New 500cc Sumatra
Just received the first 500cc Sumatra for testing.
WOW
this rifle is nice!!
The new sumatra has a walnut stock, open sights, adjustable cheek, and
a 500cc air reservoir.
Here are some pictures.
Cheek is adjustable with allen key.
Rifle feels like it weighs around 7lbs.
Bottom tube is slightly bigger thenthe top tube.
Bottom tube is made of aluminum. (I tested it with a magnet)
Good balance and counter weight.
I will post numbers soon.
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They should hit the states sometime in March.
It was May but they moved the date up.
That is looking frigging SWEET Sluggo! I’m liking that shot count and consistancy…man that sucker is making some power!!!!
Anyone ever say when these are coming out for sale?
Jim.
Here are the numbers
I filled to 3000psi Turned the wheel all the way up.
Loaded the mag with 28gr eun jin pellets
1= 1113fps
2= 1100fps
3= 1093fps
4= 1075fps
5 = 1069fps
6= 1067fps
Refilled and turned the wheel to the second red dot (one complete turn)
Loaded the mag with 28gr eun jin pellets
1= 973
2= 966
3= 965
4= 960
5= 952
6= 953
7= 940
8= 932
9= 930
10= 928
11= 928
12= 930
13= 935
14= 929
15= 915
16= 919
17= 907
18= 904
19= 932
20= 922
21= 902
22= 899
23= 900
24= 890
Turned wheel to the next dot Black
25= 964
26= 970
27= 960
28= 949
29= 952
30= 940
31= 927
32= 911
33= 904
34= 908
35= 908
36=910
37=901
38= 899
39= 892
40= 890
41= 888
42= 879
2300 psi left in rifle.
Refilled to 3000psi and loaded crosman premiers 14gr pellets
Turned power wheel to the lowest power dot and up three clicks
1= 980
2= 985
3= 993
4= 990
5= 990
6= 1010
7= 999
8= 1012
9= 1009
10=1009
11= 1001
12= 999
13= 996
14= 998
15= 999
16= 995
17= 990
18= 988
19= 997
20= 1001
21= 995
22= 991
23= 999
24= 1010
25= 1007
26= 1008
27= 1006
28= 1005
29= 971
30= 989
31= 990
32=992
33= 990
34= 1004
35= 990
36= 1007
37= 999
38= 989
39= 1001
40= 999
41= 990
42= 998
43= 996
44= 986
45=1000
46= 1005
Turned it down 2 click
47= 955
48= 954
49= 972
50= 968
51= 988
52= 980
53= 977
54= 991
55= 977
56= 978
57= 950
58= 951
59= 950
60= 943
61= 954
62= 964
63= 950
64= 952
65= 968
66= 950
67= 973
68= 964
69= 957
70= 959
72= 940
2300psi left
Only had 35yards to test accuarcy.
5 shots =dime size groups with both pellets.
You need a crony to find the right power levels.
It’s only to lay carbon on?
Way is the aluminum so thick?
Don’t you think .1968 is a little thick? That’s almost a quarter of an inch.
Aluminum is strong, but deforms easily. The first step is to vacuum bag the assembly and too thin a shell will collapse.
As far as I know, thats the only reason its so thick. It could be the manufacturer had the same problems we had, or maybe they didnt want to use as much carbon as they should be using. Carbon is very expensive.
This poses a good question for our engineers…[/quote]
You must not work for Luxfer
I have been to there facility in Riverside CA and I own an aluminum tank with a carbon fiber wrap 4350psi 106 cu ft.
They have mastered the aluminum scuba tank.
Cycle-tested in excess of 100,000 cycles at service pressure.
Minimum burst pressure tested to 2.5 times service pressure without failure.
Manufactured to all recognized international standards.
Corrosion-resistant interior and exterior—unlike corrosion-prone steel cylinders.
[quote=”sluggo
It’s only to lay carbon on?
Way is the aluminum so thick?
Don’t you think .1968 is a little thick? That’s almost a quarter of an inch.[/quote]
Aluminum is strong, but deforms easily. The first step is to vacuum bag the assembly and too thin a shell will collapse.
