Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > Work Bench > 3D Printing Asylum
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 12-14-2019, 06:49 PM
PaulK PaulK is offline
BAR
 
Join Date: Nov 2005
Location: WI
Posts: 1,847
Default Looking for Maxi Honest John fins

I'm planning to build a Maxi Honest John this winter, and was wondering if anyone's printed fins for it. I've looked through thingverse, shapeways, and boyce aerospace, and haven't found any files yet. I'll beef up the stock fins if needed, but thought I'd see if 3D printed fins was an option.
__________________
Paul
If we weren't all crazy, we would go insane - Jimmy Buffett
NAR #87246 www.wooshrocketry.org
Reply With Quote
  #2  
Old 12-15-2019, 07:42 AM
jetlag jetlag is offline
Old BAR
 
Join Date: Aug 2006
Posts: 2,279
Default

Quote:
Originally Posted by PaulK
I'm planning to build a Maxi Honest John this winter, and was wondering if anyone's printed fins for it. I've looked through thingverse, shapeways, and boyce aerospace, and haven't found any files yet. I'll beef up the stock fins if needed, but thought I'd see if 3D printed fins was an option.


Boyce aerospace is your Huckleberry! He has them, I think.
Allen
Reply With Quote
  #3  
Old 12-15-2019, 01:39 PM
BARGeezer BARGeezer is offline
Avid Builder
 
Join Date: Nov 2017
Posts: 610
Default

Boyce Aerospace has the BT-80 fin unit (fins and fin can) in their builders kit. You can inquire as to whether they will sell you the unit separately and at what price point. Or ask if they can print only the fins without the can.
Also Aerobotix at Shapeways has BT-50,55, and I think 60 Hojo fins. Ask Kevin Cespedes at Aerobotix if he can upscale those for a BT-80 Maxi Hojo, and at what price.
Don't think either of those vendors will give you their files to upscale, though.
__________________
I like the unusual, the off beat, the avant-garde. No 3/4 FNC for me!
Reply With Quote
  #4  
Old 12-15-2019, 04:01 PM
Flash's Avatar
Flash Flash is offline
Semi-Pro Rocketeer TRA 10484 L2
 
Join Date: Apr 2007
Posts: 428
Default

Pic of 3D parts that Boyce Aerospace makes
Attached Thumbnails
Click image for larger version

Name:  Honest John BT 80 parts.jpg
Views: 57
Size:  81.7 KB  
__________________
=======================
If the Sky is the Limit, then,
why is there Footsteps on the Moon?
=======================
Reply With Quote
  #5  
Old 12-16-2019, 01:16 AM
LeeR's Avatar
LeeR LeeR is offline
Retired with Way Too Many Kits
 
Join Date: Jun 2007
Location: Colorado
Posts: 3,222
Default

Quote:
Originally Posted by PaulK
I'm planning to build a Maxi Honest John this winter, and was wondering if anyone's printed fins for it. I've looked through thingverse, shapeways, and boyce aerospace, and haven't found any files yet. I'll beef up the stock fins if needed, but thought I'd see if 3D printed fins was an option.


I am working on my Maxi HoJo, and using the same technique used to beef up the vacuformed fins on the Maxi V-2. The article was in TRF a few years ago, by James Duffy. He used CA to attach the fin halves onto. 1/32” balsa, then used wood glue to glue the balsa sheets together. I am using the same method, but using basswood since I could not find quality 1/32” balsa. The first fin seems a little thick to me, and in retrospect I wish I would have bonded both halves to just one piece of basswood. I cannot quit now, it would look to odd to have 3 thinner fins. I may just finish it, fly it, and think about replacing with a Boyce fin can at some point.

Here is link to article.

https://www.rocketryforum.com/threa...ute-v-2.140236/
__________________
Lee Reep
NAR 55948

Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp
Reply With Quote
  #6  
Old 12-16-2019, 04:19 PM
jeffyjeep's Avatar
jeffyjeep jeffyjeep is offline
Old Submariner
 
Join Date: Jan 2009
Location: Home of Wayne & Garth
Posts: 7,760
Default

....or you could attempt an upscale of my built up fin technique that I used on the current version. It’s described in detail in my thread “built up fins for the new HoJo”.
__________________
Never trust an atom. They make up everything.

4 out of 3 people struggle with math.

Chemically, alcohol IS a solution.

NAR# 94042
SAM# 0078
Reply With Quote
  #7  
Old 12-21-2019, 08:48 AM
PaulK PaulK is offline
BAR
 
Join Date: Nov 2005
Location: WI
Posts: 1,847
Default

Quote:
Originally Posted by jeffyjeep
....or you could attempt an upscale of my built up fin technique that I used on the current version. It’s described in detail in my thread “built up fins for the new HoJo”.
I may do just that, thanks Jeff. The fin can from Boyce is $60 + $12 shipping - while I'm sure it's a great fin can, the Maxi-Brute kit simply isn't worth that much upgrade cost.

Here's your thread:
https://www.oldrocketforum.com/showthread.php?t=15611

I like the idea of a TTW core, yet keeping the kit's skins. The hardest part will be getting the correct bevel on the stringers for a tight fit with the skins. Dowels would be too large for these fins (1/4"), so I'll probably use basswood strips, which will be easier to bevel.
__________________
Paul
If we weren't all crazy, we would go insane - Jimmy Buffett
NAR #87246 www.wooshrocketry.org
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -5. The time now is 06:03 AM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe © 1998-2024