International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B5. Istanbul 2004 
  
monitor, which RC Helicopter is mounting camera on the 
gimbal that is able to maintain vertical condition without 
regard to the body of a light helicopter controlled by radio 
and the vibration or a rolling of it. 
When helicopter, which people get on board to handle 
directly, cant fly in a difficultly approachable spot or within 
an area of a narrow width, or for a mountainous area such as 
gorge that is difficult for people to approach, it is possible to 
be reasonably taken a close photograph by RC Helicopter, as 
RC Helicopter photogrammetry system is controlled by an 
advanced technology of RC Helicopter and an earthly 
monitor as shown by Table 1. The manned helicopter leads to 
a skilled training of controller, a high cost of itself and a high 
cost for boarding. On the other hand, as RC Helicopter can be 
directly controlled through a low cost of itself and a short 
training, it is excellent in aspects such as economy, mobility 
and rapidity. 
Table 1. The analysis according to conditions 
  
  
  
  
  
  
ethod | RC RC |Hot-air Balloon Air- | Long | Aluminium 
Clause Airplane |HelicopterjBalloon ship |Tripod| Tower 
Manufacture, D D D A E A B 
degree 
IC onstructian C B D À E B C 
expense 
Maintenance A A B C E A A 
expense 
Movement A A B A D A C 
and Approach 
Control C B D B A A B 
  
  
  
  
  
  
  
  
  
  
Also, by maintaining flight altitude to about 200 meter 
(visibility range) from the earth, RC Helicopter can take a 
photograph of a dynamic and static image of the wanted 
object - the selection of sites such as house, apartment and 
factory, the whole view of buildings such as school and factor, 
the progress of public works such as roads, harbors and 
bridges, the news of the press and broadcasting station, film, 
the other air photo such as advertising by airship -- with 
cameras such as Still, Digital, Digital Video and general 
Video in the industry field. 
As RC Helicopter of these features can make a flight such 
as a hovering, a vertical descent and nose-dive, a moving 
forward and backward, and a flank without any change of the 
body, it can directly fly from a spatial point to other point. 
Accordingly, alike an airliner and a fighter that the wing is 
fixed, RC Helicopter can make a flight such as a vertical 
taking-off and landing in where a roomy airstrip is 
unnecessary as Figure 1. 
  
Figure 1. Property of RC Airplane and RC Helicopter in 
flight 
Also, when an engine is out of order, it can safely land on 
the earth by using the auto rotation on the body based on the 
proper control procedure of controller. RC Helicopter 
examined by this study used EAGLE 90 of HIROBO Co, the 
figure and the various factors is as Figure 2 and Table 2, 
respectively. 
   
  
  
   
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ee 
Figure 2. Model of RC Helicopter 
  
  
  
  
  
  
  
  
  
  
  
  
Table 2. Specifications of RC Helicopter 
Name HIROBO & EAGLE 90 
Length 1400 mm 
Hight 470 mm 
Width 250 mm 
pd 1500 mm 
Tail roter diameter 270 mm 
Gear ratio 93-1.3 
Maximum payload 8500 g 
weight UE 
Mem 200m(depends on flight conditions) 
Endurance approximate 20 minutes 
Tvpical photogrammetry, surveying, cartography, 
A Em iis archeology, environmental protection, arhitecture, 
PP > civil engineering, marketing 
  
  
  
According to Figure 2 and Table 2, RC Helicopter, which 
is made into the light and solid material of high-intensity, 
propel a main and tail roter with a glow engine (15cc), and is 
equipped with the capacity of fuel that can fly for about 
twenty minutes. The skilled controller can handle flight 
altitude in space from the earth to about 200 meters with 
radio as occasion demands. 
According to Figure 3, the set-up part of camera, which is 
made up of the iron part of the taking-off and landing, can 
load cameras such as miniature (35mm), medium (6x4.5cm), 
Panorama (6x12cm), DV (6mm 3CCD), 35mm film movie 
and digital video (CCD: charge coupled device). 
This set-up part, which can adjust an angle of axis by the 
radio control, is designed for a gimbal. A gimbal is a buffer 
that can absorb noises and vibration. In addition, this study 
designed a CCD digital video camera and video transmitter to 
show images taken a photograph on flights way through 
connection with the earth monitor at real time. 
   
   
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