Regulating the AT44 - Long (.177 cal.)
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Regulating the AT44 - Long (.177 cal.)
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Topic: Regulating the AT44 - Long (.177 cal.) (Read 1023 times))
SpiralGroove
Ruminating Perfectionist !!!
GTA Senior Contributor
Posts: 7195
>The gun's gotta look good and shoot straight ->
Real Name: Kirk
Regulating the AT44 - Long (.177 cal.)
«
on:
November 15, 2014, 04:42:41 PM »
Hey AT44-L owners,
Did the rsterne tune to my .177 AT44-L
and
added a Sail
.
She shoots 975 fps with 10.34 JSB's at 120 bar and 925 fps at 100 bar (4 turns out). Left single hole in valve after plugging the other 5. Final valve hole 9/64" or about .1406" (79% of bore size). OEM valve seat already larger than 9/64", breach port too, transfer port machined to 9/64". Will try a set-point for the regulator of 1500 psi, using a 20 cc plenum; estimating that I will have 185cc of air from 230cc (regulator/plenum = 50cc) . Hoping to get 70 shots at 925 fps with an efficiency of 1.26%.
Got the regulator from Milo74 and awaiting for another plenum.
Hoping to add the regulator next week
http://i113.photobucket.com/albums/n227/kirk_schwarz/HatsanAT44-10WL1_zps6370a814.jpg
Kirk
«
Last Edit: November 15, 2014, 09:10:42 PM by SpiralGroove
»
Logged
Bothell, WA
PCP's:
AR2079A-HPA (.177)
AR2079A-HPA (.22)
BSA R10 (.177) Huma Regulated
RAW HM1000x LRT Camo - (.20) + .177, .22 Barrels
RAW HM1000x LRT RED - (.25)
RAW HM1000x LRT Blue - (.22) + .25 Barrel
QB78 (.177) OEM
Pumper's:
1973 Benjamin Franklin 342
1984 Benjamin Franklin 347
Springer's:
Beeman R9 (.20) - Circa 2019
Beeman R10 (.20) - Circa 1988
HW30S (.177)
HW35E (2) - Blued (.177)
HW35E - Silver (.177)
HW50S - Blued (.177)
HW50S - Silver (.177)
HW80S (.20)
HW80SLK (.177) (.20)
HW95 Hybrid (HW98 stock) (.177)
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Regulating the AT44 - Long (.177 cal.)