EN
EUR

Forces in guy ropes

The calculator counts the forces exerted by the wind which influence the guywire and the mast itself. It is possible to enter the „area” of an antenna either in numerical value or you can enter the number of elements and their diameters. You can also choose a typical antenna from the template. In the end, you will be provided with results which take into consideration different directions of effecting wind and the alternatives of anchoring in three or four different directions. We have to make sure that you know that in this case we really take only the forces exerted by the wind into account in such calculations – as a matter of fact the weight of an antenna and the construction as a whole also impact the stability of masts. The frost is not taken into account as well, however, the frost can cause even two times larger area of the antenna exposed to the wind, in extreme conditions even up to three times more than original area. Moreover, the frost makes the whole construction heavier.


m
m
m2
m
mm
If you wish, you can leave here your call sign, just to let us know. Its optional.

News

  • Strength of P4 and P5 26. 4. 2018

    We are updating the ratings for Breaking Strength and Safe Working Load for our most popular rope, 4mm and 5mm Mastrant-P. We began improving the construction of this rope in our production process more than 6 years ago and have been testing samples from each run. We are now satisfied that the changes have resulted in consistent, permanent improvements. Here are the new ratings:
    Mastrant-P, 4 mm: BS=440 daN (about 440 kg, 970 lb.), SWL=132 daN (about 132 kg, 290 lb.)
    Mastrant-P, 5 mm: BS=540 daN (about 540 kg, 1190 lb.), SWL=162 daN (about 162 kg, 360 lb.)

     
  • Orders of customers from USA and Canada 6. 3. 2018

    If you are considering placing an order and you want to save money on shipping, please place an order no later than March 11 in our on-line shop. You can pick it up in our booth 3607 at the Dayton Hamvention (choose “Personal pickup at fair”) or we will ship it directly to you from the US (choose “Dayton shipping”). Shipping from Dayton is free for orders over $199 (to US), and shipping costs for smaller orders will reflect the cost of shipping from Ohio.

     
  • Thread Rods 17. 11. 2017

    We have added to our assortment (hardware section) very useful material for all who build their antennas yourself. It is stainless steel (AISI 316 - A4) thread rods 1 m long in sizes M5 to M12. 

     
Read more