RealClassic SQ4

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simon.holyfield
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RealClassic SQ4

Postby simon.holyfield » Tue Jan 12, 2021 10:32 am

I'm currently reading an article in RC on a SQ4 into PRF frame conversion and whilst I wouldn't dream of such a crazy idea myself (or would I? Should I?) it made me think.

Question is, the frame top tube is usually (I believe) extended for this conversion, which also makes it higher relative to the bottom tubes. If you do this, surely you have to extend the forks, or reduce the ground clearance? Doesn't the steering rake and trail change as well?
cheers

Simes

'51 Square Four,
'58 Huntmaster,
'42 W/NG,
'30 Model A
http://ariel-square-four.blogspot.com

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Re: RealClassic SQ4

Postby roland robinson » Tue Jan 12, 2021 10:56 pm

Simon,

The frame extension needed is one to one and a quarter inches, can not remember the exact figure at the moment. So yes there is a small vertical increase in height but at that shallow angle,and in the greater scheme, it is negligible and can be ignored. Certainly undetectable on my swinging arm Square Four.

Roland.

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Re: RealClassic SQ4

Postby roland robinson » Tue Jan 12, 2021 11:00 pm

Simon.

Forgot to mention that the increase in height is taken care of in the modification to the front down tubes to match up with the Square Four front engine plates.

Roland.

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simon.holyfield
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Re: RealClassic SQ4

Postby simon.holyfield » Wed Jan 13, 2021 7:15 am

One and a quarter inches! I see, it looks a lot more in the RC article, perhaps that is why he has used an A10 tank as well - I have not heard of anyone using a non-Ariel tank before.

Did you do the conversion yourself Roland? Was there any difficulty in registering it for the road?
cheers

Simes

'51 Square Four,
'58 Huntmaster,
'42 W/NG,
'30 Model A
http://ariel-square-four.blogspot.com

roger.fellows
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Re: RealClassic SQ4

Postby roger.fellows » Wed Jan 13, 2021 1:56 pm

Try asking Ben Mitchell??

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simon.holyfield
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Re: RealClassic SQ4

Postby simon.holyfield » Wed Jan 13, 2021 3:11 pm

I don't think I know Ben... Where would I find him?
cheers

Simes

'51 Square Four,
'58 Huntmaster,
'42 W/NG,
'30 Model A
http://ariel-square-four.blogspot.com

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Re: RealClassic SQ4

Postby roger.fellows » Wed Jan 13, 2021 5:23 pm

PM Simon

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Re: RealClassic SQ4

Postby paul_turner » Wed Jan 13, 2021 10:33 pm

Hi Simon
Does that mean you fancy doing one? I have the last frame Graham Horne did. Been collecting parts for quite a while and I'm pretty well there apart from seat and exhaust . All good tinware , rebuilt GB7 and mk2 engine. Rolands is a GH frame and so was the first one or possibly 2 that Ben built. I already have a swinging arm square I built as cyclone and have had two others previously so along with a few other squares have decided sell so if its some thing you may be interested in shoot me a pm.

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simon.holyfield
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Re: RealClassic SQ4

Postby simon.holyfield » Wed Jan 13, 2021 11:42 pm

paul_turner wrote:Hi Simon
Does that mean you fancy doing one? I have the last frame Graham Horne did. Been collecting parts for quite a while and I'm pretty well there apart from seat and exhaust . All good tinware , rebuilt GB7 and mk2 engine. Rolands is a GH frame and so was the first one or possibly 2 that Ben built. I already have a swinging arm square I built as cyclone and have had two others previously so along with a few other squares have decided sell so if its some thing you may be interested in shoot me a pm.


Hmm... Thinking about it, but honestly it won't be for several years. The QR50 is almost finished, but the FH is on the bench with the Model A behind it (four Ariels and a tiny Honda in one garage) - there's no space until I sell something!
cheers

Simes

'51 Square Four,
'58 Huntmaster,
'42 W/NG,
'30 Model A
http://ariel-square-four.blogspot.com

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Re: RealClassic SQ4

Postby paul.jameson » Thu Jan 14, 2021 9:01 pm

These swinging arm Squares are OK but a Healey 1000/4 is better, IMHO.
Paul Jameson
36 4G, 37 VH, 54 KH(A), 75 Healey 1000/4, 52/53 ex ISDT KHA (project).
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.


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