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Reply to:"Re: [Paparazzi-devel] Re: it is soooo cold outside"
From: |
Chris |
Subject: |
Reply to:"Re: [Paparazzi-devel] Re: it is soooo cold outside" |
Date: |
Sat, 04 Dec 2010 11:02:33 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.15) Gecko/20101027 Thunderbird/3.0.10 |
I went the other way :-)
Having constructed 5 airframes from gliders to delta wings but finally i
understood that
long flight time is not the same as long range.
After some tests i concluded that foam planes must be excluded as their
L/D ratio is horrible.
The foam has some properties that disrupts the air flow as it seems.
Now i have a wing loading of a brick, about 37 oz/sqf but the plane
consumes less energy
when flying at 80km/h than the Cularis needed for 50km/h
Here is some real measured data:
Cruise speed is 75-80km/h, current draw is 13,address@hidden (202w to cruise)
(it can go up to 15,5A),
stall speed is ~45km/h.
On board the plane carries a 4s3p 15Ah pack weighting ~1400g a nice
camera with X10 optical zoom
and 360 degree ratation mechanism, a 3w 2.4 ghz video transmitter, a
350g 2.5m parachute etc.
I have removed the landing gear as i take off using a bungee and land
with a parachute just to
lower the drag and use a lighter motor.
Chris
- Reply to:"Re: [Paparazzi-devel] Re: it is soooo cold outside",
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