Re: Steering rig, VP hinge stiffness

From: dennisatyson <ddtyson_at_peoplepc.com>
Date: Tue, 17 Aug 2010 16:37:47 -0000

Hi Tapio,
It was a pleasure being neighbors for the week in Belgrade. I feel like I had a masters class in VP adjusting at this event and am only beginning to understand everything that I experienced. I had to make two major adjustments during the Dorcol Cup, and please consider that I am not yet up to the level of most of the people there. I first had to lower my low pitch so that I had a higher rpm in cruise mode. This was observed by Ben and I on Tregers flights. This initiated a bit of a second climb. Then I had to adjust the pre-load to stay in high pitch longer so that the plane would reach max height, descend a little, switch over to low pitch and then climb back to the max height. Also, everytime I had to steer before the prop changed over, it actually forced the changeover during the steer.
I hope you got your Ambroid home safely:)

Dennis

--- In Indoor_Construction_at_yahoogroups.com, Tapio Linkosalo <tapio.linkosalo@...> wrote:
>
>
> First of all, greetings from Belgrade. It was great to meet again many
> old friends, and make a number of new, I will not start listing names as
> I would skip someone and then would need to be ashamed.... Anyway, the
> contest was hot and tough, I did not do so good, but I think I learned a
> lot, so now I have lots of homework to do.
>
> Two questions raised:
> - what sort of line would be good for the steering balloon? I had a foam
> rod between the balloon and the line, but the line that I used was quite
> thin monofilament. For fine handling it was not too pleasant, but I feel
> that some braided stuff would feel more comfy for the fingers. But
> should it be elastic (like dacron), or as stout as possible (dyneema)?
> Is it getter to have a tight contact with the balloon, or line that can
> dampen some impulses? Further: I had glued some thin dyneema within the
> foam rod to take the load, but my thinned contact glue did hot hold the
> line in the slot, any suggestions for a good glue for this application.
>
> - another question rises from two observations. First, on my best flight
> my model reached top height, then descended maybe 5 meters rather
> rapidly before settling down to much better cruise. Also I heard
> reported that on some steers, mr. Tregers model actually started
> climbing after the steer. A common explanation for both these event
> could be, if the prop hinges were "holding" a little, in the same manner
> as you need to tap the mechanical barometer to see if air pressure is
> changing; for my flight the prop may have "jumped" to the better
> setting, and for Treger the steering might have bumped the prop to lower
> pitch? Does this happen in F1D, or does the rubber unknotting give
> enough "tapping" to make the hinges move freely?
>
>
>
> -Tapio-
>
Received on Tue Aug 17 2010 - 09:41:24 CEST