Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > Work Bench > Scale & Sport Scale Rocketry
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 11-29-2020, 04:32 PM
Ez2cDave's Avatar
Ez2cDave Ez2cDave is offline
Master Modeler
 
Join Date: Mar 2005
Posts: 754
Default

Charles,

I hope the attached items are helpful.

Dave F.
Attached Thumbnails
Click image for larger version

Name:  Malemute Tail Planform dwg.jpg
Views: 16
Size:  101.6 KB  Click image for larger version

Name:  Nike-Malemute dwg.jpg
Views: 15
Size:  117.4 KB  
Attached Files
File Type: pdf MALAMUTE DEVELOPMENT PROGRAM - DIMENSIONS.pdf (1.29 MB, 7 views)
__________________
"Failure Is Not An Option . . . Adapt & Overcome ! "

NAR # 26128 L2
TRIPOLI # 517 L2 ( inactive, at present )
Reply With Quote
  #12  
Old 11-29-2020, 09:16 PM
Chris_Timm's Avatar
Chris_Timm Chris_Timm is offline
Craftsman
 
Join Date: Mar 2006
Location: Bay City, Michigan
Posts: 350
Default

The drawing is to scale.

Proportioned measurements for Terrier fins:

Fin root length 30.8" (42.2" if swept length is included)
Fin tip length 5.6"
Fin leading edge cuff 1.5"
Fin Tip Trailing edge width 1.8"
Fin root trailing edge width 4.6"
Overall Fin span 59.8"
Reply With Quote
  #13  
Old 11-30-2020, 08:50 AM
aeppel_cpm aeppel_cpm is offline
Ciderwright
 
Join Date: Apr 2013
Location: Burlington, WI
Posts: 596
Default

That's -really- similar to the Malemute fins, scaled from 16" motor diameter to 18". Except the tip chord. The Terrier swept delta fin has a smaller tip chord, and maybe a slightly wider span. I didn't run all the numbers.

Grrr... now I'm contemplating making a proper variant of the Terrier at this scale. That means i have to make a couple more 3.44" tubes. Well, the holidays are coming up and I've got plenty of vacation time.

A Talos with the Terrier-esque fins would be more challenging - I don't have another piece of 5" shipping tube. And probably wouldn't use it if I had. That stuff is -heavy-.
__________________
Charles McGonegal
Ciderwright
AEppelTreow Winery & Distillery
Ad Astra Tabernamque!
Reply With Quote
  #14  
Old 11-30-2020, 11:36 AM
Ez2cDave's Avatar
Ez2cDave Ez2cDave is offline
Master Modeler
 
Join Date: Mar 2005
Posts: 754
Default

Quote:
Originally Posted by aeppel_cpm
A Talos with the Terrier-esque fins would be more challenging - I don't have another piece of 5" shipping tube. And probably wouldn't use it if I had. That stuff is -heavy-.


Charles,

Peel the inside layers and use a single layer of lightweight fiberglass cloth on the exterior or use Rick Boyette's "Quasi-Glass" method for reinforcement !

Dave F.
Attached Files
File Type: pdf Quasi.pdf (416.0 KB, 4 views)
__________________
"Failure Is Not An Option . . . Adapt & Overcome ! "

NAR # 26128 L2
TRIPOLI # 517 L2 ( inactive, at present )
Reply With Quote
  #15  
Old 11-30-2020, 11:54 AM
tbzep's Avatar
tbzep tbzep is offline
Dazed and Confused
 
Join Date: Mar 2005
Location: TN
Posts: 10,103
Default

Quote:
Originally Posted by Ez2cDave
Charles,

Peel the inside layers and use a single layer of lightweight fiberglass cloth on the exterior or use Rick Boyette's "Quasi-Glass" method for reinforcement !

Dave F.

I don't think the hose will add much strength. I'd just give the tube a thin coat of resin and not go through the hassle of funny looks in the lingerie dept.
__________________
I love sanding.
Reply With Quote
  #16  
Old 11-30-2020, 12:13 PM
aeppel_cpm aeppel_cpm is offline
Ciderwright
 
Join Date: Apr 2013
Location: Burlington, WI
Posts: 596
Default

In my case, I 3D printed a 'sleeve' to go over the cardboard to expand the diameter to scale. I'm not worried about the strength.

I -should- have peeled the inside diameter. And would, If I did it again. I think I've epoxied the centering rings in place. If I haven't, then maybe I'll do the peel job. Otherwise I'll resign myself to 6 grain 38mm motors and a pound of nose weight.
__________________
Charles McGonegal
Ciderwright
AEppelTreow Winery & Distillery
Ad Astra Tabernamque!
Reply With Quote
  #17  
Old 11-30-2020, 01:23 PM
Ez2cDave's Avatar
Ez2cDave Ez2cDave is offline
Master Modeler
 
Join Date: Mar 2005
Posts: 754
Default

Quote:
Originally Posted by tbzep
I don't think the hose will add much strength. I'd just give the tube a thin coat of resin and not go through the hassle of funny looks in the lingerie dept.


That was Rick's initial approach . . . Later, for HPR, he started using "Drain Sleeve" material.

I have a PDF of that, but it is too large to upload . . . Let me see what I can come up with !

Dave F.
__________________
"Failure Is Not An Option . . . Adapt & Overcome ! "

NAR # 26128 L2
TRIPOLI # 517 L2 ( inactive, at present )
Reply With Quote
  #18  
Old 11-30-2020, 01:38 PM
Ez2cDave's Avatar
Ez2cDave Ez2cDave is offline
Master Modeler
 
Join Date: Mar 2005
Posts: 754
Default

Rick Boyette's "Quasi-Glass" method . . .

The first 9 images show the HPR "Drain Sleeve" method . . . The last 2 images show the "Pantyhose Method".

"Drain Sleeve" . . .

https://www.lowes.com/pl/Drain-slee...ment=4294801513

Dave F.
Attached Thumbnails
Click image for larger version

Name:  DRAIN SLEEVE - 1.JPG
Views: 3
Size:  21.5 KB  Click image for larger version

Name:  DRAIN SLEEVE - 2.JPG
Views: 4
Size:  176.6 KB  Click image for larger version

Name:  DRAIN SLEEVE - 3.JPG
Views: 3
Size:  185.9 KB  Click image for larger version

Name:  DRAIN SLEEVE - 4.JPG
Views: 6
Size:  157.0 KB  Click image for larger version

Name:  DRAIN SLEEVE - 5.JPG
Views: 5
Size:  170.2 KB  Click image for larger version

Name:  DRAIN SLEEVE - 6.JPG
Views: 4
Size:  192.8 KB  Click image for larger version

Name:  DRAIN SLEEVE - 7.JPG
Views: 5
Size:  173.3 KB  Click image for larger version

Name:  DRAIN SLEEVE - 8.JPG
Views: 5
Size:  131.7 KB  Click image for larger version

Name:  ORIGINAL METHOD - 01.JPG
Views: 4
Size:  211.0 KB  Click image for larger version

Name:  ORIGINAL METHOD - 02.JPG
Views: 5
Size:  129.4 KB  

__________________
"Failure Is Not An Option . . . Adapt & Overcome ! "

NAR # 26128 L2
TRIPOLI # 517 L2 ( inactive, at present )

Last edited by Ez2cDave : 11-30-2020 at 02:06 PM.
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 11:28 AM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe 1998-2020