Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > The Golden Age of Model Rocketry > Model Rocket History
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 03-26-2018, 12:41 AM
A Fish Named Wallyum's Avatar
A Fish Named Wallyum A Fish Named Wallyum is online now
BP Mafia
 
Join Date: Mar 2005
Location: Ft. Thomas, KY
Posts: 6,871
Default Interesting Centuri Mach 10 on Ebay

https://www.ebay.com/itm/VINTAGE-CE...CwAAOSwE~lasu-i
If you've ever built one, you'll likely notice the oddly straight wings right off the bat. I'd be interested to see how this one glides, but not $60 interested.
__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I was SAM 0058

On the build floor: Estes R2D2, Centuri Stellar Hercules, Semroc SLS Scorpion, Semroc Squire, RDC V-Max, Estes World Federation Star Probe

Ready to fly: Enerjet 1340/20 Sounding Rocket, Estes Super Neon XL, Estes Astron Farside X, FSI Eos, FRW Magnum Spartan, Centuri Stellar StarLifter
Reply With Quote
  #2  
Old 03-26-2018, 03:00 PM
BEC's Avatar
BEC BEC is offline
Master Modeler
 
Join Date: Feb 2009
Location: Auburn, Washington
Posts: 2,265
Default

Bill, he's selling the kit, not the built model...so you can set the wings they way you want (well, except for the price).
__________________
Bernard Cawley
NAR 89040 L1 - Life Member
SAM 0061
AMA 42160
KG7AIE
Reply With Quote
  #3  
Old 03-26-2018, 07:52 PM
A Fish Named Wallyum's Avatar
A Fish Named Wallyum A Fish Named Wallyum is online now
BP Mafia
 
Join Date: Mar 2005
Location: Ft. Thomas, KY
Posts: 6,871
Default

Quote:
Originally Posted by BEC
Bill, he's selling the kit, not the built model...so you can set the wings they way you want (well, except for the price).

Yes, but do the kits have wings shaped like this? I'd love to know what the performance gains/losses would be.
__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I was SAM 0058

On the build floor: Estes R2D2, Centuri Stellar Hercules, Semroc SLS Scorpion, Semroc Squire, RDC V-Max, Estes World Federation Star Probe

Ready to fly: Enerjet 1340/20 Sounding Rocket, Estes Super Neon XL, Estes Astron Farside X, FSI Eos, FRW Magnum Spartan, Centuri Stellar StarLifter
Reply With Quote
  #4  
Old 03-30-2018, 10:46 PM
rraeford rraeford is offline
Craftsman
 
Join Date: Aug 2005
Posts: 228
Default

This is a really easy and inexpensive kit to clone. I've built at least 5 of them and moved the wings forward, back and added dihedral. It boosts funny but I got it to glide fairly well. Looks like a MIG in flight.

Last edited by rraeford : 03-31-2018 at 07:14 PM.
Reply With Quote
  #5  
Old 03-31-2018, 06:36 PM
blackshire's Avatar
blackshire blackshire is offline
Master Modeler
 
Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 5,546
Default

Quote:
Originally Posted by A Fish Named Wallyum
Yes, but do the kits have wings shaped like this? I'd love to know what the performance gains/losses would be.
I see what you mean--the lower sweep angle of his Mach-10's wings should give it better glide performance. Its moderately swept wings are similar in planform to those of the BAE Systems Hawk (the U.S. version is the T-45A Goshawk, see both here: http://en.wikipedia.org/wiki/BAE_Systems_Hawk and here: http://en.wikipedia.org/wiki/McDonn...as_T-45_Goshawk ), a subsonic jet trainer, and:

Many high-performance aerobatic and slope-soaring R/C sailplanes also have moderately-swept wings. The "stock" Mach-10's wings are highly-swept, like the wings of a supersonic fighter. But while they are aesthetically pleasing, they don't produce as much lift at subsonic speeds. They can also--like long conical and ogive nose cones that are made for supersonic use--have more drag at lower speeds because they have more "wetted area" than is necessary at subsonic velocities.
__________________
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
  #6  
Old 04-13-2018, 11:08 AM
surdumil's Avatar
surdumil surdumil is offline
SAROS Past President
 
Join Date: Apr 2005
Location: Saskatoon, Saskatchewan, Canada
Posts: 58
Default

I've found that the Mach 10 is more "air brake" than "glider", really. In no way is it a performance glider. Keep the wings square-edged and unsanded so that it slows as much as possible before landing.

I cloned the Mach 10 about 18 years ago and I still fly it fairly regularly. It's a pretty tough bird, but I made sure that it's a pretty rough bird, too, so that it slows down decently as it decends. When gliding, it kinda stays oriented correctly but comes in fairly "hot". It doesn't glide so much as "fall with style". And, yup, it lands pretty hard, with an impressive bounce and tumble every time. Really fun rocket!

With rocket's forward motion, the little wedgie up on the tail produces downward thrust along the long moment arm of the vertical stab which drops the butt end down, causing the wings to tilt upwards thereby presenting lift and breaking force... a neat air-brake mechanism/demonstration.

The system becomes less effective if an airfoil is sanded into the main wing because the upward lift of the wing airfoil overpowers the force presented by the little tail wedge. So... don't airfoil the main wing!

Last edited by surdumil : 04-13-2018 at 03:33 PM.
Reply With Quote
  #7  
Old 04-14-2018, 02:34 AM
blackshire's Avatar
blackshire blackshire is offline
Master Modeler
 
Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 5,546
Default

Quote:
Originally Posted by surdumil
I've found that the Mach 10 is more "air brake" than "glider", really. In no way is it a performance glider. Keep the wings square-edged and unsanded so that it slows as much as possible before landing.

I cloned the Mach 10 about 18 years ago and I still fly it fairly regularly. It's a pretty tough bird, but I made sure that it's a pretty rough bird, too, so that it slows down decently as it decends. When gliding, it kinda stays oriented correctly but comes in fairly "hot". It doesn't glide so much as "fall with style". And, yup, it lands pretty hard, with an impressive bounce and tumble every time. Really fun rocket!

With rocket's forward motion, the little wedgie up on the tail produces downward thrust along the long moment arm of the vertical stab which drops the butt end down, causing the wings to tilt upwards thereby presenting lift and breaking force... a neat air-brake mechanism/demonstration.

The system becomes less effective if an airfoil is sanded into the main wing because the upward lift of the wing airfoil overpowers the force presented by the little tail wedge. So... don't airfoil the main wing!
I've never had or flown a Mach 10, but the YouTube videos I've seen of them flying show what you described. Like the X-24 "Bug" lifting body, the Mach 10 utilizes "angled flat plate lift" rather than airfoil lift (as the Centuri TIR-24 "Model Rocket Lifting Bodies" report shows [with a rear off-center-weighted cone] and describes, flat plate lift isn't as efficient as an airfoil, but enables a steep but safe descent). One advantage of the Mach 10 is that it makes a good "foul weather boost-glider," being steady and having good wind penetration on windy days that a high L/D boost-glider couldn't cope with.
__________________
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 08:32 PM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe 1998-2018