Recently I was given the opportunity to test and review a servo operated barrel recoil unit by a local company, the "Recoiler Mod B-1" by JVM3Dconcepts. It's a 3DP item, made of high strength resin, designed to fit in Heng Long tank turrets. It allows the barrel to snap back upon firing and to slowly return to battery. It replaces the stock Airsoft gun, so one can't fire pellets anymore.
Announcement
Collapse
No announcement yet.
New Recoiler Unit
Collapse
X
-
Form follows Function:
The Mod B-1 is similar to the Clark recoil unit, which makes sense as it has to fit into the same space. The Mod B-1 handles the recoil, while the tank's elevation function is retained by the motor system. It can be run by the side type motor that connects to the side groove, or the rear type motor that pushes the tab sticking out of the back of the unit. On the B-1, this can be omitted if not needed. A positive feature of the B-1 is the versatility of the servo mount. The servo can be mounted with the gear towards the front or rear as desired, and the gear wheel can be mounted in different ways to the servo. This was helpful when I had to change servos at one point. Each brand has a slightly different shape!
Twenty six tanks, and not done yet!
- Likes 1
Comment
-
How to put it in:
So how easy is it? If you've installed units like this before you can skip over the next. I put mine in a Sherman turret that will eventually be part of a Kelly's Heroes Sherman modification. (JVM has tested it in a number of HL and TD tanks.)
Here's the starting point, with the turret bottom removed showing the Airsoft unit and the side motor I mentioned earlier.
I've removed the gun/mantlet/barrel assembly from the turret.
Remove the mantlet from the airsoft gun. The barrel will then slide out from the back of the mantlet.
Put the barrel back in the mantlet, attach the B-1 to the mantlet, and snap the unit beck into the turret. Make sure the side motor is mated correctly to the B-1.
Twenty six tanks, and not done yet!
- Likes 2
Comment
-
My opinion? Very positive. This is a prototype and based on some suggestions will have a couple of changes in the next version. This one fits well and works as desired. JVM3Dconcepts is a small batch enterprise run by experienced hobbyists. When the final version of this unit is ready, it will available on Rich Johnson's website, RichardSJohnson.net.
A closeup view of the installation:
Twenty six tanks, and not done yet!
- Likes 4
Comment
-
Originally posted by MrChef View PostInteresting.
Are the dimensions similar, smaller or larger than the current Heng long units?
Is there a spot to mod or cutout in the unit to fit a flash and smoke unit or LED for IR battle?Twenty six tanks, and not done yet!
- Likes 1
Comment
-
Thank you for this awesome demo and tutorial Bob, you saved me all the work of doing the same thing.
As Bob said they will be on my website very soon.RC tank parts and accessories I make
www.RichardSJohnson.net/id28.html
- Likes 3
Comment
-
Originally posted by MrChef View PostInteresting.
Are the dimensions similar, smaller or larger than the current Heng long units?
Is there a spot to mod or cutout in the unit to fit a flash and smoke unit or LED for IR battle?
- Likes 1
Comment
-
Originally posted by Operator7G View PostThis looks pretty cool. I'll be interested to see an example with the barrel flash/smoke.
- Likes 1
Comment
-
Originally posted by Rubicon99 View Post
The Mod B1 is designed with a full length shuttle and internal "bore" larger then the stock HL barrels bore so adding flash and the associated wires is super easy because there is more room. Much more then on any other servo recoil of this type.
inquiring minds want to know.....more....
Comment
-
Originally posted by Zippersnapper View Post
As we know the HL recoiling barrel assembly has a smaller diameter "shuttle" that the actual barrel slides on. Is it safe to assume this universal recoiling assembly would allow ANY tank barrel to ride on it, if it were removed from a stock mantlet ? In other words, tanks that dont come with a BB recoiling unit ? You say the "bore" is bigger, but will any tank barrel fit over the shuttle?
inquiring minds want to know.....more....
Shown below is a HL Panther barrel laying between the Mod B1 and recoil "barrel shuttle" and then installed in the shuttle.
This photo is of a HL M4 barrel.
HL M4 barrel "in battery"
HL M4 barrel "out of battery" aka max recoil position. This is just an exaggerated example not how it should actually recoils in the tank.
Here are a few of the "breach" section of the Mod-B1 recoil unit.
"Shuttle" bore is 8.44mm wide and runs the entire length of the shuttle. Mine is the "extreme duty" version note the spiral cuts on the shuttle. These are added for self cleaning if you run the unit dry or can be used to hold extra ceramic grease or other lube for those that want to run the shuttle "wet". I will be running the unit dry because it is rather slick already and the added cleaning benefits are useful to me given the dusty conditions I drive my tanks in often.
- Likes 2
Comment
-
Originally posted by bntix View PostIt’s a great design. Do you know how to buy the design? Doesn’t make sense to ship from US to Vietnam. Shipping cost gonna more than the item itself.
- Likes 1
Comment
-
Yeah, thanks guys for your feedback. I contacted Richard on instagram. He doesn’t sell STL file. If I buy a batch of 10 then the shipping cost start making sense. But 10 just simply too much. I will just need to deal with existing design I bought from Cults3D or hope somebody will work on this design and sell it on Cults3D/other platforms later. Thanks all ;-)
Comment
-
Originally posted by DavidN View Post
If you are trying to achieve servo recoil with the 7.0 MFU you may not know this, but there is a product made that allows the 7.0 MFU to be used with a servo. There is a thread about it somewhere on this forum. From what I remember it's cheap and largely plug and play simple and does not require modifications to the servo lines.
- Likes 2
Comment
Comment