wardog | 24 Feb 2019 2:22 p.m. PST |
guys just looking for info the su-122 carried a 122mm howitzer m1938 (m-30) could some one tell me the max range of this howitzer when mounted in this vehicle , i believe the max elevation was somewhere around 25 degrees ?? |
Herkybird  | 24 Feb 2019 5:06 p.m. PST |
It was 12.67 miles as a field gun, on a T-34 chassis it was called the ISU-122 link I assume it would then be limited to line of sight? |
Thresher01 | 24 Feb 2019 5:27 p.m. PST |
Assuming 45 degrees gets you the max distance, then 22.5 degrees will get you approximately 50% of that, so it would be 6.33 miles. |
Barries Lead Mountain | 24 Feb 2019 5:47 p.m. PST |
The SU-122 it quite a different beast than the ISU-122, different gun different role. Judging by this I would say they were used in LOS like Herky said link Later, regiments were incorporated in assault squads comprising many models, the SU-122 being posted at the rear, 200 to 600 m (219-656 yd) behind the advancing columns. |
Mobius | 24 Feb 2019 6:31 p.m. PST |
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Barin1 | 25 Feb 2019 2:57 a.m. PST |
I had an opportunity to fire live ammunition from M-30 back in 1985. Maximum firing range is 11.8 km ( ca 7.3 miles). Elevation of field M-30 is -3° to 63.5° SU-122 M-30 was designated M-30S en.wikipedia.org/wiki/SU-122 Maximum fire distance – 3 km direct fire, up to 8 km with indirect. |
Mobius | 25 Feb 2019 8:07 a.m. PST |
Interesting that the maximum range is at 55°39' not at maximum elevation.
I have doubts that the direct fire telescope was a TSh-15 as that seems to be used in later vehicles. And I don't see a direct sight opening in the mantlet. |
Barin1 | 25 Feb 2019 8:28 a.m. PST |
I don't think that a "field" M-30 has direct fire telescope – at least in normal opertaion we were not installing it on a howitzer – with D-30 I was always installing both panorama and direct fire optics in the deploy phase. Su-122 should have direct fire optics…will check Russian pages when I'm at home. |
Barin1 | 25 Feb 2019 10:24 a.m. PST |
It seems that Su-122 had the same panoramic optics as its field cousin. link |
Mobius | 25 Feb 2019 10:49 a.m. PST |
Yes, that 'Gerza' is probably similar to a PT-6 periscope sight. There is also the problem that the HE and early HEAT shells didn't have a tracer so correcting for a miss would be a problem. Wardrawings and Quartermaster sites incorrectly have a TSh-15 sight. |
Herkybird  | 03 Mar 2019 3:11 p.m. PST |
The SU-122 it quite a different beast than the ISU-122, different gun different role. Ooops, my bad! That will teach me to trust a google search! |