Control Lines For all you fly-by-wire fanatics!

299 KM/H at the BMFA Power Nats [UltraHD/4K resolution]

Reply

Old 09-27-2017, 09:46 AM
  #1  
DominicM
Thread Starter
 
DominicM's Avatar
 
Join Date: Nov 2002
Location: Hampshire, , UNITED KINGDOM
Posts: 1,796
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 299 KM/H at the BMFA Power Nats [UltraHD/4K resolution]

Wasn't aware these projectiles could get THAT quick. I guess having a race tuned two stroke, very little fuel onboard to minimise weight and one wing helps ! Filmed in UltraHD / 4K. Watch out for the super slo mo at the end...it's still fast.

DominicM is offline  
Reply With Quote
Old 09-27-2017, 07:09 PM
  #2  
downunder
 
downunder's Avatar
 
Join Date: Oct 2002
Location: Adelaide, AUSTRALIA
Posts: 4,517
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

As the commentator said after the flight, that was Paul Eisner who's been setting records for years. Not bad for a 2.5cc engine and zero nitro fuel . The single wing is used to cover as much of the lines as the rules allow because most of the drag comes from the lines, not the model.
downunder is offline  
Reply With Quote
Old 09-27-2017, 08:16 PM
  #3  
DominicM
Thread Starter
 
DominicM's Avatar
 
Join Date: Nov 2002
Location: Hampshire, , UNITED KINGDOM
Posts: 1,796
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

I wouldn't have thought about the lines causing drag. Thanks. Good to know.
DominicM is offline  
Reply With Quote
Old 09-28-2017, 08:37 AM
  #4  
grotto2
My Feedback: (2)
 
grotto2's Avatar
 
Join Date: Feb 2003
Location: Palm Bay, FL
Posts: 1,035
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Dominic-
Just as a rule of thumb, an object with a cylindrical cross section traveling through air has about ten times the drag as an airfoil shaped object of the same thickness.
So line drag is indeed very significant in C/L.
Also note that C/L planes require substantially bigger engines than similarly sized R/C planes for the same reason.
grotto2 is offline  
Reply With Quote
Old 09-29-2017, 08:31 PM
  #5  
DominicM
Thread Starter
 
DominicM's Avatar
 
Join Date: Nov 2002
Location: Hampshire, , UNITED KINGDOM
Posts: 1,796
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Thanks. I'll add that info to the vid description. Appreciate it. Cheers.
DominicM is offline  
Reply With Quote

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service