there something?

The future of the Micro Magic class was uncertain. Like other modeling activities, it suffered from a decline in general interest. But with the end of the boat production by the Graupner company the end seemed to be sealed sooner or later.

That is why it sounded unreal when in 2019 the Czech model building company Hacker Model Production a.s. announced to Micro Magic International Office its interest in the production of a new boat for the Micro Magic class.

The company boss with the latest product

The New Micro Magic on a test drive

Months of work on this project followed - during which time the Corona pandemic broke out. But the Hacker company did not let itself be put off and, with the support of some people (Elmer Boon and others) from the MMI sector, used its skills to bring the "small but nice" Micro Magic, which Thomas Dreyer designed in 1998, back onto the market with a new freshness.

The boat that stands for recreational fun - not too expensive, simply built, easy to transport, offering great sailing fun. An interesting field of activity for hobbyists, challenges in regattas for sailors. And for recreational captains a guarantee for beautiful days on the lake. Behind it, an international and well-connected community that has grown over two decades, as well as thousands of boats.

So now there is a New Micro Magic! A few months ago, after being tested by the Micro Magic International Office, the boat was approved according to the MMI Class Rules for regattas of the class. Old and new boats are largely identical and, if built according to the Micro Magic International Class Rules, can be considered one-design boats.

The manufacturer has started production of the New Micro Magic in initially 4 variants. The boat can be ordered online on the Hacker website, and sales through local dealers have also begun.

The international Micro Magic website as well as the various national websites offer all information about the boat, its construction and operation, and events. There are forums where you can exchange information with other Micro Magic sailors.