My FEELING is that having washed out tips on a VP prop will help to give
some useful thrust when most of the prop is stalled out. The only model I
fly this way is F1M. For low ceilings my starting high pitch has the blades
almost parallel to the motor stick. For non-VP classes I don't know enough
about aerodynamics to have an opinion.
On Wed, Mar 16, 2016 at 7:15 PM, 'John Barker' john.barker783_at_ntlworld.com
[Indoor_Construction] <Indoor_Construction_at_yahoogroups.com> wrote:
>
>
> Vladimir,
>
> Personally I have not seen any PROOF that any propeller works better with
> washout and I have studied any information on propeller design that came my
> way for as long as I can remember. Of course, since about the middle of
> last century, quite a few rubber duration flyers had the idea that if the
> tips were washed out and the model nosed up too steeply towards a stall
> then the tips would continue to give some thrust and lessen the severity of
> the stall. I think eventually that most flyers realised that careful
> trimming was a better solution.
>
> John Barker - England
>
>
>
> *From:* Indoor_Construction_at_yahoogroups.com [mailto:
> Indoor_Construction_at_yahoogroups.com]
> *Sent:* 16 March 2016 22:10
> *To:* Indoor_Construction_at_yahoogroups.com
> *Subject:* [Indoor_Construction] Ama clases props
>
>
>
>
>
> Dear all,
> It has proven that in F1D props with washout eg dumping pitch in the last
> 30-40 percent of the prop does give a definite advantage. Has anyone
> experimented applying this to AMA clases like EZB, open and ltd pennyplane,
> manhattan, etc. any comparative data and flight/performance thoughts are
> well appreciated
> Vladimir Linardic
>
>
>
Received on Wed Mar 16 2016 - 16:36:29 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:48 CET