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by PeterW
Wed Jul 24, 2019 8:39 pm
Forum: Member's Bikes
Topic: A matter of weight...
Replies: 20
Views: 7964

Re: A matter of weight...

Spooky, at lunchtime I was reading a 1945 edition of The Motor Cycle and the letters page had one from some chap called Hartley listing all the benefits of heavier flywheels.
by PeterW
Fri Jul 12, 2019 1:24 am
Forum: Ariel Talk
Topic: Heads: 1928 Ariel vs. 1963 Gold Star
Replies: 17
Views: 1911

Re: Heads: 1928 Ariel vs. 1963 Gold Star

Interesting :¬) I guess the other things to consider are the pressure in the pipe, the speed of the gasses and the length before it hits a point where the pressure can drop. In the article they talk about megaphones allowing a 42inch pipe even though the racing rules said it had to reach to the rear...
by PeterW
Thu Jul 11, 2019 11:04 pm
Forum: Ariel Talk
Topic: Heads: 1928 Ariel vs. 1963 Gold Star
Replies: 17
Views: 1911

Re: Heads: 1928 Ariel vs. 1963 Gold Star

Yep, and added to that is the back-pressure caused by the length of the exhaust being important in keeping the correct flow of the gas through the head so a too free flowing exhaust can just lead to more mixture disappearing. And talking about inlets, my car has adaptive inlet tracts so you get a di...
by PeterW
Wed Jul 10, 2019 9:28 pm
Forum: Ariel Talk
Topic: Heads: 1928 Ariel vs. 1963 Gold Star
Replies: 17
Views: 1911

Re: Heads: 1928 Ariel vs. 1963 Gold Star

Found it!
From Feb 1945, tiny writing as paper supply was restricted so you'll need to zoom.

Image (1).jpg


Image (2).jpg


Image (3).jpg


And while I had the scanner out - anyone fancy painting their WNG white?

Image (4).jpg
by PeterW
Wed Jul 10, 2019 7:52 pm
Forum: Ariel Talk
Topic: Heads: 1928 Ariel vs. 1963 Gold Star
Replies: 17
Views: 1911

Re: Heads: 1928 Ariel vs. 1963 Gold Star

Recently read an article in The Motorcycle on this. Will try and find it...
by PeterW
Thu Jun 13, 2019 9:22 pm
Forum: Main Chat Forum
Topic: Stephen Dolling Collection ?
Replies: 4
Views: 635

Re: Stephen Dolling Collection ?

Doesn't look like he was a GB entrant.
https://speedtracktales.com/2013/12/08/ ... isdt-1939/

Seems the photos came from Sunbeam
https://speedtracktales.com/index-of-is ... 932-italy/
by PeterW
Fri Jun 07, 2019 7:45 pm
Forum: Main Chat Forum
Topic: Tiepins
Replies: 1
Views: 432

Re: Tiepins

Nice!
by PeterW
Thu May 23, 2019 6:54 pm
Forum: Four stroke
Topic: 1939 RH 'R' stamping
Replies: 20
Views: 1693

Re: 1939 RH 'R' stamping

I'm on holiday but pretty sure my 1950 NH350 has an H between the pushrod tubes.
by PeterW
Thu May 23, 2019 9:17 am
Forum: Main Chat Forum
Topic: Urgent assistance needed in Italy
Replies: 2
Views: 774

Re: Urgent assistance needed in Italy

Just to say that Mike made it safely back to England.
Over 300 miles per day on an ailing WD bike to raise funds on behalf of the British Legion.

https://www.justgiving.com/fundraising/MonteCassinoorBus

Good effort!
by PeterW
Wed May 15, 2019 9:50 am
Forum: Main Chat Forum
Topic: Urgent assistance needed in Italy
Replies: 2
Views: 774

Urgent assistance needed in Italy

A good friend of mine is riding his BSA WM20 down to Monte Cassino. He's nearly there but the ignition & electrics are failing rapidly. If anyone in the area can assist he'd be very grateful. Seems a shame to get so far and then fail.. https://m.facebook.com/groups/211093936115735?refid=27 Shoul...

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