Crighton CR700W unveiled. 220hp rotary engine
Discussion
Crighton Racing finally lifted the curtain to the new bike they've developed. Only 25 to be handbuilt by Brian Crighton
220hp
142nm Torque
129.5kg dry
£85,000
Looks fantastic and I can't wait to see some proper footage of it.
Their website here
https://www.crightonmotorcycles.com/
Mod edit:
Mod edit
prematurely 
Krikkit said:
five50 said:
Was he the engineer behind the early 90’s Norton rotaries?
The frame spars look a bit like a 90’s Spondon set up…
Seems like it from a bit of digging. The frame spars look a bit like a 90’s Spondon set up…
If it sounds even half as good as the Norton that did the TT a few years ago this thing will be pretty special.
Very clever guy and no doubt this will shift along quite nicely
It looks stunning and as an engineering project it's amazing but ...
Getting big bhp out of a rotary engine has never really been in question. It's the rotor tips that have always been the issue. A bike that needs a complete rebuild every 3000 to 5000 miles to maintain it's performance is what killed off previous rotary's and I don't see how this is going to be any different. If it is only ever intended to remain as an engineering show piece then it is superb. If it's to be a realistic option for both race teams and road users (even in very limited, exclusive numbers) then it'll need to show that the tips wear issue has been addressed.
Getting big bhp out of a rotary engine has never really been in question. It's the rotor tips that have always been the issue. A bike that needs a complete rebuild every 3000 to 5000 miles to maintain it's performance is what killed off previous rotary's and I don't see how this is going to be any different. If it is only ever intended to remain as an engineering show piece then it is superb. If it's to be a realistic option for both race teams and road users (even in very limited, exclusive numbers) then it'll need to show that the tips wear issue has been addressed.
black-k1 said:
It looks stunning and as an engineering project it's amazing but ...
Getting big bhp out of a rotary engine has never really been in question. It's the rotor tips that have always been the issue. A bike that needs a complete rebuild every 3000 to 5000 miles to maintain it's performance is what killed off previous rotary's and I don't see how this is going to be any different. If it is only ever intended to remain as an engineering show piece then it is superb. If it's to be a realistic option for both race teams and road users (even in very limited, exclusive numbers) then it'll need to show that the tips wear issue has been addressed.
I'm sure I read somewhere a while ago the issue with the rotor tips had been resolved with modern materials? I was also once told that it was mainly an issue on lesser used machines, so you're better off buying a higher miles bike? My old boss did his PHD on rotary engines and went and spent a lot of time with Norton in the F1 days. He reckoned he spent time on the dyno with them and you could rest a £1 on its edge on top of the engine while it was being tested and it was so smooth it wouldn't fall over!Getting big bhp out of a rotary engine has never really been in question. It's the rotor tips that have always been the issue. A bike that needs a complete rebuild every 3000 to 5000 miles to maintain it's performance is what killed off previous rotary's and I don't see how this is going to be any different. If it is only ever intended to remain as an engineering show piece then it is superb. If it's to be a realistic option for both race teams and road users (even in very limited, exclusive numbers) then it'll need to show that the tips wear issue has been addressed.
I actually have an A0 blue-print for the never released F2 at home somewhere.
My brother's ridden a few F1s and said the biggest issue/worry with them is over-revving. They're so smooth it's easy to not realise how high you're revving them!
LukeBrown66 said:
Frame looks just like the old Spondon job they used in the early 90's! Bless him, he just cant let it lie
And why would he? I remember seeing the JPS bikes at Snetterton back in the day; they were so much faster than everything else I would persist too!Scorched yellow said:
It will do; Brian Crichton designed both bikes!Gassing Station | Biker Banter | Top of Page | What's New | My Stuff