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Old 01-28-2011 | 12:38 AM
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David Gladwin's Avatar
David Gladwin
 
Joined: Feb 2002
Posts: 3,961
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From: CookhamBerkshire, UNITED KINGDOM
Default RE: PST REVISION BUILD

OK, mine is almost ready for flight test. A few notes:

To obtain the balance point, just forward of the aft limit, 1005 grams of lead was needed. The PST 1300 is slightly heavier than a JetCat with obvious slight reduction in nose weight when using the JC. Batteries in the nose are 1 x 3700 lipo and 2 x 2400 lipos.

Engine runs were perfect even though this PST 1300 has not been run for about three years. Starts and runs just like my newer 1300 which has had lots of trouble free flying in my Reaction. The PST bubble trap is quite excellent (its a strong tank and has large bore fittings) and one is going into my SG Hawk.

The fuselage adjacent to the pipe is very cool, almost zero temp rise in the little chamber I made above the rear of the pipe to house the stab and rudder plugs EXCEPT:

The fuselage adjacent to the engine nozzle got very warm indeed during static running (it should be no problem during flight with a flow of air through here) and I am going to put a layer of ceramic cloth in this area, about three inches long, just to be comfortable.

Checks of the air system revealed that the air bled down from 50 psi to nil in about 1 hour gear UP. This was traced to the wing coupling which was cleaned and lubed with BVM O ring grease. The air system now holds air pressure indefinitely, gear UP or DOWN.

Operation of the gear used very little air, pressure dropped less than 10 psi, and it would retract with just over 20 psi, extend with even less than that.

PST has made an outstanding job of the Revision, the quality is equal to the very best and vastly better than most.

Flying report will follow in due course.

Regards,

David.