DocBlake Posted August 21, 2015 #1 Posted August 21, 2015 I'm building the POF model Armed Virginia Sloop. The vessel had two elm tree pumps to keep the bilge dry. Would those low-tech pumps have required a lower deck well to protect the bottom end from damage as a chain pump would require? I'd like to add one to the model, combined with a shot locker. Dave Click on images in posts to view them in full resolution! Click on the builds below and link to the log. Current Builds: -Gaff-Rigged Sloop, 1/4 Scale (3" = 1') -Chapman Water Hoy 1768 by DocBlake - Scratch Build - 1:48 scale -Hannah - 1:32 scale, Scratch-Built Plank-on-Frame Admiralty style -Generic Sharpie by DocBlake. 3/4" = 1' scale. NRG plans. -Fair American 1780 by DocBlake - Lauck Street Shipyard - 1/48 scale - POF -Independence 1775 by DocBlake - Artesania Latina - 5/16" scale -HMS Triton Cross Section by DocBlake - 1/24 scale Completed Builds: -Bomb Vessel Granado 1742 Cross Section - 1:32 Scale Scratch Build -British Capstan circa 1777 by DocBlake - FINISHED - 1:16 Scale -HMS Blandford - Cross Section - Scratch Build -1/32 Scale -17th Century Battle Station by DocBlake - HMS Mordaunt - 1:32 -17th Century Naval Cannon - 1:12 Scale -Royal Navy Ship of the Line Cross Section by DocBlake - (Mamoli's "Constitution") - 1:93 scale -Armed Virginia Sloop 1768, 1/48 scale. -Virginia Pilot Boat "Swift", 1805, 1/50 scale -18th Century Naval Battle Station, 1/24 scale -Armed Virginia Sloop 1768 "Patrick Henry", 1/32 scale, Lauck Street Shipyard, POF, Admiralty Style.
grsjax Posted August 21, 2015 #2 Posted August 21, 2015 (edited) The elm tree pump was just a hollowed log with a valve in it. The valve would let water through on the down stroke and lift it during the up stroke. The "tree" part of the pump, i.e. the pipe or body goes all the way down to the bilge and doesn't usually have a well or other structure associated with it. The pump body or tree doesn't necessarily have to be of elm although that was the traditional wood used. Any hard, rot resistant wood would do. If the pump was set up as a wash pump it would go through the hull and would probably have had a separate well structure to keep the water out if the pump had to be removed for repairs. Edited August 21, 2015 by grsjax Canute, mtaylor, popeye2sea and 1 other 4 My advice and comments are always worth what you paid for them.
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