80 shot Marauder M-Rod Double, FT tune
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All Springer/NP/PCP Air Gun Discussion General
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"Bob and Lloyds Workshop"
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80 shot Marauder M-Rod Double, FT tune
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Topic: 80 shot Marauder M-Rod Double, FT tune (Read 3950 times))
lloyd-ss
Bob and Lloyd
GTA Senior Contributor
Posts: 3567
Real Name: Lloyd
80 shot Marauder M-Rod Double, FT tune
«
on:
January 14, 2015, 08:24:13 AM »
This past summer, Tyler Patner asked the Airgun Lab if we could help with an auction supporting the US Field Target team. The Airgun Lab is always a sucker for worthy airgun causes, so of course the answer was, "Yes." Pyramyd Air supplied the new .177 cal Gen 2 Marauder rifle,
www.discosrus.net
supplied the laminated stock, and the Airgun Lab supplied the M-Rod Double kit, and did the installation and tuning.
The winner of the Gun Broker auction wanted the gun set up for FT, shooting .177 caliber 10.5 gn pellets in the 875 fps range. The installation went well, but the tuning was a new effort, searching for maximum shot count at medium power, instead of the usual max power approach. But using standard tuning methodologies and one new internal part, the results were pleasantly surprising, in fact, much better than I was expecting.
The results could be called, "boringly consistent."
80 shots with a 2% velocity spread on a single fill.
And that is with NO REGULATOR ! Starting pressure 3000 psi and ending pressure 2200 psi. The 60% extra air provided by the M-Rod Double tube kit made it possible.
Lloyd Sikes
A chart of the final test data before the gun was shipped to its new owner. The owner has confirmed the performance.
The velocity graph (the blue line) is read on the left hand vertical axis. The power in FPE is the red line and
is read on the right hand vertical axis.
The new stock from
www.discosrus.net
looks incredibly sharp! The stocks that come
with the Gen2 Marauder cannot be modified
to accept the new double
tube, but the Gen 1 can be.
The standard barrel band with the double kit has a Picatinny rail on the
bottom to fit a bipod or other accessory.
The new tube is high strength aircraft aluminum alloy 2024T3 to keep the weight down and
still provide good volume and a comfortable 3 to 1 strength safety factor.
Logged
Central Virginia
An engineer by nature. The affliction is knowing that everything can be made better. It is easy to make one that works, but it is difficult to make on that works WELL.
My YouTube channel is Airgun Lab
Motorhead
Field Target Shooter .... Stand em up Shoot em down
GTA Senior Contributor
Posts: 17763
2019 GTA Hall Of Fame Recipient
Real Name: Scott
Re: 80 shot Marauder M-Rod Double, FT tune
«
Reply #1 on:
January 14, 2015, 12:24:30 PM »
Great work Lloyd !!
But just think what would be achievable if regulated
Tank volume likely to fall to @ 340 cc and with efficiency in @ 1.3 or better ( proven realistic ) talking 150 range.
maybe on the next one
Logged
Northern California ... Old Hangtown
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Home of MOTORHEADS AG Tuning Services
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* PM me for further contact & tuning info.
Sacramento Valley Field Target Club
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https://sites.google.com/site/sacvalleyairgunclub/
lloyd-ss
Bob and Lloyd
GTA Senior Contributor
Posts: 3567
Real Name: Lloyd
Re: 80 shot Marauder M-Rod Double, FT tune
«
Reply #2 on:
January 14, 2015, 01:32:21 PM »
Thanks Scott. Yes, I've been getting a lot of pressure
, suggestions, inquiries, and some help about the opportunity for a regulator in all of the the double tubes. It does make a lot of sense and I'm working on some ideas with some assistance from one of our brethern. Something is coming, it is just a matter of when!
Lloyd
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Central Virginia
An engineer by nature. The affliction is knowing that everything can be made better. It is easy to make one that works, but it is difficult to make on that works WELL.
My YouTube channel is Airgun Lab
Motorhead
Field Target Shooter .... Stand em up Shoot em down
GTA Senior Contributor
Posts: 17763
2019 GTA Hall Of Fame Recipient
Real Name: Scott
Re: 80 shot Marauder M-Rod Double, FT tune
«
Reply #3 on:
January 14, 2015, 09:07:06 PM »
Lloyd,
Just to toss it out ... If ever wish to go down the path of Regulation within the M-rod platform ? do look me up and would be happy to share the R&D details accumulated doing many of them these past couple years.
Scott
Logged
Northern California ... Old Hangtown
**
Home of MOTORHEADS AG Tuning Services
**
* PM me for further contact & tuning info.
Sacramento Valley Field Target Club
#
https://sites.google.com/site/sacvalleyairgunclub/
lloyd-ss
Bob and Lloyd
GTA Senior Contributor
Posts: 3567
Real Name: Lloyd
Re: 80 shot Marauder M-Rod Double, FT tune
«
Reply #4 on:
January 14, 2015, 10:17:49 PM »
Scott,
How can I say no to an offer like that?
Lloyd
Logged
Central Virginia
An engineer by nature. The affliction is knowing that everything can be made better. It is easy to make one that works, but it is difficult to make on that works WELL.
My YouTube channel is Airgun Lab
Tpatner412
GTA Moderator
GTA Senior Contributor
Posts: 2820
Real Name: Tyler
Re: 80 shot Marauder M-Rod Double, FT tune
«
Reply #5 on:
January 14, 2015, 10:24:14 PM »
Lloyd
So glad to see this info finally posted for all to see. That gun is quite incredible. When you told me the initial numbers, I didn't believe it! Then I shot it some for myself....just incredible.
On the reg front, I could see a reg being useful in a .22 or .25 set up but in the .177....with that shot count and a sub 20 fps deviation, a reg is not needed. That's a whole match of shooting with no POI change, even at 50 yards. Heck, I'm happy when my reg'd guns do that. It's all you need them to do. But on the higher power guns, that could save one a good bit of air and deliver a lot of consistency! I'd like to see a double tubed reg'd set up on a .25. That would intrigue me personally. The Green Mountain barrel on that kind of set up could shine at some insane distances for more than just 1 magazine LOL!!!
Looking forward to seeing what other upgrades this leads to!
Tyler
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Cleveland, OH
Pyramyd Insyder
Pyramyd Air Field Target Team
Current Stable:
Thomas FT Carbine
Ripley AR5s .177, Gary Cane Stock
Air Arms NJR 100
FWB 601
Edgun Leshiy 2
lloyd-ss
Bob and Lloyd
GTA Senior Contributor
Posts: 3567
Real Name: Lloyd
Re: 80 shot Marauder M-Rod Double, FT tune
«
Reply #6 on:
January 14, 2015, 10:44:45 PM »
Thanks Tyler, I am glad the gun has worked out so nicely. Things are hard to predict sometimes.
The way a good regulator can flatten out a shot string almost makes it seem a little like cheating, especially with the higher powered airguns.
Lloyd
Logged
Central Virginia
An engineer by nature. The affliction is knowing that everything can be made better. It is easy to make one that works, but it is difficult to make on that works WELL.
My YouTube channel is Airgun Lab
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All Springer/NP/PCP Air Gun Discussion General
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ezman604
,
amb5500c
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80 shot Marauder M-Rod Double, FT tune