| Tail Number / N-Number | N5104C |
| Manufacturer | I.C.A.-BRASOV (ROMANIA) |
| Model | IS-28B2 |
| Manufacturer's Serial Number | 70 |
| Aircraft Type | Glider |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 0 engines |
| Average Cruising Speed | 81 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | MID-CONTINENT SOARING INC |
| Street | 24985 159TH ST |
| City | LEAVENWORTH |
| State | KS |
| Zip Code | 66048-7336 |
| Region | Central |
| County | Leavenworth County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2000-07-21 |
| Last Action Date | 2020-06-14 |
| Expiration Date | 2027-11-30 |
| Status | Valid Registration |
| Mode S Code | 51462126 |
| Mode S Code Hex | A66456 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N5104C.
| Tail Number / N-Number | N5104C |
| Manufacturer | BEECH |
| Model | B35 |
| Manufacturer's Serial Number | D2385 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 120 miles per hour |
| County | Leavenworth County |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1989-07-26 |