1703R Hi-Max Ultralight Full Aircraft Kit
1703R Hi-Max Ultralight Full Aircraft Kit
Ready to move from plans to a full aircraft kit? This full aircraft kit product is built for customers who want the clearest path forward with a model-specific kit package and available prefab upgrade levels.
Aircraft family: Part 103 High-Wing
Suggested engine direction: 28-30 hp 2-stroke
Kit Level Options
- Base Kit: the standard full aircraft kit package.
- Kit with Prefabbed Wing Ribs: adds prefabbed wing ribs to reduce rib-building time.
- Kit with Prefab Wing Ribs and Prefab Metal Parts: the most complete kit level, adding prefabbed wing ribs and prefab metal parts.
Also included at every kit level
- Covering kit
- ½-gallon T-88 epoxy kit (a separate item, not part of the covering kit)
- Metal & Hardware Kit
- One fuel tank (additional tanks are optional extras)
- Windshield
- Aircraft plans
Common exclusions unless specifically listed
Engine, propeller, instruments, avionics, battery, wiring, electronics, paint, upholstery, registration, certification, inspection services, training, shipping, and assembly labor are not included unless the product page or invoice specifically says otherwise.
Mini-Max USA recommends starting with plans if you are still comparing models. Full aircraft kits are best for builders ready to commit to a complete path forward.
Build smart. Fly smart. Aviation activities involve real risk and require skill, judgment, inspection, training, and independent verification before use. Buyers are responsible for suitability, assembly, compliance, inspection, operation, and safe use.
Already bought 1703R plans?
We'll credit the price you paid for them, excluding tax and shipping, toward this full kit if you pay for the kit, or pay your layaway down payment, within 60 days of paying for the plans. Plans for a different model don't count.
The credit isn't applied automatically at online checkout. Request it first: after we verify your purchase, we'll apply it to your kit invoice or layaway payment arrangement.
Request your plans creditSpecifications+
Aircraft Specifications
- Wing Layout: High-wing
- Cockpit: Enclosed
- Wingspan: 25 FT
- Wing Area: 112.5 SQ. FT.
- Height: 66"
- Length: 16'
- Cockpit Width: 22"
Weights
- Empty Weight: 253 LBS
- Useful Load: 247 LBS
- Max Gross Weight: 500 LBS
- Wing Loading @ Gross: 4.44 LBS/SQ. FT.
Powerplant
- Engine Options: Hirth F-33
Polini 202 / 260 / 303
Simonini Mini 3 - Fuel Capacity: 5 Gallons
Performance
- Top Speed: 60 MPH
- Cruise Speed: 55 MPH
- Stall Speed (Clean): 29 MPH
- Stall Speed (Flaps): 22 MPH
- Climb Rate: 650 FPM
- VNE: 90 MPH
- Takeoff (Grass): 150 FT
- Landing Roll (Grass): 180 FT
Build Information
- Base Kit Build Time: 350-400 Hours
- Prefab Kit Build Time: 250-300 Hours
Reference empty weight for a finished aircraft; each completed aircraft must be weighed individually.
Features (Standard / Optional)
- Flaperons: Optional
- Wheel Pants: Optional
- Wing Tips: Optional
- Steel Gear: Optional
- Band Brakes: Optional
- Black-Max Brakes: Optional
What's Included+
The 1703R Hi-Max Ultralight full aircraft kit ships as a model-specific package with builder-selectable kit levels, so you buy exactly the amount of prefab work you want for your homebuilt aircraft.
- Base Kit — the standard full aircraft kit package.
- Kit with Prefabbed Wing Ribs — adds prefab wing ribs to save build time.
- Kit with Prefab Wing Ribs and Prefab Metal Parts — the most complete level, adding prefab ribs and prefab metal parts.
Also included at every kit level
- Covering kit
- ½-gallon T-88 epoxy kit (a separate item, not part of the covering kit)
- Metal & Hardware Kit
- One fuel tank (additional tanks are optional extras)
- Windshield
- Aircraft plans
Not included unless listed
Engine, propeller, instruments, avionics, battery, wiring, paint, upholstery, shipping, assembly labor, registration, certification, inspection, and training are not included unless the product page or invoice specifically says so.
