Post by BroJames on Jan 5, 2008 18:11:39 GMT -5
The BHe BOOM
A challenge was thrown at Boom na Boom Airsoft Gamesite Saturday, January 5, 2008.
Some players said their 8.4v NiMH cannot crank a M120 spring so they threw a challenge at an airsofter who said that the BHe 7.4v 2000mAh 15C can crank the M120 and even higher springs. The challenge is if the BHe 7.4v cannot crank an aeg with spring setup of greater than M120, the airsofters who threw the challenge will chop off the head of the airsofter who said it can. I don't know if the airsofters are serious in chopping off heads but I guess we'll never find out. The airsofter who was challenged lived to tell the tale.
It was said that:
The Silent Majority of players at Boom na Boom already uses BHe 2150mAh.
Many (if not most) uses ICS aegs with M150 springs as the only upgrade.
To cut everything short, the test results are as follows:
7.4v BHe 2000mAh 15RPS* ROF chronoed at 580FPS
9.6v Bremen LiFe 17RPS ROF
11.1v BHe 20RPS ROF
(RPS= Rounds per second)
AEG used: ICS AK-47 with M150 spring as the only upgrade.
Chrono used: Guarder Speeder 2000 with ROF
As I understand it, after the initial test was done, a few players who cannot believe the results came forward with their own ICS with M150 springs as the only upgrade and plugged in the BHe 7.4v 2000mAh LiPoly ang got the same results. But those puzzled, or amazed, asked how can that be?
When I was first invloved in airsoft, all I understand was Voltage = Power and mAh = longetivity or number of BBs fired. After LiPolies came out I later learned that while Voltage affects ROF in no small way, the Drawable Current(A) which is C x mAh or in the case of a 15C x 2000mAh LiPoly or 30,000mA determines the available power of a battery. In comparison, a 9.6v NiMH with 5C x 2000mAh or 10,000mA is simply no match. For this reason, the small BHe 7.v LiPolies can crank a M150 spring while a big 8.4v Sub-C can't crank a M120 srping with reasonable ROF.
To those who are starting to get the drawable current picture, let's introduce the internal impedance factor (which composed of various forms of resistance in a battery). The lower the internal impedance or resistance the faster energy is released from the battery to crank the spring. If this is starting to give you a headache, believe me, my head aches too as I am not a technical person. For this reason, let's just stick to the "C" x mAh = Drawable Current when we talk batteries.
The BHe 7.4v 2000mAh LiPoly for MP5 Handguard (top), BHe 7.4v 2200mAh LiPoly for M4 handguard (middle), and BHe 7.4v Stick 1350mAh LiPoly for M4 Retractable Metal Tube, MP5K & AKS74U, etc are all recommended for up to M120 springs on stock gears and M130 springs on STU or 300% gears. While it can crank M150 springs with relative ease and reasonable ROF (MilSimEmpire survey shows that ROF of 15 rounds per second is the most preferred by their players) number of BBs fired poer charge may be compromised because of the higher current needed to crank higher springs.
Click Me for link to Airsplat.com on use of 7.4v LiPoly summarized as follows
KWA G36C with (M)120 spring
8.4v 1500mAh Large battery Audacity shows 13 SPIKE per second
9.6v 1200mAh Mini (not fully charge). 15.4 bb's per second
7.4v 2200mAh Lipo Audacity shows 17.5 SPIKE per second.
A challenge was thrown at Boom na Boom Airsoft Gamesite Saturday, January 5, 2008.
Some players said their 8.4v NiMH cannot crank a M120 spring so they threw a challenge at an airsofter who said that the BHe 7.4v 2000mAh 15C can crank the M120 and even higher springs. The challenge is if the BHe 7.4v cannot crank an aeg with spring setup of greater than M120, the airsofters who threw the challenge will chop off the head of the airsofter who said it can. I don't know if the airsofters are serious in chopping off heads but I guess we'll never find out. The airsofter who was challenged lived to tell the tale.
It was said that:
The Silent Majority of players at Boom na Boom already uses BHe 2150mAh.
Many (if not most) uses ICS aegs with M150 springs as the only upgrade.
To cut everything short, the test results are as follows:
7.4v BHe 2000mAh 15RPS* ROF chronoed at 580FPS
9.6v Bremen LiFe 17RPS ROF
11.1v BHe 20RPS ROF
(RPS= Rounds per second)
AEG used: ICS AK-47 with M150 spring as the only upgrade.
Chrono used: Guarder Speeder 2000 with ROF
As I understand it, after the initial test was done, a few players who cannot believe the results came forward with their own ICS with M150 springs as the only upgrade and plugged in the BHe 7.4v 2000mAh LiPoly ang got the same results. But those puzzled, or amazed, asked how can that be?
When I was first invloved in airsoft, all I understand was Voltage = Power and mAh = longetivity or number of BBs fired. After LiPolies came out I later learned that while Voltage affects ROF in no small way, the Drawable Current(A) which is C x mAh or in the case of a 15C x 2000mAh LiPoly or 30,000mA determines the available power of a battery. In comparison, a 9.6v NiMH with 5C x 2000mAh or 10,000mA is simply no match. For this reason, the small BHe 7.v LiPolies can crank a M150 spring while a big 8.4v Sub-C can't crank a M120 srping with reasonable ROF.
To those who are starting to get the drawable current picture, let's introduce the internal impedance factor (which composed of various forms of resistance in a battery). The lower the internal impedance or resistance the faster energy is released from the battery to crank the spring. If this is starting to give you a headache, believe me, my head aches too as I am not a technical person. For this reason, let's just stick to the "C" x mAh = Drawable Current when we talk batteries.
The BHe 7.4v 2000mAh LiPoly for MP5 Handguard (top), BHe 7.4v 2200mAh LiPoly for M4 handguard (middle), and BHe 7.4v Stick 1350mAh LiPoly for M4 Retractable Metal Tube, MP5K & AKS74U, etc are all recommended for up to M120 springs on stock gears and M130 springs on STU or 300% gears. While it can crank M150 springs with relative ease and reasonable ROF (MilSimEmpire survey shows that ROF of 15 rounds per second is the most preferred by their players) number of BBs fired poer charge may be compromised because of the higher current needed to crank higher springs.
Click Me for link to Airsplat.com on use of 7.4v LiPoly summarized as follows
KWA G36C with (M)120 spring
8.4v 1500mAh Large battery Audacity shows 13 SPIKE per second
9.6v 1200mAh Mini (not fully charge). 15.4 bb's per second
7.4v 2200mAh Lipo Audacity shows 17.5 SPIKE per second.