Tomark Aero Cz Sro VIPER SD-4
20 on the U.S. register. Built from 2009 to 2025; half of them date from 2023 or earlier. Florida has the most (6). 75% are registered to companies, flight schools, clubs and other organisations; the rest to individuals, who are not named here at this time.
About the VIPER SD-4 from the FAA's model table
- Type
- Fixed-wing, single engine · Piston singles
- Power
- Four-cycle piston, 1 engine
- Common engines
- Rotax 912Uls2 (12), Rotax 912Uls Series (3), Rotax 914Uls (1)
- Seats
- 2
- Built of
- aluminium
- Maker on the register
- Tomark Aero Cz Sro
- Registered
- earliest certificate April 27, 2010; newest August 28, 2026
Where they are owner's state
Who owns them registrant type
By owner type, as a table
| aircraft | share | |
|---|---|---|
| LLC | 9 | 45% |
| Non-citizen corporation | 5 | 25% |
| Individual | 5 | 25% |
| Corporation | 1 | 5% |
Versions as the FAA records them · click one to list only those aircraft
| Version | Registered | Built | Share |
|---|---|---|---|
| VIPER SD-4 | 20 | 2009 to 2025 | 100.0% |
When they were built by decade · 3 with no year on file
Registration status
Airworthiness certificate class
By airworthiness certificate, as a table
| aircraft | share | |
|---|---|---|
| Light sport | 17 | 85% |
| None on file | 2 | 10% |
| Experimental | 1 | 5% |
Biggest operators companies, schools and clubs
Eagle International Aircraft INC5Tomark Aero USA LLC1Salt Meadow LLC1Pupa285 LLC1Piston Aviation LLC1Paige Aviation LLC1November Sky LLC1N411Ea LLC1Management Ranch LLC1International Air Services INC Trustee1Cinca Aircrafts LLC1
Largest fleets, as a table
| aircraft | |
|---|---|
| Eagle International Aircraft INC | 5 |
| Tomark Aero USA LLC | 1 |
| Salt Meadow LLC | 1 |
| Pupa285 LLC | 1 |
| Piston Aviation LLC | 1 |
| Paige Aviation LLC | 1 |
| November Sky LLC | 1 |
| N411Ea LLC | 1 |
| Management Ranch LLC | 1 |
| International Air Services INC Trustee | 1 |
| Cinca Aircrafts LLC | 1 |
Fleet pages: Eagle International Aircraft INC · Piston Aviation LLC · International Air Services INC Trustee
Accident history NTSB records · 0 cases since 1982, 0 fatal
No NTSB accident or incident records match this family's versions. Each aircraft's own page also shows its record. How models compare: Accidents by model in Aviation Analytics.
Questions people ask answers refresh every morning
How many Tomark Aero Cz Sro VIPER SD-4 aircraft are registered in the U.S.?
20 as of October 23, 2026, counting 1 version the FAA records separately.
Which state has the most Tomark Aero Cz Sro VIPER SD-4s?
Florida, with 6.
Who owns the Tomark Aero Cz Sro VIPER SD-4?
75% are registered to companies, flight schools, clubs and other organisations; the rest to individuals and co-owners, who are not named on this site at this time.
When were the Tomark Aero Cz Sro VIPER SD-4s on the register built?
Between 2009 and 2025; half of them in 2023 or earlier.
What is the Tomark Aero Cz Sro VIPER SD-4 made of?
The airframe is aluminium: sheet metal over a riveted frame, the way most aircraft have been built since the 1940s. The FAA's type certificate data sheet is the authority for any one model.
Connections how the VIPER SD-4 links to the rest of the register
Design
- Tomark Aero Cz Sro 20 aircraft on the register
- Tomark Aero Cz Sro VIPER SD-4 20 registered
- Built of aluminium
Engines
- Rotax 912ULS2 12 of these aircraft · 100 hp
- Rotax 912ULS series 3 of these aircraft · 100 hp
- Rotax 912 IS 1 of these aircraft · 100 hp
- Rotax 912S 1 of these aircraft · 100 hp
- Rotax 914ULS 1 of these aircraft · 115 hp
Where they are
- Florida 6 of these aircraft
- Wyoming 3 of these aircraft
- Delaware 3 of these aircraft
- Idaho 2 of these aircraft
- Washington 1 of these aircraft
Biggest operators
- Eagle International Aircraft INC 5 of these aircraft
- Tomark Aero USA LLC 1 of these aircraft
- Salt Meadow LLC 1 of these aircraft
- Pupa285 LLC 1 of these aircraft
- Piston Aviation LLC 1 of these aircraft
Record
- NTSB accidents and incidents involving the VIPER SD-4 0 cases since 1982 · 0 fatal
The whole map of how records connect · these connections as data: /graph/model/tomark-aero-cz-sro/viper-sd-4.json.
