I've been flying HLS for the past 3 years and I don't see any point in going above the 1.5 ratio Don mentions. My models weighed 1.3 - 1.4g and I tried to keep the rubber to a 2g max. all the time.
With 60 minutes, there's a lot of dependance on the site that you are flying rather than rubber weight,,
--- In Indoor_Construction_at_yahoogroups.com, "Don DeLoach" <ddeloach@...> wrote:
>
> Great synopsis by Don S. That last 25-30% of rubber weight contributes
> almost nothing to theoretical duration.
>
>
>
> Don D
>
>
>
> _____
>
> From: Indoor_Construction_at_yahoogroups.com
> [mailto:Indoor_Construction_at_yahoogroups.com] On Behalf Of Don Slusarczyk
> Sent: Saturday, March 06, 2010 9:45 AM
> To: Indoor_Construction_at_yahoogroups.com
> Subject: Re: [Indoor_Construction] Re: Optimum Rubber
>
>
>
>
>
> 2:1 works out mathematically but if you graph the relationship out you
> will find that above ~1.4 to 1.5 to 1 the difference is off only by
> about 2% of the theoretical maximum of the 2:1 ratio. Coincidentally
> if you look at many 65cm rule F1Ds you find the rubber weight used then
> was in the 1.4-1.5 gram range. Going above 1.5 to 1 generally is not
> possible as the strength of the model can not handle a fully wound motor
> of such weight. Imagine a 2.4 gram motor on a 1.2 gram F1D wound to
> capacity. However some events do not follow this rule at all, LPP and
> F1L are the first two which come to mind. LPP likes below 1:1 which may
> be a result of the 12" prop limitation and 10" motor stick limitation.
> F1L seems to like 1:1 possibly due to the motorsticks being somewhat
> limited in length due to structural reasons. So it is not a steady rule
> for all events.
>
> Don
>
Received on Sat Mar 06 2010 - 20:15:06 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:46 CET