Category Archives: Moss Scott 1934 Flying Squirrel Racer

July 2015 : an update

I’ve not written much recently but there’s plenty been going on.

My racer is still on the stand, although I now have a new front aluminium mudguard to replace the one damaged in the lowside crash at Anglesey earlier in the year. I also set about the paintwork on the headstock to try and find trace of a frame number, which would help me to register it for the road if I so desired. I found it in the end (but not before I’d removed a decent amount of perfectly decent paint) and amusingly it confirmed that the frame was never a Super Squirrel frame, but a 1932 Flying Squirrel. I have actually called it a Flying Squirrel in the past (and a Sprint Special when I was very young and simply wanted it to be one…) but the idea that it was a Super Squirrel stuck for some reason and I can’t even remember why. It’s not even that the engine type was the same.
So from this moment on I shall call my noble steed by its rightful title: My Flying Squirrel racer.

Although Anglesey was a while ago now, one of the other things that happened at the time was that my dad’s bike was due to be tested the following Tuesday for Classic racer magazine by Steve Plater, a former motorcycle racer and TT winner. I made the journey to Cadwell the day after getting back from Anglesey and we were very interested to see how he got on and what he made of the bike. He’s used to modern machines and I don’t think he’d ever ridden anything like it before. My dad advised caution through Charlies because of it’s tendency to get out of shape on the exit, but apart from that let him work it out himself.
We changed the bars to give him a different position and he seemed to be gaining confidence quite quickly through hall bends, where we were watching. He was certainly moving. However, maybe the confidence was a little premature as he lost it out of Charlies as a result of a tank-slapper that he couldn’t control.
Noticing that he hadn’t come round for another lap, I feared the worst and ran up to the van just in time to intercept the recovery vehicle. I took a deep breath when they opened the back door as the steel Vincent straight handlebars were bent vertically both sides, like bulls horns. I could see the top fork links had bent significantly before I even got it on the stand, and by the time Steve told me that it had gone over a couple of times I already had a mental picture of what, in all honesty, was the worst racing incident it had ever endured in over thirty years.
Of course, we were all relieved that Steve was ok. It could have been very nasty for him. On reflection, I think we were naive to think that even a highly successful professional modern rider might just sit on something with as lowly relative performance as my dad’s Scott and be able to work it out easily. Riding a rigid bike, or more to the point, racing a rigid bike requires a whole skill-set of its own. The feedback to the rider from a rigid chassis with girder (almost rigid) forks has little comparable in the modern motorcycling world. Racing with modern tyre compounds winds up the chassis and causes some instability that you get used to and some you know you can’t. Even though you ride a different line to avoid the ripples or the sudden dip in track surface etc, arse off the saddle.. damping with your knees like a jockey… there are some corners where you don’t want to try to push the line, and the exit of Charlies always has been one.
At the end of last year, Bill Swallow had a ride on my Dad’s bike in one of my races and he got into a tank-slapper coming out of Charlies which certainly caused him to wind it back it little. He knew he couldn’t push any further.
Maybe Steve felt a little under pressure to perform? Possibly, although he is obviously a great rider with a lot of experience of real racing pressure so it’s difficult to believe. I think the truth is, that he just didn’t know what the bike would do and assumed that he’d be able to tame it. It was a sad end to a day which promised some exposure for the British Historic Racing Club, plus a wonderful chance to see what a well respected modern champion might achieve with the bike in the way Paul Dobbs did with such style, ten years ago. Rest in peace, Paul.
In the end, it was a mistake, just unfortunately one which will take a while to sort out. Now stripped, his racer needs to have to frame checked for straightness, the bearings, the wheels etc. The fork blades are bent and most likely other parts of the assembly too.
Of course it will be done, but at 74 Roger has a lot of engine work for customers and it’s just difficult to find the time for minor developments, let alone complete re-alignment and rebuilding work. It won’t be done until next year, for certain. We have to remind ourselves that beyond the feelings of sadness and regret over the incident there must remain one clear point:
This is what racing is.

Stafford Classic Mechanics show (Oct 2014)

The Stafford classic bike shows are apparently very popular and certainly this one was a good day out. Definitely oriented towards post vintage stuff and mostly 1960’s onwards really. I don’t go to shows that often, in fact the last time i went to Stafford was on my dad’s Ducati 750SS when I was 18 (he must have been mad). That’s 24 years ago. The best bit really was the opportunity to chat to the guys on the BHR (British Historic Racing) stand where Roger’s Scott was being displayed along with a number of other really interesting machines.
The Mogvin, a mightily impressive Vincent twin powered three wheeler with two wheels at the front and one at the rear drew a lot of interest and Robbie Browns highly developed 175cc championship winning BSA Bantam sounded fantastic when he started it up for a crowd.

