TABLE C. 
Experiments with 80-ton R.M.L: Gun , Jfiaspl: No. 405, Calibre 14*5 ins. 
Woek Realised. November and December, 1875. 
350 
THE 80-TON GUN, 
13 14 15 16 
Energy. 
Per inch of shot’s 
circumference. 
At 
1000 yds. 
dMffiO'a®OOlOT?HNWH COC5UOrHOOOt'.C5TjC 
ONCO©l>©®OOa5«MO(X)C3 SCOQNCOOC5COQO 
-HCOCOCOCOCOCOCOCOCOCOCOCO COCOCOCOCOhJICOCOC© 
=£1 
At the 
muzzle. 
flHQOUSOTOCilOOCO^lOH H N© O O « ffi !D rj 
Ol>QOHCO©lO^COOH^IlO COCMlOCOTfCCO-^rHrJt 
Total. 
' At 
1000 yds. 
o 3'#COHN'^03C30NUO»1> 05 -rjl CM r- 1 t- r-1^1005 
C|OO^OCU5t>r?TflCOt^QO'^l05 O H 1> H 05 © 05 C5 
O CO CO O^H H WOl 05 NW5 l> 0^00^05 05^ CO^ 10^05^ 
H' ud cb'td ododidib' ia cd m id tdcdtdcd'.tdodtdcdjd' 
p-li—IHi—t i—1 i—IrI t— l,rH 
At the 
muzzle. 
to CO 00 CO CO 00 rl O 00 © O NlOOlOOOOOUJO^ 
d^0^ccji>ioiocit^:oioco coioooooioiooio^ 
o QN 05 M 05^05 Cl irj^GO (Mio CO 0^0^00^05^0^ 
<©T td ad of d'o'dd od oo o' o'' oT of o' cT o" i-T o' Ob' cT 
m *109£9 jo .rapej 
cpi^cicocociooipooip joocOthco 
djooso^fiOPOOcbTLio^^i oo5cbaoidcbcbi>.ib 
05 00 00 05 05 05 05 00 00 00 05 05 05 00 05 00 00 05 05 00 00 
8 9 10 11 
Energy. 
•jeqraeqo 
-.xapAvod 
no 9.TUS 
-se.id weaut 
JO UOJ J9J 
g _2 _ 5 _j_|__j_j_05 oo O cm 05 co ipcpipcsrHyooco 
o 1 || | | | (aHaiNHm t^o^cbbiosocbcb 
■^1 1 1 1 1 | t> H 00 CO T* to lONCOmt-^ONH 
• 00 05 05 05 05 00 00 00 00 00 00 oo 00 
cS 
M9pM.od JO 
punod .xaj 
to .j -4 
flb-NNt-COMOOWOOip M^M 0 ©N «)09 
365w6o5HNih66a)(ii« osdooibcbibcqcbrH 
. 05 05 05 00 05 00 05 00 00 M 05 05 00 00 05 00 00 05 05 00 00 
cE 
Total. 
Realised. 
TOCOOOeOCOOOrHOOOCOOO'!? MOOlOOOOOlOO^ 
fl'JOrfiJU>lOU505 N©l(3© «UOOOOO>Ol(50iOrf 
C O^t- 05 J> 05^05 (MlO^OO <M^ CO hJI MO O O CO 05 N 
^oqd'adodooo'idodado©' od od o' od o' Hb" od cT 
^HHHH(MNiyiHHr-l(M!M i—1 H (M H (M OI (N H (M 
cm 
Theo¬ 
retic. 
ra^OOOSCTCOOOIOlQOCMnin <M CM 00 00 O CM CM CM CO 
OCMCMMCOCO-^HCOCOCO.^COCO COCOcCCOnJCCOCOCOlO 
O rH rH M NbHHO^NN® 
H Ob' od rd rH cd n rd rd c<f CO rd rd rd rd cd cd CO rd rd rd CO 
-4JrHrHCqCq<MCa<M(MCM<M<M<M <M<M(M<M<M<M<MCq(M 
Cm 
(•seSrveS 
8 pun *g ‘i ‘y) 
L *j;eqram{0-.i9pAvod 
no e.inssejd we9]y 
TO Cq CO i> lO lO -H 05 Cq 05 "31 O rH rH -ft 00 
S I 1 CO 05 bb 05 rH H CM CM -31 CO CO OO lb ^ H 
42 1 1 1 1 1 CM rH rH H Cq CM CMCMCMCMCMcMCMCMCM 
6 
Maximum 
pressure. 
4_4— 5 —j—j—j— ^ 
. H H H <1 <! <1 <1 rH rH rH <1 H H <! <! <1 H H H <1 <5 
aaaaaaaaa 
^OqqcOrHrH05lOCOcpO5ipq0 rHG0q0-^Cq5O05CpC0 
cbrHcbrHooibcboooibcb ib-^ccbib'^POcbMcb 
CMCMCMCMCMSqOqtMCqCMCMCM CMCMCMCMCMCOCMCMCM 
5 
Velocity. 
•sp^OOOIJV 
00 l© O 00 CO Cq 00 H CO CO 00 00 COOOIC5CM05COOCOCO 
4i05(MN05^r}IH(M10©H(M 05 00 CO 05 O W M 00 H 
Cm CM CO CO CO tJI tJC CO CO CO "J -tfl CO CO ^ CO rP CO CO CM -*JI 
HHHHHHHHHHHH HHHHrlHHHH 
•9[zzn]y 
i ^IflrJIrjHOlOOlOOlOlO CMCOCOCOCOOnflCOCO 
05 OI M C IC3 lO CM CM 1C i-» CM CO OC5Hf<C5rHrj!rHCO(M 
HHHHHHHHHHHH HHHHHHHHH 
'sH •ejijoefo.qj 
•050505050505050505050505 C5C50505051Q10 10G5 
” lO lO lO ICO lO ICO lO lO ICO to lO lO lO lO lO ID U3 © © © 1(5 
-2<MCq<M<M<MCM<M<M<M<MCqCM CMCMCMCMCM'^^hJICM 
HHHHHHHHHHHi— 1 rH i— IrHrHrHr—IrHrHrH 
CO •eS.mqQ 
. oooooooooooo ooooooooo 
“l>O5HCMC0^(MCimrf(M(M (MCMCOCOrflCMCMCMlO 
S3rHrHCq<M<M<M<M<M<MCq<M(M CMCMCMCMCMCMCMCMCM 
2 
Powder. 
1 # no 
*. g 4 S 
io . .g-g 
*> ^ <53 9 
• • 3 ^ 
rH cq 
cq 5 5 5 ' 5 5 ^ 5 5 IC 5 M CM M CM cq >o id Cl CM 
.a « rc > 
3 ^ ^05 , 5 a , , a a a * 
rH -pnno.i jo ‘ojq 
HOqCO^lO01>GOa)OH(M CO^lOCONGOOiOH 
i — 1 rH rH HHHHHHHCKM 
* Re-worked from L.G. + Fired by R.Gr.F. Pressure only recorded on a crusher in cup at end of bore, and in base of projectile 
before the gun was bored for crusher gauges. J Cartridge rammed home very hard this round. 
