HDEM - Heavy Duty Engine Mounts
are now available from Odd'l Rocket vendors!
Now at JonRocket.com - at more vendors soon!
Features:
Extended Length Spring Steel Engine Hook
3" long engine hook allows engine block to be positioned under the top bend
of the hook. No more worn tube slots or loose engine hooks!
Replaceable Kevlar Line Design
Kevlar tie is looped under lower centering ring.
Small guide tube along the side of the mount allows you to check the
condition of the Kevlar and replace if needed.
Heavy Wall BT-20H Engine Tube
Stronger BT-20 tube for long life
Works great with the new, more powerful 18mm Quest Composite engines
and general model rocket use.
Now at JonRocket.com - at more vendors soon!
Very nice design. Commercializing the replaceable Kevlar design is a great idea.
ReplyDeleteThanks Neil,
DeleteI've been wanting to do this for while, combining my replaceable Kevlar idea with the heavy wall tubing and extended engine hook.
I've been wanting to try the replaceable Kevlar but my last few builds have all had tail shrouds that have made it impossible. Haven't come up with a way to adapt it to that situation yet.
DeleteHi Neil,
DeleteNope - Not easy to do a replaceable Kevlar line with a tail shroud.
Great design, Chris! I still think back to the early days of building, and making slits in the body tube, then gluing in the rubber shock cord. Hard to believe anybody ever thought that was a good technique. :-)
ReplyDeleteHi Lee,
DeleteThat and Estes using a tri-fold mount in a BT-5 or BT-20 tube. Just what you need, something to block the parachute and wadding ejection.
Those centering rings look fairly thick too - are the HD as well?
ReplyDeleteHi Openroad,
DeleteThe centering rings are black Letramax material, it's .050" thick. A bit denser than what you would see in a LPR kit. The rings are custom cut to fit the thicker walled BT-20H tubing. There are holes cut for the Kevlar guide tube and engine hook relief.