The engine can be supplied with RC carb on request.
.15 diesel (2.5cc), rated at 0.478 kW @ 24000 rpm.
Steel liner and iron (meehanite) piston
props: 7x4 7x5 7x6 8x3 8x4 8x5 9x5 8x6 9x6 8x8
use tuned silencers: 3241, 3242
(If you run with muffler, detach the muffler after running)
Fuel: 40% Ether, 40% Kerosene, 20% Castor Oil
0-2.5% IPN or equivalent may be added to the mix.
!!!! Use 30% oil for running in.!!!!
The addition of ignition improvers like IPN (Iso-propyl-nitrate) or Amyl-nitrate allows the engine to run at lower compression settings without loss in performance, and achieve higher rpm as well. Availability of these ignition enhancers may be quite difficult. Truck diesel engine fuel cetane boosters also have shown promising results. These are readily available at gas stations
For racing, IPN may replace part of the ether, or even all of it, and the oil content may be much lower by adding extra kerosene. Beware: The engine then runs much hotter, is harder to adjust, and MTBF is greatly reduced.
Be warned: Engines are easily fried this way.

(MTBF = mean time between failures, also called life expectancy of the engine)

Reverse Running crankshafts are available.

The engine can be supplied with RC carb on request.
MVVS 2,5 GFS/R - ABC cat.# 3029
0,515 kW @ 26 000 rpm
185 grams
carb 3213
muffler 3241 (GFS), power range 17,000-22,000

3242 (GFR), power range 17,000-22,000

Props: 7x3 to 8x4

€103.53

MVVS 30cc  Cat #3003
This engine has power in the 40cc engines class. (~4.2 hp @ 9200 rpm)
All external dimensions and utensils are the same as the previous 26cc engine , including the carburettor.
940 grams w/plug, but without ignition
ignition: 185 grams
Bore 35mm stroke 30mm
target rpm:
APC 18x6W 3266 Tuned pipe: 9100-9200, 3270 muffler: 8200-8300
APC 16x12 3266 tuned pipe: 8600-8700, 3270 side muffler: 7700-7800
mufflers: 3270; tuned pipe 3266
Manual download (26cc)
Engine dimension drawing (same as 26cc)
Mufflers and tuned pipe dimensions
Radial mount #3394 (60 grams and 10.5mm stand-off height) is available (see price list)
A top-notch Petrol (gas for US readers) engine, that stands up to it's claims of best in class power and ease of handling.
For carb setting instructions, click here , or check out my MVVS user corner Forum for more detailed information.
Needle bearings are provided in both wrist pin (gudgeon pin) and big end.

Item # 3095ifs      MVVS 40 IFS - (2.42 cu inch)
The ultra reliable 35ifs, rebored to 38mm, with same main dimensions, but slightly lighter.
bore 38mm , stroke 35mm
Best power: ~4.8 hp at 8500 rpm.
weight 1451 grams without ignition
Ignition weight 160 g
Fuel: petrol, unleaded 95 octane (US: unleaded premium gas 91 pump octane).
High silicon, molybdenium plated piston with cast iron piston ring, running in a hardened steel liner
Use only: Jaso FC+ or ISO LEGD class two stroke fully synthetic oil. Mix at 1:40 (running in 1:30, during the first few gallons)
Features include:
1. squish ring central hemi combustion chamber
2. Walbro Pumped Carburetor with arrested choke.
3. Needle bearings on upper & lower end of the connecting rod.
4. Huge crankshaft and bearings.
5. Molybdenium coated Ringed Piston.

Parts list
Engine dimensions
Manual download (35cc manual)
Carb setting instructions, click here

This engine is a powerhouse in ultra small package, suitable for narrow fuselages.
MVVS notes:
"
Using compact muffler 3271, a gain of 15% in power compared to the 35cc engine
Propeller 20x8 to 22”x 10” for Acrobats and up to 24”x10”  for Scale Models.
With MVVS tuned pipe and propeller Mejzlik 22”x10” we measured 7000 – 7100 RpM!
"

