Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > Work Bench > Projects
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 02-24-2017, 01:09 PM
jeffyjeep's Avatar
jeffyjeep jeffyjeep is offline
Old Submariner
 
Join Date: Jan 2009
Location: Home of Wayne & Garth
Posts: 7,760
Default Semroc Heli Roctor build

I haven't done a long-winded, unctuous, pun-laden, alcohol-infused build thread in a long time, so now that I'm back from Point Of Rocks, WY, it's time to build the:

Semroc #CV-02 Heli Roctor

All parts are accounted for and are in perfect condition. The kit includes (not only) the smallest curtain hooks I've ever seen, but also (3) (what appear to be) RC airplane control surface hinges.

Should be different and fun!

TBC
Attached Thumbnails
Click image for larger version

Name:  IMG_0097.JPG
Views: 71
Size:  80.7 KB  Click image for larger version

Name:  IMG_0098.JPG
Views: 26
Size:  57.9 KB  Click image for larger version

Name:  IMG_0099.JPG
Views: 33
Size:  78.3 KB  Click image for larger version

Name:  IMG_0101.JPG
Views: 40
Size:  49.1 KB  Click image for larger version

Name:  IMG_0100.JPG
Views: 29
Size:  41.7 KB  
__________________
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
  #2  
Old 02-24-2017, 02:02 PM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Nunya Bizznuss, Michigan
Posts: 13,443
Default

Yep. Those are standard DU-BRO control surface hinges.
Few in R/C still use those though.
Most that still build (and ARF manufacturers) now use CA glued "EZ Hinges" that are just faster to complete and just as long-lasting hinge method.
__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL
, if you have to ask what is "NORMAL" , you probably aren't !

Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !
Reply With Quote
  #3  
Old 02-24-2017, 03:06 PM
jeffyjeep's Avatar
jeffyjeep jeffyjeep is offline
Old Submariner
 
Join Date: Jan 2009
Location: Home of Wayne & Garth
Posts: 7,760
Default

To prepare the nose cone for use, I insert it into a scrap piece of BT-5 and then give it a wash of diluted wood filler. I'll sand it smooth after the wood filler has dried.

Now for some boring crap about knots!

The instruction say to use (3) square knots for this, but it would look like the last photo. (maybe he meant 3 overhand knots.)

Instead, I'll attach the Kevlar cord to the JT-5 coupler with a single bowline knot (second photo.) It uses very little cord and won't loosen. If you don't know how to make a bowline knot, consult your Bluejackets Manual or go on line. Everything is on line and it's ALL true!

TBC
Attached Thumbnails
Click image for larger version

Name:  IMG_0104.JPG
Views: 46
Size:  44.5 KB  Click image for larger version

Name:  IMG_0103.JPG
Views: 46
Size:  38.3 KB  Click image for larger version

Name:  IMG_0102.JPG
Views: 39
Size:  50.8 KB  
__________________
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
  #4  
Old 02-24-2017, 04:12 PM
jeffyjeep's Avatar
jeffyjeep jeffyjeep is offline
Old Submariner
 
Join Date: Jan 2009
Location: Home of Wayne & Garth
Posts: 7,760
Default

The fin can assembly is together and awaiting fillets.

To set the dihedral(?) of the rotor blades a jig is provided. I rarely use thick CA for anything, but I think in this case it's warranted and I run a bead of it down the seam, smooth it out, and then hit it with a shot of accelerator.

TBC
Attached Thumbnails
Click image for larger version

Name:  IMG_0106.JPG
Views: 44
Size:  61.9 KB  Click image for larger version

Name:  IMG_0105.JPG
Views: 46
Size:  61.7 KB  
__________________
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
  #5  
Old 02-24-2017, 04:26 PM
chrism chrism is offline
Master Modeler
 
Join Date: May 2008
Location: Greenville, PA
Posts: 1,291
Default

I'll be watching this thread!
Reply With Quote
  #6  
Old 02-25-2017, 10:51 AM
jeffyjeep's Avatar
jeffyjeep jeffyjeep is offline
Old Submariner
 
Join Date: Jan 2009
Location: Home of Wayne & Garth
Posts: 7,760
Default

A lazy day today. Weather has tanked.

The rotor blades are assembled and the dihedral(?) angle of each is set. I've CA'd the hinges onto the back side of each blade and shot each with accelerator. I tugged each hinge to make they were on tight.

Now for some technique (stop rolling your eyes--this one is actually useful)
The hinges absolutely CANNOT be allowed to fail, so to add security to each--without adding much weight--I apply a tiny dot of 30 minute epoxy to each of the (6) holes on each hinge using a bamboo cooking skewer. The long cure time of the epoxy will allow it to seep down to the wood and act as a rivet.

OK, the long-winded "now for some technique" crapola is over. You can wake up now.

TBC
Attached Thumbnails
Click image for larger version

Name:  IMG_0107.JPG
Views: 28
Size:  64.6 KB  Click image for larger version

Name:  IMG_0108.JPG
Views: 36
Size:  56.2 KB  Click image for larger version

Name:  IMG_0109.JPG
Views: 31
Size:  47.3 KB  
__________________
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 02-25-2017, 11:31 AM
LeeR's Avatar
LeeR LeeR is offline
Retired with Way Too Many Kits
 
Join Date: Jun 2007
Location: Colorado
Posts: 3,222
Default

Fascinating build. I found the technique for securing the hinges to be quite riveting.
__________________
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
  #8  
Old 02-25-2017, 11:56 AM
jeffyjeep's Avatar
jeffyjeep jeffyjeep is offline
Old Submariner
 
Join Date: Jan 2009
Location: Home of Wayne & Garth
Posts: 7,760
Default

Quote:
Originally Posted by LeeR
Fascinating build. I found the technique for securing the hinges to be quite riveting.


I guess you might say the idea just popped into my head.

After all, I did grow up near Ann.....


.....wait for it.....


.....wait for it.....


.....wait for it.....


.....wait for it.....


.....Arbor.
__________________
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
  #9  
Old 02-25-2017, 12:06 PM
jeffyjeep's Avatar
jeffyjeep jeffyjeep is offline
Old Submariner
 
Join Date: Jan 2009
Location: Home of Wayne & Garth
Posts: 7,760
Default

This next technique may or may not work, so I first make a copy of the cardstock rotor hinge mount.

It's not that I don't trust the cardstock rotor hinge mount, well, actually, I DON'T trust the cardstock rotor hinge mount, so I'll try reinforcing it with sheet styrene.

I first spray the back of the cardstock rotor hinge mount (I'll now refer to it as the CRHM) with 3M Super 77 spray adhesive and lay it onto a piece of .010" thick sheet styrene. The .010" thick styrene won't crack when it's creased like .020" will.

I then cut out the styrene-backed CRHM and make the folds.

"The Vixen" has informed me that my lunch is ready.

TBC
Attached Thumbnails
Click image for larger version

Name:  IMG_0111.JPG
Views: 23
Size:  38.2 KB  Click image for larger version

Name:  IMG_0112.JPG
Views: 35
Size:  51.8 KB  
__________________
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
  #10  
Old 02-25-2017, 12:25 PM
jeffyjeep's Avatar
jeffyjeep jeffyjeep is offline
Old Submariner
 
Join Date: Jan 2009
Location: Home of Wayne & Garth
Posts: 7,760
Default

The next step is to attach the rotors to the CRHM. If I'm going to paint or color the rotors it would be best to do it before attaching them.

TBC
__________________
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
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 04:24 AM.


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