April 2025

Vintage Vibes: Unleashing the Charm of the RETROL Hot-bulb Engine

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Improvements to the Retrol-HM01 The little Chinese Retrol HM-01 from Stirlingkit runs quite well out of the box, but a few simple modifications can slow it down to a more restrained pace. The first and simplest modification is to use the extra length of spring provided to create a custom spring. Made longer so the […]

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The RETROL Gasoline Engine: Hot-bulb Power Revived

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The RETROL Gasoline Engine: Hot-bulb Power Revived Today, we’re introducing the RETROL Vintage Gasoline Internal Combustion Engine, a unique model inspired by the classic stationary engines of Europe. Specifically, this engine draws its design from the Hot-bulb Engine, a type of internal combustion engine that gained popularity during the early 20th century due to its

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