Shop our online catalog for amazing deals.Thursday, November, 22, through Monday, November, 26, 2018. JonRocket.com’s 2018 Holiday Sale features deep discounts off our already low prices on rocket kits, parts, accessories, and supplies.
US orders which total $48 or more ship for free and all orders at JonRocket.com earn Rewards Points.
During the sale, please understand that we won’t be able to ship
orders as quickly as normal. Sale prices are good only on in-stock items
and the sale prices will be updated daily based on remaining stock.
Here are reasons why you should be excited about the new BT20-H body tube.
The BT-20H is thicker and more durable than a standard BT-20. The inside diameter of the BT-20H is the same as the inside diameter of a standard BT-20 body tube, 0.710 inches (just a hair over 18mm). But, the wall of the BT-20H is about 60% thicker – 0.021 inches thick versus 0.013 inches for a plain BT-20. This extra thickness makes the tube much stronger.
The BT-20H is perfect for 18mm motor mounts. A rocket’s motor mount can take some abuse as you insert and remove motors and during flight from the thrust of the motor and the ejection charge, so the extra strength of the BT-20H makes it a good choice in motor mounts for standard size motors. The inside diameter of the BT-20H is the same as the BT-20, so you can use a standard 18mm thrust ring. Standard engine hooks also work and there’s less chance of the tube tearing in the slot you make for the top of the hook. A more robust engine mount made with a BT-20H is perfect for use with the powerful 18mm composite D motors from Quest.
You can use standard centering rings. Even though the outside diameter of the BT-20H is larger than the BT-20’s, you can still use standard BT-20 centering rings. The inside of a standard centering ring can easily be sanded (or peeled) to fit the slightly larger diameter of the BT-20H.
You can use standard nose cones.Standard BT-20 nose cones fit the BT-20H tubes. Because the BT-20H is slightly larger in diameter than a BT-20, there might be a small lip around the end of the body tube.
The thicker BT-20H provides better heat resistance than thinner BT-20 tubes. Being more resistant to the effects of the motor’s ejection charge makes the BT-20H a better choice for motor tubes and, especially, for stuffer tubes.
BT-20Hs are easier to work with. Being thicker and more durable makes the BT-20Hs easier to cut and less likely to be crushed during construction of a rocket.
The BT-20Hs open up new possibilities. A stronger body tube allows for more complex designs such as rockets with strap-on boosters or extra-long “super-rocs.”
Begin the holiday season with savings during JonRocket.com’s 2015 holiday sale.
JonRocket.com’s annual Holiday Sale will run from Wednesday, November 25 through Monday, November 30 (EDT). Almost everything at JonRocket.com will be on sale at discounts of up to 50% off our regular low prices.
Orders shipped to the US which are $40 or more ship for free and all orders earn Rewards Points.
During the sale, please understand that we won’t be able to ship orders as quickly as normal. Sale prices are good only on in-stock items and the sale prices will be updated daily based on remaining stock.
During the sale and through the end of 2015, you will earn one Rewards Point for each $10 spent. Starting on January 1, 2016, we will be awarding one rewards point for each $20 spent. You will still be able to redeem each Rewards Point for $1 towards a future purchase.