The Mogvin
The Mogvin

Robbie Browns BSA Bantam in 175cc guise.
Robbie Browns BSA Bantam in 175cc guise.
Mark and Sue Whittaker, hugely enthusiastic supporters of the club and campaigners of a BSA outfit were displaying their temporarily worse for wear Enfield Bullet, which they lend out to people who want to try their hand at racing with the club.
Roger's Scott Flying Squirrel racer with Mark and Sue Whittaker's 'Bullet for borrowing'
Roger’s Scott Flying Squirrel racer with Mark and Sue Whittaker’s ‘Bullet for borrowing’

Tony Wooley’s purposeful Rocket 3, and a number of other club machines completed a very impressive display with Gerry Daine, John Lorriman, the Whittakers, my dad, Robbie Brown and others manning the stand for the weekend.
I started racing with the club back in 1988, but it’s neither been continuous through the intervening years nor am I as regular a competitor as I’d like. The best bit of the show for me was really the opportunity to talk with the guys on the stand. So much racing experience, so much tuning knowledge and such decent people. The BHR has still much of the family feeling to it that it always had. Sure, things change and the early classes aren’t as well supported anymore but I guess that’s what is bound to happen. Things change. Paddocks are still open and friendly to all who come to a meeting and anyone who fancies a go will find a welcoming reception.
There was one other notable thing which made my day.
They have a little ‘GP area’ which they bring notable bikes into so that the owner can talk about his machine and then they can start it up for all to listen to. Roger had been asked to show his Scott on the Saturday and the guy doing the interviewing, Steve Plater ( ex TT and NW200 winner) had given him the microphone. My dad occasionally likes playing to the crowd and put on a great show. I saw him present his bike on Sunday and I was very pleased to find that someone had videoed the occasion.

See the interview here.

Roger’s Flying Squirrel racer – some pictures

Whilst I work out the port timing calcs, here’s a very early picture of Roger’s Flying Squirrel racer frame to illustrate his description in the comments to the post ‘The evolution of the Super Squirrel racer’

Top triangle was a design to remove the role of the standard frame's lower rails to retain rigidity.
Top triangle was a design to remove the role of the standard frame’s lower rails to retain rigidity.

The crankcase in this shot is, I believe the last standard Scott case that he ever used but fitted with the four bearing crank he made to help stem the tide of standard longstroke overhung crank induced engine carnage. Note the odd shape of the doors with the bolts in the middle. These are just blanking bolts; once removed a slide hammer can be attached to the doors to extract them as they obviously have to be a good fit to support the crank assembly.
The strength of the crank assembly was proven in quite extreme circumstances when there he started it at a meeting and it fired on one before hydraulic locking on the other cylinder, in which there had been a water leak. The contest of strengths was lost by the crankcase, which split across the main bearings. So much for sorting the crank problem.
Another interesting thing to note is the blind head block, which I believe was aluminium. This didn’t have any kind of higher compression inducing form work in the top to match the pistons, as his detachable heads do, but it would have been lighter than standard and running Silk pistons as we still do now.
just found some photos of the whole assembly:
Aluminium block and EN24T four bearing crank assembly. That's a titanium rod as well, in about 1977!
Aluminium block and EN24T four bearing crank assembly. That’s a titanium rod as well, in about 1977!

Also here’s a picture of him working machining a crankcase for Ted Parkin’s Scott. I believe this has extra large doors to take a set of special extra long stroke cranks.

Thicker sections, bigger port tracts, better material and designed to take replaceable main bearings with modern oil seals.
Thicker sections, bigger port tracts, better material and designed to take replaceable main bearings with modern oil seals.

and here is Ted’s racer with new engine in place.

OLYMPUS DIGITAL CAMERA
OLYMPUS DIGITAL CAMERA

The evolution of the Super Squirrel racer

I’m doing things backwards here. I realise that I need to give some more of the the original history of the Super squirrel and how Roger’s Flying Squirrel racer came about. As I said in the previous post, the Super Squirrel racer is really only just returning to having the potential of competitiveness that it did in the early 1970s.

Super Squirrel racer, prior to frame modifications (around 1971/2). Note Roger's Laverda SF750 production racer with race kit. An unusual racing stable.
Super Squirrel racer, prior to frame modifications (around 1971/2). Note Roger’s Laverda SF750 production racer with race kit. An unusual racing stable.
Roger on the Scott Super Squirrel racer (around 1971/2) racing at the New Brighton circuit on the Wirral.
Roger on the Scott Super Squirrel racer (around 1971/2) racing at the New Brighton circuit on the Wirral.
My dad, Roger, having found that the Scott was fast and competitive in racing was very much committed to finding the solutions to the bike’s shortcomings, namely in handling, gearbox and engine reliability.

The single down-tube frame of the Super Squirrel had broken once before at the seat post and had been re-inforced substantially. Tie bars had been created to give some tension to the lower engine and undertray (carries the gearbox on a Scott) mounts as the original lower frame ‘rails’ have to be removed to be able to race. Left in, they will dig into the track and have you off.

