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  #1  
Old 01-18-2019, 07:32 PM
matthew matthew is offline
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Location: Cairns, Australia
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Default Where can I buy cluster centering rings these days?

Fliskits gone. Sunward basically out of the picture. Nothing listed on eRockets.

Who are the go-to guys/gals for cluster CRs now?
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  #2  
Old 01-18-2019, 07:55 PM
BARGeezer BARGeezer is offline
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Rocketarium:
https://www.rocketarium.com/Build/Cluster-Mounts
Rocket Garden still has Fliskit cluster mounts:
http://therocketgarden.com/FlisKits/FlisKits_index.htm
Erockets has a few, look under Parts for Rockets/Centering rings:
http://www.erockets.biz/semroc-cent...-sem-ra-4x5-60/
http://www.erockets.biz/bt-70-1/
http://www.erockets.biz/bt-80-1/
And BRS still has Sunward cluster mounts:
https://brshobbies.com/cluster-engine-mounts/
Or make your own and hone your scratch buiilding skills! Cheers.
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  #3  
Old 01-18-2019, 07:56 PM
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LeeR LeeR is offline
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I found plenty of cluster rings on eRockets.

Here is the page for BT-80, there are 4 listings. Make sure you read description. The pictures on some sizes don’t show a cluster ring.
http://www.erockets.biz/bt-80-1/

Also check BMS. balsamachining.com
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Old 01-18-2019, 08:03 PM
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LeeR LeeR is offline
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I posted same time as BARGeezer, forgot about Rocketarium. Looks like their BT-80 4x24mm mount has a 3D printed motor hook retainer. Cool!

A bit off-topic, I use their 18mm and 24mm motor retainers for my RMS motor hardware. Really nice!

Finally, a favorite way for me to hold cluster motors. Center mounted threaded insert, washer and capscrew holds motors. This is an upscaled Super Cobra, 4 x 24mm motors, in a BT-80. CRs from BMS. Washer was scalloped after construction started.
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Old 01-18-2019, 09:52 PM
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erik442 erik442 is offline
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I use a similar system on my LOC Viper. It's just an 8-32 machine screw with the head removed and a wing nut/washer. I like your allen bolt idea, it has a much cleaner look.
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  #6  
Old 01-19-2019, 06:30 AM
ASP ASP is offline
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Andy Jackson
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http://www.asp-rocketry.com
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  #7  
Old 01-19-2019, 11:47 AM
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Newbomb Turk Newbomb Turk is offline
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I'm always in the market for a two D cluster mount, ST-20.
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  #8  
Old 01-19-2019, 02:18 PM
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Jerry Irvine Jerry Irvine is offline
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Don't use them. Use cluster bulkheads and sufficiently/minimally long motor tubes.

http://v-serv.com/usr/kits/tall_tail_10_12.jpg

http://v-serv.com/usr/kits/tall_tail_10_13.jpg

Just Jerry

http://v-serv.com/usr/instaship-visual.htm

2.25" Tridents only 3 left at the ALPHA version price $80.

http://forums.rocketshoppe.com/showthread.php?t=17675
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  #9  
Old 01-19-2019, 02:37 PM
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LeeR LeeR is offline
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Quote:
Originally Posted by ASP


Andy,
Glad you posted. You have really good prices!
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  #10  
Old 01-20-2019, 03:25 AM
matthew matthew is offline
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Thanks for the tips, gentlemen. It looks like Rocketarium and BRS have what I need. I've been looking for a central motor with 4-6 outer motors.

You know, I looked all over erockets at the CR pages and didn't see them. I think I must have read the 3x50 etc as being a packet of 3 rather than cluster of 3.
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