I have been an engine modeler for about 20 years and have also built many models myself. From time to time I also buy an engine that I like into my collection.
RMK compressionless engine built from castings
The Hubbard an American boat engine from 1912 self built.
The Musa FV1A is a replica of ETW, Red Dog, Kiwi, etc. It was called REG DOG. The original engine from ETW was changed several times, with displacements of 30cc, 15cc, and 10cc. The original standing valves were placed on the side, also the engine was available both air and water-cooled. And this Musa engine is only air-cooled. It's said that a water-cooled version will be made in the future if possible by Musa engine. In addition to new water pump accessories, water-cooling also needs to change some structures.
The Kiwi Mk2
5 Things You Should Know About Musa FV1A Engine
1. Musa has made a lot of effort for the engine, the CNC machined housing parts are of very good quality and accurate fit.
2. The most complicated part to make was the cylinder head. Because it has a complex geometry with precise machining requirements, needs to withstand extreme temperatures, and must provide reliable sealing and integration with other engine components.
3. The engine has a built-in oil pump and can now finally run without the stinky gasoline oil mixture. Because the 4-stroke engine has a separate oil lubrication system, so it doesn't need the gasoline-oil mixture, resulting in cleaner and less smelly combustion.
4. The overall appearance of the engine is very good. Classic dark green bring me back to the past.
5. After adjusting the carburetors, my engine runs much better. The idle is smooth, the throttle response is improved, and it's more fuel-efficient. Plus, emissions are reduced, and overall engine performance has been enhanced. Fine-tuning might be needed for different conditions, but it's definitely worth it.
However, the adjustment is not good to handle.
I think Musa has had some problems here to solve this to some extent, the fuel tank on the carburetor is completely missing.
According to Musa he had no influence on the running behavior ( which I doubt) and was therefore omitted.
However, the tank must now have the same height as the carburetor so that the engine can run cleanly.
That's why this ugly base with the tank on stilts was created which in my opinion is a total misconstruction because only the engine finds its place.
Later Stirlingkit told me why they cancel the fuel tank:
Initially, Musa designed this high fuel tank for the height of the fuel cup, although it looks a bit ugly. After the design was completed, the actual test and inspection found that there was installation interference, which means that if these places are not disassembled, the oil cup cannot be installed, so the oil cup can only be canceled according to the situation to prevent it from causing trouble to more customers. , will not be easy to install and start.
Overall, the decision to eliminate oil cups was based on two key factors. First of all, there is an interference problem between the installation positions of the oil cup and the carburetor, which complicates the installation process. Secondly, there are height-related problems; if the height of the fuel tank is not greater than the height of the fuel cup, the fuel cannot be effectively sucked in and atomized. In summary, the harm outweighed the benefits, leading to the cancellation of the oil cup.
On the other hand, Musa states to fill 12-15 ml of oil into the single cylinder engine, if you do that the oil comes out of all openings of the engine when running.
8-10ml is probably enough to make the miniature engine, not an oil sardine. Using more than necessary can add weight, reduce efficiency, and may not fit within space constraints.
My conclusion, a nice engine to collect and for engine modelers but where there is light there is also shadow.
let's oil the gear of life.
tested and reviewed by the Expert H. Hahn in Germany
2023/09/22
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