Base vs. Prefab vs. Quick-Build+
1703R kit levels: Base, prefab wing ribs, or prefab ribs and metal parts
Every Mini-Max full aircraft kit is sold at three kit levels. The airplane, the plans and what the kit includes do not change between levels. What changes is how much of the wing-rib building and metal-part fabrication is finished before the kit ships.
| What changes | Base KitSKU 1703R | Kit with Prefabbed Wing RibsSKU 1703R-PF | Kit with Prefab Wing Ribs and Prefab Metal PartsSKU 1703R-QB |
|---|---|---|---|
| Price | $12,499.99 | $13,199.99+$700.00 over Base | $13,999.99+$1,500.00 over Base |
| Wing ribs | You build every wing rib yourself from the rib materials in the kit. | Wing ribs arrive prebuilt. Rib building is the most repetitive, detail-sensitive part of the wing, so this is the time saver most builders ask for first. | Wing ribs arrive prebuilt, as in the prefabbed-ribs level. |
| Metal parts | You lay out, cut and fabricate the metal fittings from the metal stock supplied with the kit. | Same as Base: you fabricate the metal fittings. | Selected metal components arrive prefabricated, saving layout, cutting and fabrication time. This is the most complete kit level. |
| Everything else | Identical at all three levels: the airframe materials, the covering kit, the separate ½-gallon T-88 epoxy kit, the Metal & Hardware Kit, one fuel tank, a windshield and the aircraft plans. Additional fuel tanks are optional extras. | ||
| Mini-Kit equivalent | Wing Rib Kit (Raw Materials) and Metal & Hardware Kit (Standard) | Wing Rib Kit (Prebuilt Wing Ribs) | Wing Rib Kit (Prebuilt Wing Ribs) and Metal & Hardware Kit (Prebuilt Metal Parts) |
| Build time | The longest of the three. Each model's base-kit estimate is on its product page under Build Time & Skill Level. | Shorter than Base. The published prefab estimate assumes both prebuilt ribs and prefab metal parts, so expect this level to land between the two figures. | The shortest of the three. Each model's prefab estimate is on its product page under Build Time & Skill Level. |
| Best for | The lowest price, and builders who want to make every part themselves and have the shop time to do it. | Builders who want to skip rib building but are comfortable making metal fittings. | Builders who want the shortest path to assembly, or the least shop equipment for metal work. |
Included at every kit level
- Covering kit
- ½-gallon T-88 epoxy kit (a separate item, not part of the covering kit)
- Metal & Hardware Kit
- The aircraft plans
- The airframe sections used in the staged-layaway schedule: empennage, wing rib, wing assembly, fuselage, Metal & Hardware, landing gear and fabric kits
Not included at any kit level
- Engine and propeller
- Instruments and avionics
- Battery, wiring and electronics
- Paint and upholstery
- Registration, certification, inspection services and training
- Shipping and assembly labor
Usually bought separately
- Engine, propeller and any firewall-forward accessories your engine needs
- Flight instruments and avionics
- Paint and finish coatings
- Tools and shop supplies
- Registration, inspection and documentation fees
- Transportation, crating or delivery unless stated separately
The set of prefabricated metal components varies by model. Ask Mini-Max USA for the current list for your aircraft before you order. Prefer to build in stages? 1703R Mini-Kits sell the same sections one at a time. See What's Included in a Full Kit for the complete list and exclusions.Buying guides: What does it cost to finish a Mini-Max? · Base vs. Prefab vs. QuickBuild: what changes? · Building a Mini-Max in a garage: space, tools and experience
Build Time & Skill Level+
Estimated build time depends on the kit level you choose and your experience. Prefab wing ribs and prefab metal parts meaningfully reduce build time.
- Base kit build time: 350-400 Hours
- Prefab quick-build kit build time: 250-300 Hours
This is an amateur-built, wood-and-fabric aircraft designed for hands-on homebuilders. Typical skills:
- Basic woodworking, measuring, and drilling
- Riveting and assembly of metal parts
- Epoxy work and fabric covering
- No welding or advanced machining required for a standard build
Mini-Max USA builder-assist support is available to help you finish.
Part 103 & Experimental+
The 1703R Hi-Max Ultralight is designed as a single-seat Part 103 ultralight candidate. Under FAA Part 103, a legal ultralight needs no pilot license, no medical, and no aircraft registration when the finished aircraft meets the Part 103 limits.
- Single-seat, for recreation or sport use only.
- Empty weight at or below 254 lb (with allowances for floats or a ballistic parachute).
- Top speed 55 knots (about 63 mph) or less; power-off stall speed 24 knots or less.
- Fuel capacity of 5 U.S. gallons or less.
Part 103 also makes the 1703R Hi-Max Ultralight an affordable way to build flight time — low purchase and operating cost for recreational flying and hour building.
Final Part 103 eligibility depends on your finished configuration, weight, and equipment. You are responsible for verifying actual empty weight, speed, stall speed, and fuel capacity before flight. No listing statement is an FAA determination of eligibility.
Shipping & Returns+
Most in-stock items ship within 3–5 business days. Full aircraft kits and large or heavy items may ship by motor freight, and transit times vary.
For returns, freight quotes, or questions, review our Refund Policy, see Shipping & Pickup, or contact us.
