valve adjusting guide: Pratt & Whitney, Twin Wasp

Date:1940s
Medium:Plastic, metal, ink
Credit Line: Gift of Homer Hudson
Accession Number:1999.015.001
Dimensions:3 x 3 inches (7.6 x 7.6 cm)
Collection:Aviation Museum
Category:Equipment
Subcategory:Tool
Description

Valve adjusting guide issued by Pratt & Whitney Aircraft for Twin Wasp engines; circular white, red, blue and black with center wheel and indicators for piston number, center compression stroke, adjust exhaust, depress intake, depress exhaust, and adjust intake; instructions printed on reverse.

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<div id="sfomuseum-image-1746680893" class="sfomuseum-image" style="max-width:640px; margin:auto 0;">	 
  <a href="https://collection.sfomuseum.org/objects/1511908981/"><img src="https://static.sfomuseum.org/media/174/668/089/3/1746680893_hYKA9t50q4LNF3KvJsMwQafsVflozRDT_z.jpg" alt="valve adjusting guide: Pratt & Whitney, Twin Wasp" /></a>
  <div id="sfomuseum-image-caption-1746680893" class="sfomuseum-image-caption" style="margin-top:1rem; font-style:italic;">
    <div><strong>Valve adjusting guide: Pratt & Whitney, Twin Wasp</strong> 1940s</div>
    <div>Gift of Homer Hudson</div>
    <div>Collection of SFO Museum <a href="https://collection.sfomuseum.org/objects/1511908981/">1999.015.001</a></div>
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