MVVS 50 IRS  Mounting Dimensions:181 x 71 x 122 mm
This is the enlarged version of the previous rear carb  membrane induction 45 engines. The extra displacement is achieved by using a larger bore piston for more torque and better power at lower rpm, as well as prolonged power at elevated rpm, thus widening the available power band for 3D flying of 27% to 33% planes as well as racing planes or just general purpose planes in need of maximum power in a small package.
The cast aluminium crankcase has been reinforced with a third bearing and extra stiffening ribs to resist the added power.
Product Specifications:
Rear membrane induction using carbon reed petals, Cantilever crankshaft with three front bearings.
Single cylinder with Nikasil conversion coating, and  high silicon alloy piston with Molybdenium based antifriction coating for better power, faster running in and prolonged life.
Displacement:3.0 cu in (50cc)
Bore:1.57 in (40 mm)
Stroke:1.50 cu in (38 mm)
Engine (complete, without ignition) Weight:1560 g ,( ignition weight = 190 grams)
Crankshaft Thread:M10 x 1mm
Fuel: petrol, unleaded 95 octane (US: unleaded premium gas 91 pump octane, ).
Use only Jaso FC+ or ISO LEGD+ class two stroke fully synthetic oil. Mix at 1:40 (running in 1:30, during the first few gallons)
Manual download  Engine dimensions drawing
Carb settings. Exploded view

Available MVVS mufflers:
int 45.01 canister (item #3206) slightly smaller than the 58cc type 3204
3208i: A compact side muffler for inverted mounted engine (PDF)
3208S : a compact side muffler with the same dimensions as the 3207S for 58cc
3212i: Pitts muffler
3280: Tuned pipe for 45 - 58cc (~7300 rpm with Mejzlik 24x10 prop) (80cc for high rpm use)
Carb Type:Walbro 2 Needle, basic setting L=2 turns, H=1.5 turn open
Parts list , Dimensions

MVVS 58 IRS  Cat# 3001
Bore 42mm, Stroke 42mm
weight as pictured, cpl with plug but without ignition, 1820 grams
ignition weight: 160 grams
Fuel: petrol, unleaded 95 octane (US: unleaded premium gas 91 pump octane).
High silicon, molybdenium plated piston with cast iron piston ring, running in a NIKASIL plated liner
Use only: Jaso FC+ or ISO LEGD class two stroke fully synthetic oil. Mix at 1:40 (running in 1:30, during the first few gallons)
Manual download
engine dimensions
3204 Muffler dimensions
Carb setting instructions, click here
3207 pitts muffler
Power indication using 3204 muffler systems and Mejzlik propellers:
26x10N @ 6000 rpm
24x10 @ 7000 rpm

Click here for the real power graph using the MVVS 3204 canister muffler.
These are my own tests using different mufflers setup.  The MTW TP2 produced close to 8hp power on a short header, without any peakyness. For Imac and 3D, a 400mm header gives very crisp throttle response whilst limiting top rpm.

Plugs , NGK CM6, or equivalent, with electrodes gapped to 0.5mm
Cantilever crankshaft supported on two ball bearings, rear carburetor, and reed valve induction. The high silicon alloy piston is molybdenium coated for run-in assistance and extended life, and runs in a NIKASIL coated cylinder.

The engine is made available to special order with the carby and reed block in side orientation. Horizontal or vertical is the carby valve shaft line
LH (left horizontal)
LV (left vertical)
RH (right horizontal)
RV (right vertical)

Warning:
Do not try running the engine with wide open throttle and closed choke, as this may damage the reeds due to the presence of raw fluid.

MVVS develloped their #3204 (int. 58.01) canister exhaust system in order to obtain a very flat and wide top power curve, without sacrificing usable power. This enables a range of propellors to be operated at the roughly the same peak power. The smaller props will turn faster, and have massive power reserve to accelerate to speed. This is beneficial for 3D flight which needs a very crisp throttle response for the wide blades.
The muffler part and header part are separate items. The 58cc and 116cc share the same #3204 canister. The flex stainless steel coupler construction is provided with a teflon tape coating that resists the very high exhaust gas temperatures in high performance petrol engines. This is clearly visible in the picture
Click on the picture to see the extremely broad band non-peaky power characteristics of this well designed canister, compared to the competition.

MVVS 58 IRS (3.6) PROSPORT- petrol engine (with 6.5V - 9.0V ICU-S ignition) (temp. sold as LE engines, see 3001P-LE)

props (two-bladed)
22x10 ; 22x12 ; 22x14; 24x8; 24x9 ; 24x10 ; 24x12 ; 25x7 ; 25x8 ; 25x9 ; 25x10 ; 25x12 ; 26x7 ; 26x8 ; 26x9 ; 26Nx10
props (three-bladed)
22x10 ; 22x12 ; 23x10; 23x12; 24x9 ; 24x10 ; 24x12

Like all MVVS petrol engines, the engine is equipped with a molybdenium coated piston,
Additional features:
-heavy duty bearings throughout,
-a titanium central prop drive bolt.
-redesigned crankshaft
-heavy duty connecting rod
-redesigned cylinder porting for wider power range and 5% power gain.
-piston adapted to porting changes
-Added intake horn on carburettor for improved air intake

