---
title: Projectile Power
description: "Play 0x87, server → client."
---

`play` · `0x87` · **clientbound** (server → client)

Sets the acceleration power of a projectile such as a fireball or wither skull. The server sends it when the projectile is spawned or its power changes. The client uses it to predict the projectile path.

Sent by the server, read by the client. Listen for it with `client.on("ProjectilePower", (data) => …)` on the receiving side.

## Fields

| Field | Type | Notes |
|---|---|---|
| `id` | VarInt |  |
| `accelerationPower` | Double |  |

## Send it

```ts
await client.sendPacket("ProjectilePower", {
  id: /* VarInt */,
  accelerationPower: /* Double */,
});
```

Field aliases listed under Notes are accepted as alternative keys when writing.

Source: [`src/Core/Versions/776/Packets/play/clientbound/ProjectilePower.ts`](https://github.com/GDLev/mc-protocol/blob/master/src/Core/Versions/776/Packets/play/clientbound/ProjectilePower.ts)