September 25, 2023

New O.S fourbangers

No it’s not the standard unpumped version, and not the shamefully expensive EFI. It’s a 200 FS pumped, with a new pump and fuel regulator. Should be a fantastic alternative to the YS 1.70 for people on a budget (me), people who love O.S engines (me) and people not wanting to run the 30% nitro fuel that YS requires (me also…) Have a look at this video from RC Universe (21 MB .vmw)

Also new from OS is the .81 FS-a, replacing the .70 surpass. The .81 is a new development but fits in the same bolt-pattern as the old 70. And there I was thinking to myself “what would be the perfect engine for a glow-conversion of the Sebart Angel S 50?”… And whaddayaknow, some engine company in Japan makes just such an engine 🙂

2 thoughts on “New O.S fourbangers

  1. Hello Jon,

    the new pumped OS 200 FS seems to be an interesting engine. Apart from the video at RCU, however I haven’t seen it in any shop anywhere. The only availabe engines are the expensive FI and the simple non-pumped FS.
    Where did you get your’s???

    Best regards

  2. Hi, sorry for the misunderstanding, I have the un-pumped version. I haven’t seen the pumped 200 anywhere but in that video either. Let me know if you come across it!

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