Tinworm-wings: The Obalob Method of navigation

Monday 28 December 2009

The Obalob Method of navigation

I was looking for a cylinder which would wrap around my leg to provide a "slippery" map-board which could allow me to rotate a map around my leg (see this earlier experiment). Then Lizzie, a keen gardener, suggested using a plastic flowerpot! Genius!

As an aside, watch Bill and Ben, the Flowerpot Men (BBC, 1953),
as only anyone of my generation will remember where obalob comes from.
(whiz past first three minutes)

I cut the base off one and slit it top to bottom. Then I colour copied 2xA4 views from my 1/4mil chart of England South, stuck them together and laminated them (interleafing two A4 pouches carefully to make a longer one), mounted the chart around the pot with duck tape and then tightened the pot around my suited leg, securing it with a final bit of tape (in the final version I think velcro might be more suitable).

Ordinarily, I could expect to get a map of the route from Sutton Meadows to Sackville on one leg, but my new method allows a flight North-South from say Sutton to Peterborough or East-West from Sutton to Leicester. That isn't a massive distance (45 x 25 Nautical Miles), granted, but one leg-map would cover all my favourite airfields, including Sackville, Sywell, Leicester, Bakersfield, Deenethorpe, Grafton Underwood, Kimbolton, Chatteris, etc. And for a novice like myself, that is more than enough to be getting on with while I hangar at Sutton for the next few months. (see 2nd Update below!)

I will risk the ridicule. It is a "potty" solution but an efficient one, which will allow me good access to undercarriage controls and a clear view of the countryside below me and instruments in front.

Update
I have now fitted it out with velcro, so that it is fully functional; no longer just a prototype. I made a point of putting the fluffy side closest to my leg (wrapping a length of it along the inner and outer of the rough edge), so that the inner surface will slide easily against my suit. I will secure it on top of my leg then just slide it round. Simple.

I am really pleased with it.

2nd Update
While fixing the pot to my leg just now, I realised that I still have room for another 35 or 40 nautical miles under my leg (near the fixing velcro)! This could be a different route . . . leg, if you like, ahem. . . or the space could be used for landing / circuit info for the destination!

Sweet as a nut!

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Ground handling (how to store an aeroplane at home and get it to the airfield)

A trial flight in a Thruster, when I was 28, c.1991

I have started to learn to fly before...TWICE! First time round I had just graduated and got a job at an aerodrome in Cornwall, where I earned flying hours by fuelling microlights, giving hourly weather reports to the Met office etc. The weather was bad, so there was little flying to be had...and in the end I was paid with broken propellers and bits of crashed fuselage to hang on the wall. The boss was a great bloke called Ian Stokes, who had been a leading light in forming the BMAA and had manufactured Thrusters in the early days . In retirement he moved to The Gambia and became a publican and, shockingly, was murdered this year.

Flying Rogues

ten years on from my first experiences at Moorland Flying School (and now nearly ten years ago) the flying school was under new management and my girlfriend and I booked full courses. We both made good progress initially but never felt we were being moved on and had difficulty pinning the instructor down to signing our logbooks. When another instructor signed himself as P1, we got suspicious, contacted the CAA and were horrified to learn that our instructor did not have a current instructor rating, that we had not been insured and that none of our hours counted towards our licences. We were eventually refunded and the instructors were prosecuted by the CAA.

The very sympathetic CAA investigator spoke to the BMAA on our behalf and my hours have been allowed to count (at the discretion of the school). But in point of fact, I flew way over the minimum number of hours subsequently, so it is really quite academic in the end.

Around 2001 an instructor in Norfolk tried to convince me that if I bought his aeroplane he could teach me at a cut rate, as I'd then be using my own plane. Great idea, I thought, except that it turned out that the aircraft in question had failed a noise test and could not be used from the instructor's field. He later admitted that I would have to learn on his aeroplane at the normal rate. He resisted showing me the paperwork, kept avoiding me and eventually, when it was quite clear I wasn't going to buy without the paperwork, told me to F-off.

So far my experience has been that there are a lot of rogues in flying, which is one reason why I was so very impressed by the professional set-up at Sywell.

by air to Africa

My sister and I were lucky to fly many thousands of miles in the 1960s and '70s in many aircraft types, including BOAC VC-10s, Boeing 707s and even a Nigerian Airways Dakota, as our dad (and later our mum) had teaching posts in Kenya and Nigeria. Those were still the romantic days of flying, when passengers walked across tarmac and up steps, rather than walking down the tubes that have turned passenger flying into a mundane affair. (Mind you, aren't take-offs still incredibly exciting!?)

Back then air hostesses GAVE children the sorts of nick-nacks that their parents have to pay fortunes for from the airline catalogue these days; things like model aeroplanes, keyrings etc. We were also given sweets to help us cope with depressurisation. (And they were hostesses, so nobody give me a hard time)

Mum says that I cracked my first joke when I was small, on a flight out to Kenya, when I said, "Mummy, shouldn't there be a wing on this side of the plane too". Apparently I got her with that one.

At Kano airport I remember standing behind an engine and thinking how hot it still was....and then being told that the engine was cold. The heat was Kano. I got a headache and took several days to aclimatise.

The airport perri-ways at Kano were littered with aircraft that didn't make it, including a burnt-out Mig 15. The Nigerian Airforce flew them and my dad played squash with one of their pilots, Ben, at the Kano Club. I recall a Mig fly-past on my birthday. Was it arranged with Ben over a beer? Was it a pure coincidence?

At Entebbe airport (Uganda) I remember climbing down the steps on to the runway and being encircled by soldiers with machine guns, who then went through all our belongings and confiscated my cherished Swiss Army penknife, purchased on one of numerous European stop-overs. That was in the twitchy time after the Israeli hijacking ...and mum had to stifle my protests.

Before my first flight to Nairobi, as an infant, I was scared stiff. I didn't understand that I wouldn't have to sit astride the fuselage, as I did on my pedalcar! In a funny way, I not only overcame that fear but have come full circle; microlighting is just like sitting on that pedalcar......open to the elements - real flying!