Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


Dewoitine D.520 - Page 2 Cox_ba12




Dewoitine D.520 - Page 2 Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» .020 Throttle
by rdw777 Today at 8:52 am

» Automobiles you don't see everyday...
by robot797 Today at 8:42 am

» Found a posible rc plane for cox powered convertion
by getback Today at 8:38 am

» In search of .010 carb body retaining collet
by Ken Cook Today at 7:33 am

» Making a water-cooling coil for a Cox .049 engine
by davidll1984 Today at 6:36 am

» Enya .09 II Questions
by Surfer_kris Today at 5:55 am

» Glow plug will not glow
by Coxfledgling Today at 3:57 am

» Jim Walker Firebaby
by rsv1cox Yesterday at 4:53 pm

» Project Cox .049 r/c & Citabrian Champion
by rdw777 Yesterday at 10:32 am

» Snail type throttle
by Greenman38633 Yesterday at 9:28 am

» K&B Torpedo .19 Green Head CL Needle Valve
by Ken Cook Yesterday at 8:08 am

» Cox .35 and .40 in Nürnberg Toy Fair
by ffkiwi Yesterday at 3:52 am

Cox Engine of The Month
April-2024
OVERLORD's

"Kress ducted fan with new Cox Conquest 15 RC"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


Dewoitine D.520 - Page 2 Empty
Live on Patrol


Dewoitine D.520

Page 2 of 2 Previous  1, 2

Go down

5x5 or 6x3 prop?

Dewoitine D.520 - Page 2 Vote_lcap57%Dewoitine D.520 - Page 2 Vote_rcap 57% 
[ 4 ]
Dewoitine D.520 - Page 2 Vote_lcap43%Dewoitine D.520 - Page 2 Vote_rcap 43% 
[ 3 ]
 
Total Votes : 7
 
 
Poll closed

Dewoitine D.520 - Page 2 Empty Re: Dewoitine D.520

Post  ticomareado Sat May 25, 2019 5:30 pm

dirk gently wrote:Just some stats for ya:
Based on the pitch of the sound at the beginning of the video, the motor is doing some 15k rpm. With my 6x3 prop (actually, 5.7x3) the performance of the engine according to http://godolloairport.hu/calc/strc_eng/index.htm would be:

Static thrust = 10.93 = 0.69 pound = 0.31kg
Perimeter speed = 113.65m/s
Required engine power = 0.076HP = 0.055kW
Estimated flying speed = 42.6mph = 37.0Knots ~70km/h (not sure about this one).

Is this kind of performance reasonable for a Baby Bee?

-----------------

If that's a single port Baby Bee, that's outstanding performance.
ticomareado
ticomareado
Account Under Review

Posts : 1089
Join date : 2013-10-03
Location : NC

Back to top Go down

Dewoitine D.520 - Page 2 Empty Re: Dewoitine D.520

Post  dirk gently Fri Jun 07, 2019 1:56 pm

Someone on this forum once told me models fly better the second time, and that seems to be true for this plane, although the Baby Bee is not quite reaching the RPM it used to. Maybe it needs a cleaning or fresh fuel.



Anyhow, I got a lot of nice flights today, and attracted some interest from other flyers at the field.
dirk gently
dirk gently
Gold Member
Gold Member

Posts : 429
Join date : 2012-02-03
Age : 41
Location : Poznań

Back to top Go down

Page 2 of 2 Previous  1, 2

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum