EHV 8x8 Mk1 “Heavyram”

EHV 8x8 Mk1 “Heavyram” is a large 8-wheel RC off-road vehicle designed within the Ironhead Division universe of Elvis RC Studio.

This is not simply a big 8x8 model. It was designed as a Heavy Exploration Vehicle, built to move a large and heavy chassis with stability and to perform confidently on rough terrain.

Within the Ironhead Division universe, the Heavyram is a heavy-duty support platform responsible for transporting large cargo, supporting long-range expeditions, and moving through harsh environments.

The EHV is designed around the concept of a futuristic electric-drive heavy exploration vehicle. Instead of emphasizing a traditional internal combustion engine layout, the design takes advantage of the electric-drive concept by lowering the cabin height and keeping the visual center of gravity low.

As a result, the vehicle has a unique proportion that feels different from a conventional large truck. The low and wide cabin, long chassis, eight driven wheels, and heavy-duty cargo platform come together to create the distinctive presence of the EHV.

With an overall length of approximately 900 mm, eight driven wheels, first and second axle steering, a large cargo area, and a strong tactical body design, the completed vehicle has a very heavy and impressive presence.

Main Features

1. Large 8x8 Platform with an Electric-Drive Concept

The EHV 8x8 Mk1 “Heavyram” is a large 8-wheel vehicle designed around 1/10 scale RC components.

When completed, the vehicle is approximately 900 mm long, giving it a driving feel and visual presence that is completely different from a typical 4x4 crawler.

This vehicle is based on the concept of an electric-drive heavy exploration platform. Rather than following a traditional truck layout centered around an engine bay, the EHV uses a low cabin and long body proportion that better matches the idea of an electric-drive vehicle.

The lowered cabin not only gives the vehicle a unique appearance, but also makes the whole body look more stable and low-slung. This proportion helps the Heavyram feel less like a normal truck and more like a heavy electric exploration vehicle from the Ironhead Division.

The traction created by eight wheels, combined with the long wheelbase, helps the vehicle maintain a stable posture on rough terrain. It also delivers the slow, heavy movement that makes large 8x8 vehicles so enjoyable to drive.

2. Low Cabin and Unique Body Proportions

One of the most important design features of the EHV is its low cabin.

Traditional large trucks often have a tall cabin and a bulky front section because of the engine room and driver compartment layout. However, the EHV uses an electric-drive concept, reducing the need for a conventional engine-space design and allowing the cabin height to be lowered.

This gives the vehicle a visually lower center of gravity and, when combined with the long 8x8 chassis, creates a more stable and powerful impression.

The low cabin, wide body, and long cargo platform create the unique proportions of the Heavyram. These proportions give the vehicle the feeling of a real military or industrial special-purpose machine, while also adding the futuristic exploration-vehicle character of Elvis RC Studio.

3. First and Second Axle Steering

This model is designed to use steering on both the first and second axles.

Because a large 8x8 vehicle has a long chassis, using only the first axle for steering can result in a very large turning radius. The EHV uses both first and second axle steering to allow smoother and more stable turning, even with its long body.

Rather than using the same steering angle on both axles, adjusting the steering ratio between the first and second axles with radio mixing or EPA settings can help reduce tire scrub and create a more stable driving setup.

4. Designed for Stable Rough-Terrain Driving

The EHV is not designed for high-speed driving. It was designed to move a large body with stability and to travel through rough terrain with confidence.

The structure of the vehicle was developed with rock crawling and trail driving in mind. Several parts are designed to interlock with one another, helping the heavy chassis respond more flexibly to twisting forces during off-road driving.

This structure helps keep the body strong while reducing the concentration of stress in a single area when the vehicle is under load.

One of the biggest attractions of the EHV is the way its eight wheels grip the terrain and slowly push the vehicle forward. It offers a heavy, machine-like driving feel that is completely different from smaller and faster RC vehicles.

5. Drivetrain Access and Maintenance

Large vehicles can become difficult to maintain after assembly. The EHV was designed with this in mind, making it easier to access the drivetrain and important mechanical areas.

The gearbox, driveshafts, link rods, and servo area are arranged so that inspection, adjustment, and maintenance can be done with as little unnecessary disassembly as possible.

Although a large 8x8 vehicle naturally has more parts and a longer assembly process than a smaller model, the EHV was designed to make long-term use and maintenance more manageable for builders.

6. Compatible with 80 mm or 90 mm Shocks

The EHV is designed to use either 80 mm or 90 mm shocks.