This engine is intended for high performance aerobatic competition, and the grueling daily practice hours.
Fuel petrol, unleaded 95 octane or better (US: unleaded premium gas 91 pump octane).
oil Jaso FC+ two stroke all synthetic racing oil, Mix at 1:40 (running in 1:30, during the first few gallons)

MVVS 58 LC, Liquid Cooled engine, based on Prosport , the cooling pump is fitted to the engine.
Best available power 8.5hp, using a tuned pipe setup and rpm in excess of 7000
On canister muffler #3204, the engine is rated at 7.2hp max
Fuel: petrol, unleaded 95 octane (US: unleaded premium gas 91 pump octane).
oil Jaso FC+ all synthetic two stroke racing oil, Mix at 1:40 (running in 1:30, during the first few gallons)
Manual download

The engine is liquid cooled to allow for a higher sustained power and installing remote heat exchangers. Great for scale, and real narrow cowls (IMAGE). Ducting of the radiator airflow opens up many options to keep the engine cool.(The standard radiator as shown in the picture is not included with the engine  Special radiators can be made to order.)
The technical specifications are like those of the pro-sport engine, but due to the liquid cooling there is about 5% more power.
weight 1830 grams (with pump, without ignition)
ignition 160 grams
Radiator 120 grams
water volume 0.2 liter
This calculates to an all-up weight of 2340 grams (ignition included)
The weight increase is more than offset by the extra sustained power that water cooling provides.

props (two-bladed)
22x10 ; 22x12 ; 22x14; 24x8; 24x9 ; 24x10 ; 24x12 ; 25x7 ; 25x8 ; 25x9 ; 25x10 ; 25x12 ; 26x7 ; 26x8 ; 26x9 ; 26Nx10
props (three-bladed)
22x10 ; 22x12 ; 23x10; 23x12; 24x9 ; 24x10 ; 24x12.
Power data using Mejzlik props and 3204 canister mufflers
26x10N @ 6000 rpm
24x10 @ 7000 rpm (over it's power peak rpm)

MVVS 80 IRS (#3007L)
Bore 48mm, stroke 44mm (80cc, 4.88 cu inch)
weight : 2220 grams (without ignition, but with plug)
ICU-L ignition, Ignition weight: 160 grams
Fuel: petrol, unleaded 95 octane (US: unleaded premium gas 91 pump octane).
oil: Jaso FC+ two stroke fully synthetic racing oil. Mix at 1:40 (running in 1:30, during the first few gallons)
Manual download  Dimension drawing  (PDF)

Suggested props: two blade 26x10, 27x10; 28x10
three blade 24x10, 24x12
Recommended muffler: MTW TD110

With this engine, MVVS follows a new philosophy of a reduced stroke slightly over-square engines, in order to get a smaller overall package,
best power , at acceptable lower weight. No sacrifice to power output is evident. Design target for this engine is ~10 hp, open exhaust, sustained power.

Suitable planes:
Scale and or tow planes up to 3.0m
Aerobatic planes of  2.5 - 3.0 m
The engine as delivered includes oil, spark plug and ignition unit.
It is also available as side plug or twin spark. (two spark plugs for each cylinder)

MVVS 80 IRS - petrol engine,"sport" , single side spark plug, equipped with Bendix starter motor and modified ignition ICU-P/starter; the startermotor ESC is included.

This engine is a 80cc side plug version, modified to accept a special design starter motor (by MVVS) The starter motor is driven by a modified ICU-P ignition, which controls the starter operating mode. It shuts off the starter when the engine runs, and prevents further starting until the engine stops again.
The engine as delivered includes oil, starter motor+sprockets, motor drive ESC, spark plug and special ignition unit. (for 3S LiPo)

Suitable planes:
Scale and or tow planes up to 3.0m
Aerobatic planes of  2.5 - 3.0 m

Starter in action

MVVS 80 IRS-TS - petrol engine "sport" with twin spark plugs, bore 48 stroke 44, weight 2245 gr, ignition ICU-B, (210 gr.)
The extra spark plug boosts power by 5%
Suggested props: two blade 26x10, 27x10; 28x10
three blade 24x10, 24x12
Recommended muffler: MTW TD115
With this engine, MVVS follows a new philosophy of a reduced stroke slightly over-square engines, in order to get a smaller overall package,
best power , at acceptable lower weight. No sacrifice to power output is evident. Design target for this engine is ~10 hp, open exhaust, sustained power.
The Twin Spark layout follows full scale engines practice for improved reliability
Suitable planes:
Scale and or tow planes up to 3.0m
Aerobatic planes of  2.5 - 3.0 m
The engine as delivered includes oil, spark plug and ignition unit.
It is also available with twin spark. (two spark plugs for each cylinder)

