Top » Catalog » Variometer » 1369 Log In  |  Create an Account  |  Bank account  |  Shipping & Returns  |  Conditions of Use  |  Contact Us  |  Cart Contents  |  Checkout   
Quick Find  

- [Advanced Search]

- Index of contents !!!

- All products
Charter - EB 29 DR (DD)  
Shipping & Returns
Conditions of Use
Contact Us
Privacy Notice
Variometer Winter 57mm
 € 588,00/pcs 
(incl. 20% VAT)  


- Indication range: +/- 5 m/sec.
- Scale increments: 1 m
- Time constant: 3,0 (5StVM5) or 1,8 (5StVM5"S") sec

- Diameter: 57 mm
- Mounting depth: 62 mm
- weight: 0,340 kg

- incl. Expansion tank 0,45l (5StVM5) or 0,9l (5StVM5"S")

Variometers measure the rate of change of altitude by detecting the change in air pressure (static pressure) as altitude changes. They consist of a cylindrical chamber with a precisely fitting diaphragm that is placed shockproof on hollow stones and kept in its centered position by a spiral spring. The chamber is divided into two parts by the diaphragm. One is connected to static pressure, the other to an expansion tank where a package of air is kept isolated from temperature influence. Pressure differences are equalised through the thin gap between cylinder walls and the diaphragm. When descending or climbing the static pressure changes and subsequently a pressure difference between the two parts of the cylinder is building up. The degree of diaphragm movement caused by the pressure difference is the measure for vertical speed and is transferred to the instrument’s pointer. One of the main criteria of mechanical variometers is the indication velocity. In competition gliding quickly indicating variometers are a great advantage to identify thermals and use them in the best way possible.

As unit of indicating velocity the time constant is used. It defines the amount of time the device needs to reach 65% of the final value after a sudden change in vertical speed. The faster a variometer indicates the change, the smaller it’s time constant. Mechanical variometers with a large indicating range, e.g. 5 StV 5 (±10 m/sec. and ±15 m/sec.) have small time constants. To achieve fast indications with common ±5meter/seond devices the volume of the expansion tank has to be increased.

The variometer may be equipped with a scale ring.






Further information and versions (prices on request)[Here]

MacCready-Ring: with Ring (+€ 80,40)
without Ring
Response time: 1,8 sec (+€ 18,00)
3,0 sec

This product was added to our catalog on Monday 25 June, 2007.
Customers who bought this product also purchased
AIR Control Licenses
AIR Control Licenses
FLARM Stabantenne DD1
FLARM Stabantenne DD1
AIR Control & VT-01 Transponder
AIR Control & VT-01 Transponder
EDS O2D1-2G Set1 with 2l Alu-Cylinder
EDS O2D1-2G Set1 with 2l Alu-Cylinder
One Man Rigging Aid Arcus
One Man Rigging Aid Arcus
Power Charger AIRBATT 2641 2A Duo LiFePO4
Power Charger AIRBATT 2641 2A Duo LiFePO4
LX Bridge 232
LX Bridge 232
LiFePO4 Airbatt 10Ah
LiFePO4 Airbatt 10Ah
Shopping Cart more 
0 items
Deutsch Englisch Czech
Manufacturer Info  
Other products
What's New? more 
Valve extension 4cm
Valve extension 4cm
€ 5,00/pcs
Specials more 
8.33 kHz - f.u.n.k.e. ATR833S
8.33 kHz - f.u.n.k.e. ATR833S
€ 1.199,00/pcs
€ 1.079,00/pcs
  3M  ACK  AeroStar  AirAvionics - Butterfly  airbatt  AL-KO  ASA  Becker Avionic Systems  
 Beringer  BGS  Bosch  Boxwave  BWS Pirker & Storka  Castrol  Cleveland  Clouddancers  
 CTEK  Design 4 Pilots  deuter  DITTEL Avionik  DOLBA & DOLBA  Duracell  e-t-a  einszett  
 esa-systems  f.u.n.k.e. Avionics  FLARM  freytag&berndt  Gadringer-Gurte GmbH  Garmin  Hermesdorf  HPH Sailplanes  
 HR Richter  ICOM  IMI Gliding  Innotec  interieur  Kannad  Klixon  Liqui Moly Aero  
 LX NAV  LX Navigation  MecaPlex  MMM Software  Molykote  Mountain High  National Parachute  navITer  
 Nitto  NOVUS  Panasonic  Revell  Rogers Data  Sage Variometers  Shell  soaringXX  
 Sonnenschein  Spekon  Spot LLC  Tesa  Thermikwolke  Tost Flugzeuggerätebau  TQ  
 Trig  VDO  Walther Präzision  Winter  Wurmi