Glide Ratio

{
  "altitudeAglFt": 5000,
  "asOf": "2026-10-11T14:44:08.322Z",
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "effectiveGroundGlideRatio": 6.23,
  "glideDistanceFtStillAir": 45000,
  "glideDistanceKmStillAir": 13.72,
  "glideDistanceNmStillAir": 7.41,
  "glideDistanceNmWithWind": 5.13,
  "glideDistanceStatuteMilesStillAir": 8.52,
  "glideRatio": 9,
  "glideSpeedKt": 65,
  "glideTimeMin": 6.84,
  "groundspeedKt": 45,
  "headwindKt": 20,
  "notChecked": [
    "real glide performance: the published ratio holds only at best-glide speed with a feathered or stopped propeller and clean configuration; wind, turns, turbulence, sink and weight change it a lot",
    "the time to set up, troubleshoot and choose a field: allow height for the pattern and landing",
    "…2 more"
  ],
  "reasons": [
    "Distance = height x glide ratio; sink rate = true airspeed / glide ratio; with wind, ground distance scales by groundspeed / airspeed.",
    "1 knot = 101.27 ft/min; 1 nm = 6076.1 ft."
  ],
  "sinkRateFpm": 731,
  "source": "computed locally",
  "summary": "From 5000 ft at 9:1 the aircraft glides 7.4 nm (13.7 km) in still air. Sink rate 731 ft/min, 6.8 minutes aloft; with a 20 kt headwind the groundspeed is 45 kt and the distance 5.1 nm.",
  "verdict": "COMPUTED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://aviation-calc.x402tookit.com/glide-ratio?altitudeAglFt=5000&glideRatio=9&glideSpeedKt=65&headwindKt=20'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://aviation-calc.x402tookit.com/glide-ratio?altitudeAglFt=5000&glideRatio=9&glideSpeedKt=65&headwindKt=20' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Faviation-calc.x402tookit.com%2Fglide-ratio
const res = await pay("https://aviation-calc.x402tookit.com/glide-ratio?altitudeAglFt=5000&glideRatio=9&glideSpeedKt=65&headwindKt=20");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://aviation-calc.x402tookit.com/glide-ratio?altitudeAglFt=5000&glideRatio=9&glideSpeedKt=65&headwindKt=20")
    print(res.status_code, res.text)