stunthanger.com

Electric Stunt => Gettin all AMP'ed up! => Topic started by: paul winter on February 23, 2013, 07:36:01 AM

Title: props
Post by: paul winter on February 23, 2013, 07:36:01 AM
i have been flying electric now for 6 months and love it
but never happy with overhead line tension with my planes
i have tried leadout rake ,tip weight ,thrust on my motor and non of them have really helped
but i decided to try a different prop
a normal 11x5.25 brian eather carbon prop ,and all the armchair experts said it would use to much battery
i must prove them wrong as i have 21% left with both props
also the 3 bladed prop has cured all my line tension problems
paul
Title: Re: props
Post by: john e. holliday on February 23, 2013, 08:25:59 AM
As I have stated in the past, "Each airplane power combo takes different props even of the same airplane design".   I am no expert by no means, but, am willing to try things to see what helps.  But, am glad you are getting things to work.
Title: Re: props
Post by: Avaiojet on February 23, 2013, 11:13:27 AM
i have been flying electric now for 6 months and love it
but never happy with overhead line tension with my planes
i have tried leadout rake ,tip weight ,thrust on my motor and non of them have really helped
but i decided to try a different prop
a normal 11x5.25 brian eather carbon prop ,and all the armchair experts said it would use to much battery
i must prove them wrong as i have 21% left with both props
also the 3 bladed prop has cured all my line tension problems
paul

Paul,

Nice to know that 3 blade prop is working out for you. Especially a CF 3 blade prop.

Kudos also for your experimentation.  H^^

Exactly what CF prop are you using and from what Vendor?

Thanks for posting your success!

Charles

Title: Re: props
Post by: John Cralley on February 23, 2013, 01:49:10 PM
Here is the link for the carbon fiber three blade prop:

http://flystunt.com/download/INT%20-%20World%20Catalogue%20-%20Dec.%2008.pdf (http://flystunt.com/download/INT%20-%20World%20Catalogue%20-%20Dec.%2008.pdf)

They do NOT come cheap!  y1  HB~>
Title: Re: props
Post by: Dennis Adamisin on February 23, 2013, 01:52:46 PM
i have been flying electric now for 6 months and love it
but never happy with overhead line tension with my planes
i have tried leadout rake ,tip weight ,thrust on my motor and non of them have really helped
but i decided to try a different prop
a normal 11x5.25 brian eather carbon prop ,and all the armchair experts said it would use to much battery
i must prove them wrong as i have 21% left with both props
also the 3 bladed prop has cured all my line tension problems
paul

Terrific!  Can you fill in the blanks a little, what other props did you try at what RPM's?  Airplane size & weight?  Like Doc said every bird has its own sweet spot...
Title: Re: props
Post by: paul winter on February 24, 2013, 03:52:21 AM
hi all
time to fill in the blanks

the model is my own design but it basically a strega with a cardinal 92 wing

power is a 3825 750 os motor
esc is ice lite 50
timer fm9 r
battery hobby king 5s 3000
retracts eflight  10-15

weight 54 ounces

line 15x66
handle an old Joe reinhart

prop Brian Eather 11x5.25 flat back blue square tip 3 bladed carbon fibre

ground revs 9250
lap time 5.3
flight time 5.35
paul




Title: Re: props
Post by: Dean Pappas on February 24, 2013, 01:38:49 PM
Hi Paul,
Glad things are working well ... now if only there was a pusher version of that same prop.

take care,
  Dean P.