A note about 38mm bay design - the tube diameter does not allow for much room to stack components, as you can in 54mm bay designs. The 38mm line introduces a short battery mount which provides a way of holding and retaining a battery in an area next to a radial switch and an altimeter platform. With some of the smaller altimeters, it is possible to do a custom long platform that incorporates a battery holder instead of requiring a mount for just the battery. I have already designed and made available a long PerfectFlite StartoLoggerCF platform with a 9 volt battery retainer. On an even smaller note, with a specific 300mah 2S LiPo battery, it is possible to stack a battery and an extra short platform (78mm long) for a compact 38mm bay that fits in a 6 inch long coupler tube.
Also, please make sure you order the correct 38mm coupler sized product. The parts that come in different sizes will have a choice of coupler tube size. There is a thin wall size that fits Blue Tube 2.0 and there is a think wall size that fits MadCow's 38mm coupler tube.
The DD (Dual Deploy) End Cap is a 5.9mm (0.23") thick cap with a 2.38mm (3/32") shoulder. The end cap is used on the removable end of a bay and attaches to a mounting ring.
The RDD (Redundant Dual Deploy) End Cap is a 5.9mm (0.23") thick cap with a 2.38mm (3/32") shoulder. The end cap is used on the removable end of a bay and attaches to a mounting ring.
The 38mm internal 1/4" motor retainer is used for both minimum diameter rockets as well as general motor retention for any rocket motor that has a Loki forward closure with a 1/4 threaded end.
The 38mm internal 5/16" motor retainer is used for both minimum diameter rockets as well as general motor retention for any rocket motor that has an Aerotech forward closure with a 5/16 threaded end.
The BT60/38mm Fin Holder is designed to hold a single fin in place while the root tab is glued in place whether it is a through wall or air frame surface mount.
The Captured Modular Nosecone Bay Kit is a complete set of SMT Designs parts that can be assembled into a fully functional module for the supported devices and batteries listed (customer supplies device and battery).
