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OS 90FS and OS91 Surpass in a twin

Old 03-27-2015, 10:47 AM
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Antares100
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Default OS 90FS and OS91 Surpass in a twin

Hi Bax (and anyone else who may want to respond),
I have an old FS90 and FS91 Surpass. Is there that much difference between the two engines that they could not be used together in a twin engine airplane? If so, I would look for another of either, but interested in your thoughts. Both would be broken in from scratch. Thanks in advance!
Old 03-30-2015, 07:40 AM
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Bax
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Their power output is significantly-different. The FS-91 Surpass has quite a bit more power, so it's not really a good idea to mix them in a twin.
Old 03-30-2015, 07:11 PM
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Thanks, Bax. Had an idea that was the case but had to ask. Thanks for your time.

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