MVVS 116 IRS 116cc (7.2 Cubic inch), Boxer configuration
Power output 11 hp @5900 This is from the Dyno tested power curve using #3204 canisters,30x10 Mejzlik, and confirmed by users.
bore 42mm, stroke 42mm,
weight 3220 grams including ignition and battery, but without propeller.
Ignition 210 grams
Fuel: petrol, unleaded 95 octane (US: unleaded premium gas 91 pump octane).
oil: Mobil 1 2T or equivalent two stroke fully synthetic racing oil. Mix at 1:40 (running in 1:30, during the first few gallons)

Suitable mufflers are Int58 by MVVS, TD75(K) or TD115 by MTW
Suitable tuned pipes are 3280 (MVVS) and RE2 (MTW)
MVVS has made a new back mount with solid standoffs for the 116cc engine , item 3365 ( picture 1 ; picture 2 )

Manual download
Engine dimensions drawing
factory data with MVVS #3204 muffler setup and Mejzlik props:
30x10 @ 6100 rpm
Engine width over the plugs is 330mm. Get the dimensions and the exploded view here. Rearview , sideview , planview
Click here for the real power graph using the MVVS 3204 canister mufflers. This is a field setup any modeller can reproduce.
The engine is based on the 58 prosport cylinder/piston design.
In addition, a lot of engineering went into internal mixture flow balancing to get the cylinders load balanced and avoid one cylinder running hotter than the other.This work resulted in a unique design called Air System (entry flow control manifold) to balance the mixture to both cylinders, and thus provide silk smooth operation. This also is the main reason for the massive power output and extremely low vibration levels. Looking at the induction manifold exterior shape gives an impression of the effort put into the design of this engine.

MVVS 116 IRS - liquid cooled petrol engine (7.2)
Max rpm/power 14hp@7000rpm (With RE2 tuned pipes)
Built as special by PRME for prolonged high output power applications.
The engine is Liquid Cooled, and needs a water pump, water coolers and appropriate plumbing to operate. (not included)
This engine is made to order.
Electric driven pumps are available as computer hardware. So are the coolant radiators. Proposed is to use a computer waterpump with 400 liter/hour capacity at 4 meter water pressure head, and a 120mm (three fan) computer radiator with 1000W capacity.

MVVS 152 IRS 152cc, (9.28 cu inch) Boxer engine
bore 48mm, stroke 42mm,
weight 3740 grams (complete engine as shipped with sparkplug and ignition).
Ignition ICU-B (9.3 - 13V = 3S LiPo), weight is 210 grams
Fuel: petrol, unleaded 95 octane (US: unleaded premium gas 91 pump octane).
oil: Jaso FC+ two stroke fully synthetic racing oil. Mix at 1:40 (running in 1:30, during the first few gallons)
factory carb (Walbro WB27) needle setting: L= 3/4 (@ closed throttle,  H=7/8

Suitable mufflers are the Int80 by MVVS, TD110 or tuned pipes TP3 by MTW
MVVS has made a new back mount with solid standoffs for the 116cc engine , item 3365 ( picture 1 ; picture 2 )

Dimension drawing (PDF)
The engine is based on the 116cc crankcase, and the short stroke 80cc cylinder/piston design, with even further reduced stroke for most compact packaging. Crankcase parts however have been totally redesigned to fit the larger engine capacity, so they will not fit the 116cc engine.

A further devellopment of the very powerful 116cc along the shorter stroke philosophy, this engine is targeted at about 17 hp open exhaust sustained power, not useless peak peek readings which may exceed sustained power by 20%.
Suitable planes:
Scale (30 kilo) and glider tow planes of up to 25 kilo weight (55 - 66 lbs)
3D Aerobatic planes of 3.0 - 3,5 m
The engine as delivered includes oil, spark plug and ignition unit.
It also ís available with twin spark. (two spark plugs for each cylinder as shown on picture)

MVVS 152 IRS 152cc, (9.28 cu inch) Boxer engine
bore 48mm, stroke 42mm, twin spark

MVVS 320 4-cylinder boxer engine prototype (final engine may be different)
Bore/stroke 48/42
weight ~7600 grams
Ignitions 2x 210 grams

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