This repository contains the inference-only EMA weights and matching normalization statistics for the airfoil FSB-DiT model used by Surrogate-Newton CFD. See the project page for the method and results.

The checkpoint intentionally excludes optimizer state, scheduler state, training history, training configuration paths, and non-EMA training weights. It cannot resume training. It is the deployment artifact that reproduces the same model state as loading the private training checkpoint with use_ema=True.

Use the checkpoint and statistics as one release pair. The source training checkpoint had SHA-256 0b8be8a31cc972fb817f46369c1d39efd39b703f307ba28eb85be388c7b2d942. The exported checkpoint contains 237 model-state tensors and was verified tensor-for-tensor against the EMA-applied source state.

Use the maintained downloader from the code repository. It pins an immutable Hub revision and verifies both the byte size and SHA-256 digest before making either file available:

Do not download an unpinned main revision for reproducible deployment.

The recommended production layout keeps these files outside the runtime image and mounts the artifact directory read-only at container start. This permits independent code and model rollbacks, avoids duplicating the weights in each image layer, and makes digest verification straightforward.

The training dataset, full resume checkpoint, and flow-perceptual encoder checkpoint are not distributed in this repository.

The inference checkpoint, matching normalization statistics, and model-card materials in this repository are released under the BSD 3-Clause License.