Aircraft newest certificates first · 20
| Tail no. | Maker and model | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|
| N651EA | Tomark Aero Cz Sro VIPER SD-4 |
Eagle International Aircraft INC Fort Lauderdale, Florida |
None on file | 2026-08-28 | ValidFAA registration status code V: Valid registration. All codes |
| N447EA | Tomark Aero Cz Sro VIPER SD-4 |
Management Ranch LLC Sheridan, Wyoming |
Light sport | 2026-08-26 | ValidFAA registration status code V: Valid registration. All codes |
| N652EA | Tomark Aero Cz Sro VIPER SD-4 |
Eagle International Aircraft INC Fort Lauderdale, Florida |
None on file | 2026-08-06 | ValidFAA registration status code V: Valid registration. All codes |
| N478EA | Tomark Aero Cz Sro VIPER SD-4 |
Individual owner Idaho |
Light sport | 2026-05-26 | ValidFAA registration status code V: Valid registration. All codes |
| N450EA | Tomark Aero Cz Sro VIPER SD-4 |
International Air Services INC Trustee Carson City, Nevada |
Light sport | 2026-05-07 | ValidFAA registration status code V: Valid registration. All codes |
| N874EA | Tomark Aero Cz Sro VIPER SD-4 |
November Sky LLC Sheridan, Wyoming |
Light sport | 2026-04-23 | ValidFAA registration status code V: Valid registration. All codes |
| N973EA | Tomark Aero Cz Sro VIPER SD-4 |
Eagle International Aircraft INC Fort Lauderdale, Florida |
Light sport | 2026-01-20 | ValidFAA registration status code V: Valid registration. All codes |
| N485EA | Tomark Aero Cz Sro VIPER SD-4 |
Pupa285 LLC Dover, Delaware |
Light sport | 2025-12-20 | ValidFAA registration status code V: Valid registration. All codes |
| N411EA | Tomark Aero Cz Sro VIPER SD-4 |
N411Ea LLC Sheridan, Wyoming |
Light sport | 2025-12-15 | ValidFAA registration status code V: Valid registration. All codes |
| N881EA | Tomark Aero Cz Sro VIPER SD-4 |
Eagle International Aircraft INC Fort Lauderdale, Florida |
Light sport | 2025-11-21 | Reports overdueFAA registration status code N: Non-citizen corporation that has not returned its flight-hour reports. All codes |
| N848EA | Tomark Aero Cz Sro VIPER SD-4 |
Eagle International Aircraft INC Fort Lauderdale, Florida |
Light sport | 2025-11-13 | ValidFAA registration status code V: Valid registration. All codes |
| N854EA | Tomark Aero Cz Sro VIPER SD-4 |
Paige Aviation LLC Wilmington, Delaware |
Light sport | 2025-10-30 | ValidFAA registration status code V: Valid registration. All codes |
| N802EA | Tomark Aero Cz Sro VIPER SD-4 |
Cinca Aircrafts LLC Merritt Island, Florida |
Light sport | 2025-03-25 | ValidFAA registration status code V: Valid registration. All codes |
| N814EA | Tomark Aero Cz Sro VIPER SD-4 |
Individual owner Colorado |
Light sport | 2024-11-25 | ValidFAA registration status code V: Valid registration. All codes |
| N374EA | Tomark Aero Cz Sro VIPER SD-4 |
Piston Aviation LLC Saint Charles, Missouri |
Light sport | 2023-12-23 | ValidFAA registration status code V: Valid registration. All codes |
| N359EA | Tomark Aero Cz Sro VIPER SD-4 |
Individual owner Illinois |
Light sport | 2022-11-12 | ValidFAA registration status code V: Valid registration. All codes |
| N205JR | Tomark Aero Cz Sro VIPER SD-4 |
Salt Meadow LLC Middletown, Delaware |
Light sport | 2021-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N311EA | Tomark Aero Cz Sro VIPER SD-4 |
Individual owner Washington |
Light sport | 2020-02-26 | ValidFAA registration status code V: Valid registration. All codes |
| N613TK | Tomark Aero Cz Sro VIPER SD-4 |
Tomark Aero USA LLC Frisco, Texas |
Experimental | 2010-04-27 | ValidFAA registration status code V: Valid registration. All codes |
| N875EA | Tomark Aero Cz Sro VIPER SD-4 |
Individual owner Idaho |
Light sport | PendingFAA registration status code R: Registration pending. All codes |