Simply Jetpacks — Guide

Getting Started

Craft a jetpack and charge it - jetpacks store energy (FE) and will not fly while empty.
Wear it in the chest armor slot. The jetpack renders on your back and its flight controls become active.
Hold jump to fly. You rise while the key is held and descend when you let go; exhaust particles trail behind you while the engine burns.
Toggle hover mode to float in place - ideal for building, mining a cliff face or fighting from the air.
Watch the HUD. Your throttle, remaining energy and current engine/hover states are shown on screen, so you always know how much flight time is left.

An empty jetpack will not lift you at all, so keep an eye on the energy readout and recharge before long trips.

Flight and Hover

Normal flight - with the engine on, holding jump accelerates you upward; releasing jump lets you fall normally. Horizontal movement works as usual while airborne.
Hover mode - toggled on/off (default key H). While hovering you keep a steady altitude, and instead of free-falling you sink in a slow, controlled descent - soft landings without fall damage from ordinary heights.
Emergency hover - a safety net that engages hover automatically to catch a deadly fall. Its toggle has no default key; bind one in the controls menu if you want to switch it on the fly.
Engine toggle (default key J) - switches the jetpack's engine on or off entirely; with the engine off, jump behaves as vanilla and no energy is drained.

Every toggle announces its new state on screen, so you always know whether the engine, hover mode or charger is active.

The Throttle

The throttle controls how much power the jetpack uses:

Higher throttle = faster ascent and more speed, at a higher energy drain per second.
Lower throttle = gentler flight that stretches a charge much further.

Two ways to adjust it:

In flight with keybinds - default . (period) raises the throttle and , (comma) lowers it, so you can trim power without opening any screen.
From the jetpack screen - press K to open the jetpack GUI and drag the throttle slider to the exact percentage you want.

The current throttle is always visible on the flight HUD.

The Jetpack Screen

Press K while wearing a jetpack to open its screen. It contains:

The throttle slider - drag to set the exact throttle percentage.
Engine toggle button - the master on/off switch for flight.
Hover toggle button - the same hover switch as the H key.
Emergency-hover toggle button - arm or disarm the automatic fall-catch.
Charger toggle button - on charger-capable packs, controls whether the pack charges the gear you are wearing.

The screen reflects the pack's live state, so it doubles as a quick status check.

The Flight HUD

While a jetpack is equipped, a heads-up display shows at a glance:

Throttle - the current power setting.
Energy - how much charge the pack has left; an exact numeric readout can be enabled in the config.
Mode states - whether the engine, hover mode and emergency hover are currently on or off.

The HUD is fully configurable from the client config: it can be disabled, moved to a different screen position, recolored and rescaled (see Configuration).

Energy and Charging

Jetpacks store energy (FE) and drain it while flying; the drain rate scales with the throttle.
Each tier has its own capacity - higher tiers hold more energy and fly faster.
Charge a jetpack in any machine or device that outputs energy into items.
Fluxpacks work the other way around: worn in the chest slot, they discharge their stored energy into the equipment you are wearing, keeping energy-using gear topped up in the field.
The creative jetpack ignores energy entirely - infinite flight with no charging.

An empty jetpack will not fly - the engine simply produces no lift until the pack is recharged.

Tiers and Variants

Jetpack tiers - jetpacks come in multiple tiers; each step up brings more speed and a larger energy capacity.
Armored variants - every tier can be upgraded into an armored version that grants armor protection while keeping full flight capability, so you do not have to choose between a chestplate and a jetpack.
Fluxpacks - wearable charging packs that top up the gear you are wearing instead of flying.
Creative jetpack - infinite flight with no energy cost, intended for creative building and testing.