Tha co-thaobhadh giùlan rolair snàthad le no às aonais fàinne a-staigh nan aonadan coileanta anns a bheil cupa a-muigh air a tharraing, agus fàinne a-muigh le uachdar taobh a-muigh spherical, rolair snàthad agus co-chruinneachadh cèidse agus fàinne a-staigh a ghabhas toirt air falbh. uachdar a-muigh agus fàinne taic lùbte.Mar thoradh air an sin, faodaidh iad dìoladh a dhèanamh air mì-rianan statach an axis giùlain suas gu 3 °.
Co-thaobhadh giùlan rolair snàthad: PNA, RPNA | Ainmeachadh | Meudan (mm) | Ìrean luchdaidh bunaiteach |
| Fw | D | C ±0.5 | D1 | r min. | dyn.Cr KN | stat.Cor KN |
| RPNA 15/28 | 15 | 28 | 12 | 24.5 | 0.8 | 6.9 | 7.9 |
| RPNA 18/32 | 18 | 32 | 16 | 27 | 1.8 | 12.5 | 16.2 |
| RPNA 20/35 | 20 | 35 | 16 | 30.5 | 2.8 | 13 | 17.5 |
| RPNA 25/42 | 25 | 42 | 20 | 36.5 | 3.8 | 18.8 | 30.5 |
| RPNA 28/44 | 28 | 44 | 20 | 38.5 | 4.8 | 22 | 34 |
| RPNA 30/47 | 30 | 47 | 20 | 42 | 5.8 | 22.6 | 36 |
| RPNA 35/52 | 35 | 52 | 20 | 47.5 | 6.8 | 24.3 | 41.5 |
| RPNA 40/55 | 40 | 55 | 20 | 50.5 | 7.8 | 26 | 47 |
| RPNA 45/62 | 45 | 62 | 20 | 58 | 8.8 | 27.5 | 53 |
| Ainmeachadh | Meudan (mm) | Ìrean luchdaidh bunaiteach |
| d | F | D | C ±0.5 | B | D1 | r min. | r1 mionaid. | s min. | dyn.Cr KN | stat.Cor KN |
| PNA 12/28 | 12 | 15 | 28 | 12 | 12 | 24.5 | 0.8 | 0.3 | 0.5 | 6.9 | 7.9 |
| PNA 15/32 | 15 | 18 | 32 | 16 | 16 | 27 | 0.8 | 0.3 | 0.5 | 12.5 | 16.2 |
| PNA 17/35 | 17 | 20 | 35 | 16 | 16 | 30.5 | 0.8 | 0.3 | 0.5 | 13 | 17.5 |
| PNA 20/42 | 20 | 25 | 42 | 20 | 20 | 36.5 | 0.8 | 0.3 | 0.5 | 18.8 | 30.5 |
| PNA 22/44 | 22 | 28 | 44 | 20 | 20 | 38.5 | 0.8 | 0.3 | 0.5 | 22 | 34 |
| PNA 25/47 | 25 | 30 | 47 | 20 | 20 | 42 | 0.8 | 0.3 | 0.5 | 22.6 | 36 |
| PNA 30/52 | 30 | 35 | 52 | 20 | 20 | 47.5 | 0.8 | 0.3 | 0.5 | 24.3 | 41.5 |
| PNA 35/55 | 35 | 40 | 55 | 20 | 20 | 50.5 | 0.8 | 0.3 | 0.5 | 26 | 47 |
| PNA 40/62 | 40 | 45 | 62 | 20 | 20 | 58 | 0.8 | 0.3 | 0.5 | 27.5 | 53 |
