Links to MVVS pages and information

The unusual rotation feature of the S/R type engines allows either side or rear exhaust configuration. Choose side or rear exhaust configuration according to your preference, before you run the engine for the first time.
Since 2001, the engines are produced on modern CNC machines and hand-assembled to obtain best fits. Pride of ownership is not a stranger at MVVS.
The piston fit may be quite tight, so give the engines the running in that is needed. You will be rewarded for your patience by above average power and excellent longevity.

Unless otherwise stated in the engine description, the fuel for these engines, as advised by MVVS, consists of 80% methanol (at least 98%pure), and 20% castor oil. Up to 5% nitromethane max. can be added to the standard fuel.
For the large ringed 1.60 glow engine, use at least 15% high quality glow fuel oil, and 5-10% nitromethane.
The small sizes of 2cc up to 4.6cc will not run well using synthetic oil. Use at least 50% castor oil in the mix. If you insist on using synthetic oil without adding Castor oil, be prepared for a long running in period. Sometimes the engine even will not perform at all, until you switch back to Castor oil.
As noted before, the fuel can be made up with up to 5% Nitromethane. If you want to use more nitromethane, the head should be shimmed with an extra gasket in order to lower the compression ratio, or better still, use a lowered compression combustion button or reworked head.
As a glow plug for general use I recommend the types Novarossi #5, Enya #3, OS#8 or OS-F. These are all available at the better model airplane suppliers worldwide. The engines are supplied with a Novarossi plug fitted. For the combat competition engines the Novarossi #5 and #6 plugs are best.
For running glow engines, download my one page flier here (based on MVVS instructions).
This is the MVVS documentation as supplied with each engine 3.5cc - 15cc
For use of a Walbro carbs with glow fuel, read the Walbro technical report first.  PRME does not stock engines equipped with a Walbro carb. They will be ordered on demand.
For running in glow engines, read this!

A word about the MVVS tuned mufflers: These are very much like the normal single chamber mufflers, except their volume is tuned to the engine. Back pressure is increased, and power output is about equal to open exhaust running. It is possible to modify these mufflers with added second muffler chamber (like the A-types) for ultra-quiet operation to as low as 74 dB(A) at 7 meters. (84dB at 9 ft) The added muffler should only slightly increase backpressure, and then improves power by about 200 rpm. The added muffler removes the high pitched note from the exhaust sound using the low-pass filter technique.

Klick on the thumbnail for a larger image of the engine.
Unless otherwise stated, all engines are supplied without mufflers. Suitable mufflers are suggested with most engines

.11

.15

To special order:
.25 combat (ACES)
Recommended props:
8x6; 8x7; 8x8
9x4; 9x5; 9x6
for ACES competition:
9x5; 8.5x5.5

PRME/MVVS 4,0 GFS/R ABC RC combat
0,75 kW @ 20,000 rpm
301 grams
tuned muffler 3243(GFS) and 3244(GFR) for 13000-18000 rpm

Based on the .28 and .21 engine, This ACES legal short stroke engine was originally built by PRME for RC aircombat's largest planes under ACES regulations, using a .21 crankshaft. A 9x5 prop gives excellent results, and turns right up to the allowed limits.
The timing is quite moderate for low end grunt, whilst the rpm range is still adaptable between 12,000 and 20,000 rpm using the appropriate muffler system.This engine makes light work with planes of up to 1500 grams (3 lbs), where the original warbird had in excess of 25 square meters wing surface

The ACES-legal .25 engine is still produced to order by MVVS.

.28  glow
.

MVVS 4,6 GFS/R -ABC- RC (.28) cat.# 3047
0,8 kW@ 17000 rpm
280 gr
carb 3216
muffler: 3243(GFS), 3244(GFR)
props 9x5 up to 10x6

.40 glow

MVVS 6,5 GFS/R - ABC - RC #3066
0,92kW @  15000 rpm
372 gr
carb 3216 3217
tuned muffler 3248 (GFS) for 10,000-14,000 rpm

3249 (GFR) for 10,000-14,000 rpm


props:
9x6, 9x7, 10x5, 10x6

This engine is famous for it's crisp throttle response and low idle.

RCME report page1
RCME report page2
RCME report page3

MVVS 10 GFS/R - ABC - RC cat #: 3090
bore/stroke 23/24
1.30 kW @  15000 rpm
549 grams
carb 3219
MVVS manual

Mufflers:
3255N, keep rpm higher than 9500


tuned pipe: 3250  for 9,000-12,000 rpm


props: 15x6, 14x6, 14x7, 14x8, 13x7, 13x9

.77 glow

MVVS 12,7 GFS/R - ABC - RC #3092
bore/stroke 25/26
1.66 kW @ 13 000
565 gr
carb 3219
Mufflers:
See .61 engine.
props
16x6, 15x7, 15x6, 14x6 - 14x8, 13x7 - 13x9

As the old saying goes – "there is no substitute for cubic inches." This is exactly what MVVS had done with their MVVS .77, i.e., increase the bore of their existing .61 from 23mm to 26mm, with both engines sharing the same crankcase and cylinder castings. The results in the .77 having the same physical size as the .61 with the same mounting bolt pattern, etc., but actually weighing a fraction less.

_.91 glow

MVVS 15 GFS/R - ABC - RC #3089
bore/stroke 27/26
1.8 kW @11000rpm
552 gr
carb 3222
Mufflers: See .61 engine
props: 14x7 to 15x10
A stump-pulling beauty, this engine is designed to fit in the space of a standard 10cc (.61), and drops right in. It is lighter than the MVVS .61, #3090 and may well help you comply with those ever increasing imposed noise limits, because it makes light work with pulling large props at around 9500 rpm.

MVVS 26 GFS - RC cat. # 3094G
2,9  kW @ 9000 rpm, max rpm 10000
836 grams
Mufflers: 3266 (tuned pipe) and 3270, (side muffler)
props: 16x12,  17x10, 17x11, 18x8, 18x10, 20x6
Ringed piston in steel liner. This is the glow version of the petrol engine. and replaces the previous 1.50. The connecting rod is bronze bushed.
The fuel for the bronze bushed engines needs at least 15% high quality oil.
See the instruction leaflet.