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Here are links to prior posts on Chichester's navigational procedures:

http://fer3.com/arc/m2.aspx?i=108625

http://fer3.com/arc/m2.aspx?i=108623


gl


On Aug 2, 5:35�pm, "glap...@pacbell.net"  wrote:
> "It was a fourteenth the size of the smallest compulsory landfall made
> by an
> aeroplane. From New Zealand it presented a target half a degree in
> width. And my
> compass, recently swung twice on that bearing, had varied 9 degrees
> during the
> interval; further, it was nothing to drift 30 degrees in a stiff wind.
> And since
> an error in the course of only 5 degrees meant passing the island 50
> miles away,
> it was plain I could only depend on the sun to find it.
>
> "Instead of heading direct for the island, I altered course 10 degrees
> for a
> point 90 miles to the left of it. Flying towards this imaginary point,
> I must
> observe the sun carefully until it gave me the exact bearing of
> Norfolk Island
> on my right, and showed me to be on the line through point and island.
> I must
> then immediately turn to the right and head direct for the island.
>
> "I must make no mistake and turn neither a minute too soon nor a
> minute too
> late."
>
> Seaplane Solo, Francis C. Chichester, 1934.
>
> The offset had nothing to do with a possible error in the sextant
> reading which
> he needed to be accurate enough to put him on the LOP through Norfolk
> close
> enough to spot the island. The offset related to the possible error in
> the DR
> after traveling almost 600 miles.
>
> The book is great, very exiting and well written
>
> Also see the topic Single LOP landfall procedure at my website:http://www.geocities.com/fredienoonan/
>
> gl
>
> On Aug 1, 6:26�pm, Tom Sult  wrote:
>
> > Gary....
> > Sounds like a great day at the Aerodrome! �I also am a pilot, and �
> > would love a copy of the book. �If you can email it to ts...@mac.com �
> > Thanks.
> > Thomas A. Sult, MD
> > IntegraCare Clinicwww.icareclinics.com
> > ts...@charter.net
>
> > On Jul 31, 2009, at 8:59 PM, Gary LaPook wrote:
>
> > > My interest in the Bygrave was triggered by my reading Sir Francis
> > > Chichester's account of flying a Moth, open cockpit single engine
> > > airplane across the Tasman Sea in 1931 doing celnav on the way to find
> > > two tiny islands where he could refuel, each leg about 500 nautical
> > > miles. Today, at Headcorn Aerodrome in England, I had the �
> > > opportunity to
> > > fly the same type of aircraft and my admiration for Chichester �
> > > increased
> > > ten fold. It is a very light aircraft so it is bounced around a lot my
> > > even the lightest turbulence. The controls are very sensitive,
> > > especially in pitch, so it takes a lot of concentration to keep the
> > > plane flying straight and level. It is also very noisy and the wind
> > > blows vigorously through the cockpit. I don't know how Chichester
> > > managed to do it, flying the plane, shooting sun lines with �a marine
> > > sextant, doing the computations with the Bygrave (holding it
> > > horizontally so it didn't get blown out of the cockpit), estimating
> > > drift angle, and plotting the LOPs and the drift lines. I recommend �
> > > this
> > > book, Seaplane Solo, to everybody and I can email a copy to anyone who
> > > is interested.
>
> > > gl
>
>
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