With respect to the availability of OPS aero & marine engines in North America, it would be fine to find a company or a business person that will start selling them again (after Shamrock, Tower and others have stopped distributing these high quality OPS products years ago). In Europe for example there's a constant demand due to advancing serious speed competition within the different FAI regulated F3S classes. In fact no other commercially available speed engine to be used in the F3S-C class (6.61 to 10.00 cc, this is the class to break speed records) is as powerful as the 5-ports OPS .60 Super SPP VAE.
When looking for OPS 1.20 RIRE suitable commercially available speed planes there's only a small number of choices:
[ul][*]
Messerschmitt ME 163 B 1a Komet by Sunshine-Wega[*]
Cobra by Fliegerland[*]
Phenom by Oakdale Aircraft[*]
Mirage 2000 by RC-Tronics-Topp-Rippin OHG [*]
F-102 Delta Dagger by RC-Tronics-Topp-Rippin OHG [*]
ME-163 Komet by RC-Tronics-Topp-Rippin OHG [*]
Blizzard by generic-fly
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The above fast and rugged composite planes represent acquirable speed planes
[ul][*] that will cope with the outstanding 5.5 HP power output of the OPS 20 cc ducted fan engine (#86115) and also [*] whose aerodynamics will allow the required small prop turning at 20K+ to transfer rpm into top speed efficiently. [*] Some of these above listed speed planes are true 200mph+ aspirants with the right engine / carbon fiber prop combo!
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For details please take a look at this thread
[link=http://www.rcgroups.com/forums/showthread.php?t=1085012]150 to 200 mph+ speed planes => Where to buy them? - An overview[/link]
containing a list of quality composite speed planes.
P.S. These OPS 15 and 20 cc RIRE ducted fan speed engines basically are bored-out OPS .80 (5+2 ports) siblings weighing almost the same. They come with additional tungsten weights implemented into the counter-weight of the crankshaft. The familiar needle-bearing conrod of the OPS .67 and .80 has been taken over as well as the (optional) drum valve induction unit. In consequence these âsuper short-strokeâ engines won't achieve more top rpm than the OPS 80, but they offer more punch to turn slightly more prop pitch with authority than the 13 cc OPS .80.