About Me Pages: About SgtPepper (1815)
This page is updated on April 18, 2017.

SgtPepper about me page.

My name is Eric, 50 and I'm a helicopter maintenance engineer.
I live in Holland together with 3 women (my wife & 2 daughters) who tolerate my hobby addictions.

I like to make real working Technic models which can be operated either manually/electric or by NXT.
As you might suspect looking at my username, my other hobby is collecting Beatles records & memorabilia.

In my store I sell surplus parts & items I never use.
I think BrickLink is absolutely fantastic.

Here are some examples of the things I've made.

Alouette II helicopter.
My last MOC was this Alouette II type helicopter.
I've been working on it for more than 2 years (well, on and off) and nearly abandoned it a number of times.
But I finally managed to finish it and I think it turned out rather well.

Features :
- Scale 1:14.
- All rotor controls (cyclic, collective & paddles) function like real.
- Motorised with 5292 motor.
- Free wheel function.
Dimensions :
- Length : 86 cm.
- Height : 27 cm.
- Rotor diameter : 74 cm.
Anything wrong with it?
- First of all, there are only two main-rotor-blades instead of three.
- The "Technic Ball with Grooves" (p/n 2907) in the swash plate is reworked (drilled out) to allow collective-sliding movement.
- The rotor blades are too heavy to function the way I intended it.
- A metal washer is used in the tailrotor.

More photos can be found here.
I hope to upload some detail pics in the future together with a short movie which will show the features in motion.

What started as experimenting with add/subtract-track-steering ended up as this bulldozer.
The main challenges for this model were :
- how to fit such a steering system in such a small housing
- how to find all those yellow coloured parts.
Well, for the latter (lucky for me) there is bricklink.
It took quite a few orders to get a complete set of yellow 8-tooth and 24-tooth gears.

The model runs very smooth and besides the add/subtract steering system it features :
- a 2-piston engine (ok, this is too small for a machine like this, but there just wasn't any more space left).
- a pneumatic blade control (up or down - forward push or side push).
- small track-guiding-gears following uneven surface.

More photos can be found here.

Aircraft Radial Engine.
After seeing some pictures of radial-engines on Brickshelf I decided to also have a go with this subject.
The result was this 6 cylinder radial engine on a maintenance / display dolly.

Real radial engines are single row 7 or 9 cylinder engines or double row 14 or 18 cylinder engines.
This can't be done with LEGO® parts, only an engine with 6 cylinders is possible (or 12 double row).

Although this model looks kind of fragile, it's actually quite strong and it runs extremely smooth.
But because it's a single row engine and there is no counter weight, it starts to vibrate at high speeds (500 rpm and higher).

More photos can be found here.

Front End Loader (8439).
I motorized this great model and it's completely controllable with 2 joysticks.
The left joystick is for driving (forwards / backwards) and steering (left / right).
The right joystick is for pneumatic control (4 movements).

The control unit houses :
- a battery box
- a two piston pneumatic pump
- a pressure relief valve
- two air tanks
- a pump rpm indicator
- 2 joysticks

More photos can be found here.
There is also a 'YouTube' Video here.

Prop plane (8855).
The only real problem with this model is that very poor 1-cylinder engine.
To do it justice I installed a proper 4-cylinder boxer engine on it and did some other design tuning using modern parts.
For motorizing the boxer engine I used the old style 4½V motor because of its small size and high rpm.

More photos can be found here.

Walking Robot.
This is the first model I made after I purchased the Mindstorms 2.0 set.
While it walks, it moves its arms and turns its head.
I used 3 touch-sensors to let the RCX control the 3 motors.
A lot of gear reduction is used to let it walk slow. Quick movements made it fall over.
It took me a lot of time to program, but in the end it turned out to be a fairly simple program.
In this short clip you can see how it walks.

More photos can be found here.

The picture on my ID-card is 'borrowed' from Digger Digger Dogstar

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