Estes' So Long

[PhlAsh]

If I read it right, this thing has a 1.21" OD. Did Estes acquire someone else's 29mm motor tubes? What BT designation (if any) are they giving 'em?

 

[BEC]

They have their own 29mm motor tubes in many PSII kits. So Long is made from the same stock, just longer pieces.

I don't know if that stuff has a BT-size designation. It would have to be something between -50 and -55. Something is nagging at the back of my mind about "BTH-52" or "BT-52H" though.

 

[bad_idea]

Erockets calls it BTH-52 (and I'd guess Semroc did too). BMS calls it T52H.

 

[neil_w]

Hmm.

At the BMS website, they list BT-52H as 29mm motor mount:


However, in the OpenRocket parts database, BT52 is listed with very different dimensions (quite a bit smaller)


Something is amiss.

[edit] In the OR database (which nowadays is @caveduck 's parts DB) here is the listing for 29mm motor mount:


Note no mention of BT52 or BT52H. I am very confused.

Also I guess whatever long pieces of 29mm mount are used in the So Long are new parts.

 

[bad_idea]

Hmm.

At the BMS website, they list BT-52H as 29mm motor mount:
View attachment 610106

However, in the OpenRocket parts database, BT52 is listed with very different dimensions (quite a bit smaller)
View attachment 610108

Something is amiss.

Perhaps just a past clash of naming standards? There is that "H" in the 29mm motor mount names. The BMS stuff is correct in OpenRocket, BTW.

 

[neil_w]

Perhaps just a past clash of naming standards? There is that "H" in the 29mm motor mount names. The BMS stuff is correct in OpenRocket, BTW.

The H usually just means heavy-wall; ID should be the same between regular and H variety. Whatever is going on here it is weird.

 

[bad_idea]

The H usually just means heavy-wall; ID should be the same between regular and H variety. Whatever is going on here it is weird.

Agreed.

 

[BEC]

For whatever its worth, So Long uses two of the 31360 tubes (which are 8 inches long), one piece of the same stock six inches long, P/N 31148 (booster body), and one of the same stock which is 16.25 inches long, P/N 31963. This latter is the main sustainer body. The two 8 inchers are the lower sustainer body and the payload section tube.

 

[terryg]

Definitely a very cool design. What kind of trackers are being used with this kit (unless you consider it a single use model, lol).

 

[Zeus-cat]

A club member launched one yesterday and recovered both sections intact.

 

[BEC]

Definitely a very cool design. What kind of trackers are being used with this kit (unless you consider it a single use model, lol).

I've flown mine twice so far — once E16 to E16 (https://flightsketch.com/flights/4133/) and once F15 to F15 (https://flightsketch.com/flights/4135/). Had an Eggfinder (the regular one, not the Mini) in the payload section. I also added a big reflective streamer. It landed in sight both flights....of course.

 

[loopy]

A club member launched one yesterday and recovered both sections intact.

Not going to lie...I was impressed by that...