Re: Question for John Kagan

From: John Kagan <john_kagan_at_hotmail.com>
Date: Wed, 30 Jan 2013 05:08:32 -0000

--- In Indoor_Construction_at_yahoogroups.com, "mkirda@..." wrote:
>
> Hi John.
>
> In your January '13 Indoor column you mentioned Lutz's and Ivan's models flew with a flat-flight attitude, with a slow, flat climb and very long cruise...
> To what degree do you think Hunt's advice is still relevant? Might there be a better trimming method for us F1D newbies?
>

Hi Mike,

In my opinion, the flight profile of Treger and Schramm is a symptom of high performance, not the cause.

It is similar to prop RPM on top models. People see the low RPM and think that is what they need to focus on. The problem is that there are lots of ways to slow a prop down, but not many of them will result in increased performance.

Similarly, there are easy ways to make an F1D climb slowly, but they alone won't necessarily increase flight time.

That is why I highlighted Treger and Schramm's flight profile in my column. Not as a proposed better way to trim, but as evidence that something in their program is superior.

Also, keep in mind that a "slow, flat climb" does not mean that the model's flight attitude is flat (although in this case it was, too). It means that a graph of altitude over time (i.e. the flight profile) is flat.
Received on Tue Jan 29 2013 - 21:08:34 CET