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Roto 85 FSI bench run

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MattyB14/04/2017 22:13:08
2073 forum posts
32 photos

We ran up Dad's new toy in his garden this afternoon, a Roto 85 FSI inline twin with my daughter on the sticks - sorry for the wobbly camera work, she was quite excited as you can hear...!

After just over an hour of total running it is hitting ~5700 rpm on 25x10 Fiela prop, making a calculated 5.7hp. It throttles like a dream with no overheating problems on the bench - it even runs nicely on one cylinder if you cut power to one of the ignition units! Obviously the challenge will be keeping it cool in the cowl of the Topflite P-51 it's destined for, but we think that is achieveable, With other ongoing projects though it is unlikely to maiden this year.

Edited By MattyB on 14/04/2017 22:23:41

cymaz15/04/2017 05:44:35
9258 forum posts
1196 photos

She's one happy bunny !party

..15/04/2017 06:16:11
974 forum posts
1 photos

lol indeed as she says "pretty cool" Mat. My young lad and myself were in a similar position on Thursday taking advantage of most of the neighbors being at work & running in an OS 120 Surpass.

The Roto looks & sounds great.

Frank Skilbeck15/04/2017 08:31:15
4736 forum posts
101 photos

Great commentary, engine sounds good too yes

Rich too15/04/2017 11:01:36
3060 forum posts
1070 photos

That sounds great yes

Adrian Smith 115/04/2017 11:01:58
2470 forum posts
1273 photos

Great stuff, Matty. Looks and sounds like a great piece of kit. Thanks for sharing the clip with us. thumbs up

cymaz25/04/2020 22:26:11
9258 forum posts
1196 photos

Marty how’s the Roto holding up? I’m thinking of getting one for a future build.

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