'Other' Constructional and Allied Systems Info & Downloads

Select System Type      Select Country       (812 systems found)

Mladost(1)
Mladost(2)
Musala
Mekhanichen Konstruktor
Elektromekhanichen Konstruktor

Mladost is the western alphabet form of 'Младост' which means 'Youth' in Bulgarian. This is a metric Meccano-like system, with many parts similar to Merkur. It was made in Bulgaria by Vasil Petleshkov, Bratsigovo, Bulgaria, from at least the the 1970s to the 1990s. The system appears to be known under a number of different names.

The majority of the sets and/or instructions have a stylised 'Младост' (Mladost) logo on them. There are two versions of this logo. They do look quite different, but in fact they consist of the same Cryllic letters. The cursive (handwritten) forms of some Bulgarian Cryllic letters can be totally different to the standard printed versions. E.g. the cursive (handwritten) version of the printed Bugarian Cryllic 'т' is very similar to the English language letter 'm'. Think that the first logo was used in the 1970s to early 1980s and the second one in the 1980s into the 1990s.

   

Musala (Мусала in bulgarian) was a range of 'Mladost' sets from the late 1970s into the 1980s that appear to be a close copy of some Merkur sets. Note that 'Musala' means 'near God' or 'place of prayer' and is the name of the highest mountain in Bulgaria.

Mekhanichen Konstruktor (Механичен конструктор in Bulgarian). Some 'Mladost' sets have been called this because they have have 'Механичен конструктор' beside the name of the set.

Elektromekhanichen Konstruktor (Електромеханичен конструктор in Bulgarian). Some 'Mladost' sets have been called this because they have have 'Електромеханичен конструктор' beside the name of the set.

Note - See 'Rodopi' for a system very similar to Trix made by the same manufacturer.


Manufacturer / Distributor

Fabrika Vasil Petleshkov, Bratsigovo, Bulgaria


Info from the Metal Constructional Systems Database for MLADOST[1]

Maker
V. Petleshkov
System Type
Hole pitch <12.7mm
Country
Bulgaria
Dates
known in 1989 to 1990s
Material
 
Thread
M4; M3 (see comment *1)
Boss Type
 
Boss Thread
----
Diametrical Pitch of Gears
32 (see comment *2)
No. of Parts in System
71 (see comment *3)
Hole Pitch (Spacing) (mm)
10.0
Diameter of holes in Strips(mm)
4.3 (see comment *4)
Diameter of the Bore in Bosses(mm)
 
Diameter of Axle Rods(mm)
3.6 (see comment *5)
Types of Nuts and Bolts
Nuts: hexagonal
Bolts: pan (slotted)
Material/Finish of Nuts and Bolts
Steel with a Brass finish
(see comment *6)
Size of the Nuts across Flats (mm)
7.0(see comment *7)
Bolt diameter (mm)
7.0(see comment *8)

Comments
Wrongly MOADOST in MCS. Parts for theme sets/models, first thought like MERKUR.. *1 A few M3 N&B. *2 Mod .8. *3 At least. *4 Some ≈4.8. *5& 3.5, later? *6 8mm Bolt: FW. M3: Nickel plated steel. *7*8 M3: 5.0.

The MCS document for this system is shown below. It can also be downloaded to your computer if desired here

NOTE : If the MCS document does not appear in the window below, then refresh the page.

The report can be zoomed into, made full screen or downloaded as a pdf document by using the controls provided



Manufacturer / Distributor

Fabrika Vasil Petleshkov, Bratsigovo, Bulgaria


Info from the Metal Constructional Systems Database for MLADOST[2]

Maker
 
System Type
Very like Meccano
Country
Bulgaria
Dates
 
Material
 
Thread
 
Boss Type
 
Boss Thread
 
Diametrical Pitch of Gears
 
No. of Parts in System
 
Hole Pitch (Spacing) (mm)
 
Diameter of holes in Strips(mm)
 
Diameter of the Bore in Bosses(mm)
 
Diameter of Axle Rods(mm)
 
Types of Nuts and Bolts
Nuts:
Bolts:
Material/Finish of Nuts and Bolts
 
Size of the Nuts across Flats (mm)
Bolt diameter (mm)
 

Comments
Diff looking set, parts to MOA1. Lid with multi-colour drawn models, Strips in Set bright, Plates blue. Manual cover with blue/white Racer in orange circle. Set name on lid & cover may mean Do-It-Yourself.

Manufacturer / Distributor

Fabrika Vasil Petleshkov, Bratsigovo, Bulgaria


Info from the Metal Constructional Systems Database for MUSALA (MUSZALA in MCS/NZ)

Maker
V. Petleshkov
System Type
MERKUR type
Country
Bulgaria
Dates
1977 to 1980s
Material
Steel
Thread
M4
Boss Type
single-tapped
Boss Thread
M3
Diametrical Pitch of Gears
--
No. of Parts in System
38
Hole Pitch (Spacing) (mm)
10.0
Diameter of holes in Strips(mm)
4.1
Diameter of the Bore in Bosses(mm)
4.1 (see comment *1)
Diameter of Axle Rods(mm)
3.4 (see comment *2)
Types of Nuts and Bolts
Nuts: hexagonal
Bolts: round (slotted)
Material/Finish of Nuts and Bolts
Steel with a Nickel plated finish
Size of the Nuts across Flats (mm)
6.9
Bolt diameter (mm)
6.7

Comments
Parts similar to MERKUR [1] except 38 & 62mm Pulleys. But Ni, olive finish (Angle Girder red-orange in one set). *1 Some 3.9-4.2. *2 Also 3.5.

The MCS document for this system is shown below. It can also be downloaded to your computer if desired here

NOTE : If the MCS document does not appear in the window below, then refresh the page.

The report can be zoomed into, made full screen or downloaded as a pdf document by using the controls provided



Manufacturer / Distributor

An unknown company from


Info from the Metal Constructional Systems Database for ELEKTROMEKHANICHEN KONSTRUKTOR

Maker
V. Petleshkov
System Type
as CONSTRUCTION
Country
Bulgaria
Dates
known in 1986 (some significant doubt)
Material
Steel / Plastic
Thread
M4
Boss Type
single-tapped
Boss Thread
M3
Diametrical Pitch of Gears
--
No. of Parts in System
45 (see comment *1)
Hole Pitch (Spacing) (mm)
10.0
Diameter of holes in Strips(mm)
4.4 (mean)
Diameter of the Bore in Bosses(mm)
4.0 (see comment *2)
Diameter of Axle Rods(mm)
4.0 (see comment *3)
Types of Nuts and Bolts
Nuts: hexagonal
Bolts: pan (slotted)
(see comment *4)
Material/Finish of Nuts and Bolts
Steel with a Nickel plated finish
Size of the Nuts across Flats (mm)
6.9
Bolt diameter (mm)
6.8

Comments
4 sets to make Helicopter, Biplane, Windmill, Robot. *1 In Helicopter set. *2*3 Also 3.5mm.*4 hex nut and slotted cheesehead bolt in Robot set.

Below there are manuals/leaflets which can be downloaded by clicking on the appropriate image.


A photo of a Mladost Auto Konstruktor set
(Added 121/07/2021)

Photos of a Mladost Starship set. This is described as a 'Mechanical constructor with inertial mechanism'
(Added 21/07/2021)

Photos of a Mladost Mechanic 2 set
(Added 121/07/2021)