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
  #31  
Old 11-20-2013, 06:25 AM
gpoehlein's Avatar
gpoehlein gpoehlein is offline
Paper Rocketeer
 
Join Date: Mar 2005
Location: Evansville, Indiana
Posts: 1,181
Default

Got to go to work now, but I'll look at the files this evening. I did a direct scale-up on the model all at the same time, so I'm not sure what is wrong.
__________________
Greg Poehlein

Member of Launch Crue - http://launchcrue.org/

Hint #1: Do not use magician's flash paper for recovery wadding!

Hint #2: Clean your shoes after flyin' in that cow pasture - that ain't no dirt clod on the sole!
Reply With Quote
  #32  
Old 11-20-2013, 07:00 AM
gpoehlein's Avatar
gpoehlein gpoehlein is offline
Paper Rocketeer
 
Join Date: Mar 2005
Location: Evansville, Indiana
Posts: 1,181
Default

Got a chance to look at the files - they should be OK - they are direct upscales of the original parts file I posted before, so if the original sized versions worked, these should. I remastered them to add a 1" square on each page, so here is the revised version.
Attached Files
File Type: pdf BT 60 upscale p1.pdf (260.6 KB, 60 views)
File Type: pdf BT 60 upscale p2.pdf (269.0 KB, 52 views)
File Type: pdf BT 60 upscale p3.pdf (289.6 KB, 48 views)
__________________
Greg Poehlein

Member of Launch Crue - http://launchcrue.org/

Hint #1: Do not use magician's flash paper for recovery wadding!

Hint #2: Clean your shoes after flyin' in that cow pasture - that ain't no dirt clod on the sole!
Reply With Quote
  #33  
Old 11-20-2013, 03:51 PM
K'Tesh's Avatar
K'Tesh K'Tesh is offline
Seagulls Beware...
 
Join Date: Apr 2013
Location: Subject to Change
Posts: 930
Default

Quote:
Originally Posted by gpoehlein
Got a chance to look at the files - they should be OK - they are direct upscales of the original parts file I posted before, so if the original sized versions worked, these should. I remastered them to add a 1" square on each page, so here is the revised version.


Yeah, those were the ones I printed that didn't work. One thing though that may have played a factor in the problem was that I wanted the red to be redder (R255, G0, B0) and the blue to be bluer (R0, G0, B255). So, I manipulated the images before printing. I doubt that this changed the size of the images though because I wasn't playing with anything that resized the images.

Thanks for adding the 1" square, now I can be certain if they are the right scale.

Now, all I need is a color printer and time (and money, and...) I got the nose cone I'm thinking about using on this build from Semroc already.

Thanks again,
Jim
__________________
.
.

Dreaming of making the rockets I dreamed of as a kid (and then some).

"The Guide says there is an art to flying", said Ford, "or rather a knack."
"The knack lies in learning how to throw yourself at the ground and miss."


Launching is Optional... Landing? That Depends on Trees.

Last edited by K'Tesh : 11-20-2013 at 04:11 PM.
Reply With Quote
  #34  
Old 10-03-2014, 07:07 AM
aeppel_cpm aeppel_cpm is offline
Ciderwright
 
Join Date: Apr 2013
Location: Burlington, WI
Posts: 633
Default

Final flight of my BT60 scale Hummingbird. Had about 4 flights total. Two nice, two ground scrapers. This past one was hard enough to do real damage. I'll patch her up enough to look good on the shelf.

This was at Bong on a C6-5. Filmed at 240fps.

http://youtu.be/bwKudMoTEMs
__________________
Charles McGonegal
Ciderwright
AEppelTreow Winery & Distillery
Ad Astra Tabernamque!
Reply With Quote
  #35  
Old 11-11-2022, 12:47 AM
blackshire's Avatar
blackshire blackshire is offline
Master Modeler
 
Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 6,507
Default

Quote:
Originally Posted by Earl
Nicely done clone patterns!

I had (have) a vintage Hummingbird from back in the 70s. It was a decent flyer back in it's day, but never put in any 'long' glides at all. Occasionally, it would do the ol' power loop into the ground bit (once or twice I recall), but no damage (flew in an old farm field at the time and the dirt was kinda soft).

The trim tab on the back horizontal stab should help with keeping the nose up some during glide, but I think bending that tab up too much for a better glide sometimes is what would make it tend to loop over under power.

So, I'm not sure you can really expect any super-great glide times out of it. Possibly a balsa nosed version might be a bit of better glider, what with a little less weight up front after engine ejection.

Let us know how the built version turns out and what kind of glides you get out it.

Earl
Seconded! The original Centuri Hummingbird used 18 mm motors, and the instructions (see: https://plans.rocketshoppe.com/cent...F-2/cenKF-2.htm ) included a tip for making the spent motor case streamer-lowered, to make the model "Contest Kosher/Halal." Also:

Since its recommended motors were the 1/2A6-2 and the A5-2, 100% scale Hummingbird clones could use 13 mm mini motors, held in a streamer-recovered motor adapter mount. If the motor adapter mount used a BT-5 motor mount tube (glued into a paper discs [or stage coupler]-type adapter), the BT-5 could be glued into it off-center (like the larger off-center motor mount used in the Centuri Space Shuttle [see: https://www.spacemodeling.org/jimz/kc-6.htm ] and the Semroc reproduction of it), and:

Using such an off-center mini motor adapter mount--combined with an appropriately-angled launch rod, if desired or needed--would allow the Hummingbird's boost to be programmed, so that its elevator need not "catch" the edge of the motor's exhaust plume. Plus, the 13 mm mini motor's narrower--than an 18 mm motor's--exhaust plume would be less likely to "brush" the Hummingbird's elevator in the first place.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR
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 07:40 AM.


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