As far as I know, thats the only reason its so thick. It could be the manufacturer had the same problems we had, or maybe they didnt want to use as much carbon as they should be using. Carbon is very expensive.
This poses a good question for our engineers…
Hope you all have a Happy and Safe Holidays! Jim.
This weekend I might go out to shoot.
You traded your .20 cal for a .25 cal 707?
You need to pick up some 42gr pellets for that beast!!
The only reason for that is to give something to lay the carbon onto.
These bottles are built in an autoclave mold. After carbon is layed around the bottle, a high pressure bladder is layed around the carbon, and then vacuum is applied to pull the material tight against the form bottle (aluminum inner skin).
Air is then pumped simultaneously into the inside of the bottle and the autoclave up to around 200 PSI, creating equal pressure inside and outside the bottle and compressing the carbon very tightly.
200 PSI doesnt sound like much compared to the fill rating of the bottle, but this pressure sometimes shatters the bolts holding the autoclave together, resulting is a ruptured bottle.
After the carbon is cured, the pressure is released and the autoclave is taken off, bladders removed ect… Fittings added and bottle is tested.
The company I work for has made these in the past. Owner decided it was not a cost-effective product to build.
I guess I rambled, but the aluminum skin inside that carbon bottle will only hold about 150psi all by itself.
It’s only to lay carbon on?
Way is the aluminum so thick?
Don’t you think .1968 is a little thick? That’s almost a quarter of an inch.
The only reason for that is to give something to lay the carbon onto.
These bottles are built in an autoclave mold. After carbon is layed around the bottle, a high pressure bladder is layed around the carbon, and then vacuum is applied to pull the material tight against the form bottle (aluminum inner skin).
Air is then pumped simultaneously into the inside of the bottle and the autoclave up to around 200 PSI, creating equal pressure inside and outside the bottle and compressing the carbon very tightly.
200 PSI doesnt sound like much compared to the fill rating of the bottle, but this pressure sometimes shatters the bolts holding the autoclave together, resulting is a ruptured bottle.
After the carbon is cured, the pressure is released and the autoclave is taken off, bladders removed ect… Fittings added and bottle is tested.
The company I work for has made these in the past. Owner decided it was not a cost-effective product to build.
I guess I rambled, but the aluminum skin inside that carbon bottle will only hold about 150psi all by itself.
What’s the word Sluggo? we need info 😀
Hope you all have a Happy and Safe Holidays! Jim.
All
I have not had a chance to test this rifle. I was going to go on Friday but the weather was a factor.
Post soon with info..
Blackops
I wouldn’t worry too much about an aluminum tube. Aluminum is just as strong as other metals.
I am in a construction type business and all of the things that we use to make out of steel (10years ago) are now aluminum.
Carbon fiber 4500psi tanks have a 0.5 cm thin wall of a aluminum on the inside.
😆 Line forms behind me Corales 😉
😀 Jim.
Hi Sluggo ,
I would like buy a new sumatra 500cc , could you please help me to find one ?
I try to buy in pyramydair but they never heard of the new model?
Thanks and regards!
Hi Matt aluminum tanks aren’t scary but a small one like this air tube would need to have thick walls leaving little room for air…here’s a link to stainless seamless tube as I havn’t found a pressure rating on aluminum tube yet http://www.onlinemetals.com/merchant.cfm?pid=14876&step=4&showunits=inches&id=902&top_cat=1
Is there another metal like that is not magnetic? Chromoly? or ?
Really looking forward to the shooting report from Sluggo, I know I am VERY happy with mine so far and with 500cc’s I bet I’d be like 25% happier!
Jim.
Aluminum 😯 that is kinda scary….be REALLY curious to see how they pulled that off.
Jim.
Not that scary. Some scuba tanks are aluminum. I have a couple of spare air tanks that are rated above 3000psi and am told they last decades.
Boom is what kept me from buying a sumatra. That is a nice looking gun. And they do have some decent power out of the box. I will be wanting to see #s on this one too.
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So is this new Sumatra more powerful than the older version, or are they about the same?