LHTCU - High powered string version

2024-10-03 Update : Added 20mm to plunger to allow 150mm of draw length

2024-08-10 Update : Added a printed barrel option

This is a remix of the LHTCUBL-T2 by Ian Whitehouse, but modded with a Frayed Knot stringer conversion by gargunkle. I remixed the stringer conversion to allow Caliburn sized plunger tube instead of Esper sized one.

The goal is to build an ultra low cost, Canadian sourced, high powered blaster. Including hardware and filament, this costs 55$CAD (~$40USD) in materials and I just chronographed it at 250fps.

Shooting video, pay attention at how quiet a stringer is. Chronograph in m/s, 78 = 256fps

I'll try to reduce costs in further updates, hopping to get under 40$CAD with the final blaster design.

Hardware :

1-1/2 sink drain tube cut to 185,7mm https://www.rona.ca/en/product/plumb-pak-1-pack-1-1-2-in-x-12-in-abs-sink-tailpiece-black-pp906b-12365478 (Or Caliburn plunger tube, either an official one or Silly's printed version : https://www.printables.com/model/875619-printed-plunger-tubes-for-15od-pt-blasters)

12" 17/32 brass tube https://a.co/d/hAgWT9a

3x O-123 o-rings https://a.co/d/2Xk57sg (This is for 100 o-rings)

2x 3/8"x1/2"x1/16" o-rings https://www.canac.ca/fr/joints-toriques-3-8-po-x-1-2-po-pqt-6-3180019

2x 1/2"x5/8"x1/16" o-rings https://www.canac.ca/fr/joints-toriques-1-2-po-x-5-8-po-pqt-6-3180016

2" elastic band

3/16" elastic nylon bungee cord https://a.co/d/eupMMLU

~770g of filament

Barrel :

Original files fit for a 16mm barrel. 

STL provided to directly fit a 17/32 brass barrel instead.

STL provided to directly fit a printed barrel instead.

Print and build instructions :

Follow LHTCUBL T2 assembly guide here : https://www.printables.com/model/401716-lhtcubl-t2/files

All files are in correct orientation.

Only REMIX_ptBack_Caliburn_Length.stl needs standard supports, all the rest can print supportless.