Later shot of Super Squirrel racer around 1973/4. Note lower rails removed , replaced by tensioned 'tie bars'
Later shot of Super Squirrel racer around 1973/4. Note lower rails removed , replaced by tensioned ‘tie bars’ and no silencing!
This did leave things a bit more flexible in this frame and he resolved that therein lay some of the problem. He was sure a stiffer frame would be a great improvement.
He addressed the handling issue by having a duplex frame made by Bob Stevenson of Spondon to a similar design and geometry to the Flying Squirrel, only using lighter tubing. To be honest, he’s always said that the duplex frame he had made didn’t actually improve the handling, but it did allow a bigger carb (because you didn’t have the single down-tube in the way) and it was quite a bit lighter as it was a welded construction and not lugged.
Years later it was Paul Dobbs, the talented Kiwi rider who suggested that he thought the handling could be improved by moving the riders weight forward.
Paul Dobbs in inimitable action over the mountain on the Scott at Cadwell park, 2005
Paul Dobbs in inimitable action over the mountain on the Scott at Cadwell park, 2005
My dad did this, moving the seat forward, and a big improvement was felt. In about 2010 he had the tank shortened to allow this to be more neatly contrived.
I also moved the saddle forward on the Super Squirrel when I re-built it, and swapped the ‘Brooklands’ style bars that my father favours with a set of wide straights that force your hands wider and make your body weight shift forward. The handling is far better for this, and actually I much prefer the extra leverage too.

The gearbox story is well explained in his story of the affair, here, and the pursuit of power and reliability were definitely linked, as the inevitable longstroke crank breakages inevitably took it’s toll on successive crankcases, prompting a decision to re-cast cases with better material and extra strength. Cases were redesigned to have larger transfer apertures and inlet port areas and cranks were re-designed to use the crankcase doors as an outer main bearing support to overcome the design flaw and material shortcomings of the original overhung crank.

The development of the Super Squirrel racer into the Flying Squirrel was not instantaneous though and it was largely about a substantial focus on re-engineering. In truth, that has consistently been the focus of his very successful Scott racing development work. In the process, he has developed his Scott to the point where some people even dispute that it is one. To me however, the Scott was Alfred Scott’s creation and he was a man of vision and ingenuity. He left the company that bore his name in 1915 and died in 1923. It’s impossible to look at the balance and finesse of those early shortstroke machines and imagine that he would allowed the bikes to have developed as they did, in both weight and fragility, had he stayed with the company.
To me the very spirit of the Scott is strongest in those machines where people have employed their skill and imagination to take the unique qualities of the Scott and develop them.
It is in the DNA of the marque and though I understand of course that there are those who have great enjoyment of their original machines, to me there is no Scott more a Scott than one that has been intelligently modified, and there is no Scott that can lay claim to having been been developed with more ingenuity, determination, focus and success according to its remit, than Roger Moss’s Flying Squirrel racer.

Waiting for the call...
Waiting for the call…

Some classic footage from Snetterton back in 1986

Some classic footage from Snetterton back in 1986

Text by Roger

I have met and continue to meet great people through Scotts and the drama adds zest to my life. Recently, a man named Barry Lain phoned me for some info about Scotts. He had long wanted a Scott and had seen one racing in 1986 at Snetterton which had much impressed him. He had recently found and bought both a Scott and a vintage Douglas. In 1986, he had bought a video camera and filmed a good selection of paddock and racing at a Snetterton Vintage racing event. He asked if I had ever raced at Snetterton and I told him I had, but not very often. He told me that he had filmed the Scott in the paddock with an old man sitting on it- I asked if the bike had droopy bars and carried the number 115. He answered in the affirmative. I then knew that particular event.

My dad had had a heart attack and was getting over it, but was a bit shaken and frail. I wondered if I could do something to lift his mood and decided to invite him to the next race meeting at Snetterton On the way over, he asked me if I thought I would win. To my dad, you either won, or it was a waste of time. We are quite a bit different in our outlooks! I told him that Snetterton was a track that suited bikes with a good top speed and that the Scott was not as fast as a cammy Norton for example, but I thought I would be well up. In truth, I knew the track pretty well as I had raced my Laverda and 750 Ducati production bikes there many times from 1970 onwards with the BFRC club of which I was President. My dad went to watch the race by the fence and next to him was another man who told him, “I have come specially to see the Scott, It was here last year and he will win. My dad told him that it was his son’s bike and I had told him I did not expect to win.

The first circuit saw me with a big lead and went on to win comfortably. The man told my dad that he should have more faith in his son! The video shows a great selection of bikes and is quite well filmed for an amateur, as video filming is never as easy as expected. The sound is quite good which suits the Scott as it was before it was banned for excessive noise at Oulton and obliged to wear a silenced system…