80 mm shocks provide a more balanced finished proportion and better scale appearance. 90 mm shocks provide more ground clearance and better rough-terrain capability.

However, if shocks shorter than 80 mm or longer than 90 mm are used, tire-to-fender interference or driveshaft length issues may occur. If shocks outside the recommended range are used, the builder should check all clearances and make the necessary adjustments.

7. Body Structure Designed for Printing and Assembly

The body and chassis of the EHV are divided into multiple parts so they can be printed on common FDM 3D printers.

Although this is a large model, the parts were designed around a 220 mm class print bed. Each part was divided with both assembly and strength in mind.

After printing, the vehicle can be assembled using screws. Depending on printer condition, filament, and support removal quality, some light sanding or hole cleanup may be required.

Recommended Driving Environment

The EHV 8x8 Mk1 “Heavyram” is suitable for the following types of driving:

Rock crawling Trail driving Dirt roads, gravel roads, and rocky terrain Slow and heavy scale driving Builders who enjoy the realistic movement of a large 8x8 vehicle

This model is not intended for high-speed driving. It was designed for stable movement, the strong presence of a heavy vehicle, and confident driving on rough terrain.

Required Parts

This product is a set of STL files for 3D printing. A completed vehicle, printed parts, electronics, and hardware are not included.

Additional RC parts and hardware are required to complete the build.

Examples:

3D printer PLA+ or similar filament RC axles Gearbox Motor and ESC Servos Transmitter and receiver Battery Shocks Link rods Driveshafts Screws Wheels and tires

Please refer to the separate Parts List and assembly guide for the exact non-printed parts and link rod configuration.

Notes for Builders

The EHV is a large 8x8 platform, so the assembly process is longer and there are more setup points compared to a typical 4x4 vehicle.

During assembly, it is recommended to carefully check the following:

Steering direction of the first and second axles Neutral position of the steering servos Steering angle ratio between the first and second axles Link rod direction and rod end angle Driveshaft angle Wheel tightness on the axles Spur and pinion gear noise Rotation direction of each wheel Tire and fender clearance

When using metal spur and pinion gears, drivetrain noise may be noticeable. If needed, applying a small amount of grease to the spur and pinion gears can help reduce metallic gear noise.

Also, if the wheels are tightened too much on the axles, unnecessary load or noise may occur in the drivetrain. After assembly, make sure each wheel rotates smoothly.

Ironhead Division Universe

The EHV 8x8 Mk1 “Heavyram” belongs to the Ironhead Division lineup of Elvis RC Studio.

Ironhead Division is a fictional expedition organization that operates in extreme environments, performing exploration, transport, rescue, and power-support missions. Within that universe, the Heavyram is a heavy support vehicle designed to carry equipment and cargo through rough terrain.

The concept of an electric-drive heavy-duty platform is reflected throughout the design of the Heavyram. Because it is imagined as a futuristic exploration vehicle without a traditional engine layout, the EHV was able to use a low cabin and unique body proportions, which became a major part of its identity.

The massive body, strong exterior lines, long wheelbase, and eight driven wheels were all designed to make this vehicle feel less like a display model and more like a real mission-ready machine.

Final Words

The EHV 8x8 Mk1 “Heavyram” is a large 8-wheel RC platform created by Elvis RC Studio.

It combines large size, heavy movement, an 8x8 drivetrain, first and second axle steering, an electric-drive concept, a low cabin, and the Ironhead Division universe to create a build and driving experience that is very different from a typical RC crawler.

This model is recommended for builders who enjoy large RC vehicles or want to print and assemble a rough-terrain-capable 8x8 platform.

It moves slowly, but advances with strength. That is the EHV 8x8 Mk1 “Heavyram.”

To print this model, a 3D printer with a build volume of at least 220×220×220mm is required

vehicle Specifications 902 x 266 x 195 (height) - Only the 3D-printed body and chassis

Compatible Battery Size This model can accommodate batteries of various sizes.

Recommended Wheel Size Tires with an outer diameter of 120 mm or less 1.9-inch rims

https://youtu.be/pGkTCE0G2Do - asemdle video

https://youtu.be/chB6X-bTkwE - Driving footage

The Elvis RC Community is hosted on a Facebook group, providing a space to ask and answer questions related to assembly.

In this group, you can explore other builders' creations, share ideas, and connect with fellow enthusiasts.

Join us to gain insights and enjoy the fun of building RC cars together!

https://www.facebook.com/groups/1297721991377726