Geoff_H Posted November 22, 2023 Author Share Posted November 22, 2023 I visited Spacey, really nice guy, sat in his very nice Hummel. I am convinced it is the way to go. I have started working on my Hummel. 4 1 1 Link to comment Share on other sites More sharing options...
facthunter Posted November 22, 2023 Share Posted November 22, 2023 They are a nice thing. Really quite small though. Nev 1 Link to comment Share on other sites More sharing options...
Litespeed Posted November 23, 2023 Share Posted November 23, 2023 Great news Geoff. What powerplant will you use? Lots more options these days than a half vw. Will you do any mods or just a plain build? Please polish it, love a shiny bird. Link to comment Share on other sites More sharing options...
Geoff_H Posted November 23, 2023 Author Share Posted November 23, 2023 The Hummel aircraft is a derivation of the Windwagon and the Hummel. The Windwagon has smaller chord wings, faster but not sure which wings would be better. Any ideas on which to choose. I Waa thinking of an industrial v, but again maybe the 1/2 vw would be best. Any ideas. Geoff Link to comment Share on other sites More sharing options...
facthunter Posted November 23, 2023 Share Posted November 23, 2023 The 1/2 VW has plenty of shortcomings. There MUST be something better these days. A V motor has better eveness of piston inertia. The VW is a known entity but as a flat twin must be a rougher running thing. (Cylinder offset). . Some conversions use the original crankcase. Nev Link to comment Share on other sites More sharing options...
Geoff_H Posted November 23, 2023 Author Share Posted November 23, 2023 The windwagon is nearly identical to Hummel, they are linked. Wing chord is one of the very few differences Link to comment Share on other sites More sharing options...
onetrack Posted November 23, 2023 Share Posted November 23, 2023 I used to hire 55cfm trailer-mounted Atlas-Copco air compressors, to operate jackhammers on rock drilling, that used a VW engine (I STR they called them VolksAir) - with two cylinders altered to pump air, while the remaining two cylinders ran as normal to drive the other two. I cannot ever remember an engine so rough-running and unbalanced, I'm still amazed today, that the engines didn't fall out the trailers, they were that rough. And they were pri**s of things to start, too! 1 1 Link to comment Share on other sites More sharing options...
spacesailor Posted November 23, 2023 Share Posted November 23, 2023 Geoff Just a thought! . IF you want to ' polish ' your Hummel , please try out your ' arm ' power on mine. LoL How about a ' dark colour undersides ' with that sparklingly polished uppersides. Then when making your circuit those wings will flash a signal to all us ' wannabes ' waching .. spacesailor Link to comment Share on other sites More sharing options...
BrendAn Posted November 29, 2023 Share Posted November 29, 2023 On 23/11/2023 at 7:50 PM, onetrack said: I used to hire 55cfm trailer-mounted Atlas-Copco air compressors, to operate jackhammers on rock drilling, that used a VW engine (I STR they called them VolksAir) - with two cylinders altered to pump air, while the remaining two cylinders ran as normal to drive the other two. I cannot ever remember an engine so rough-running and unbalanced, I'm still amazed today, that the engines didn't fall out the trailers, they were that rough. And they were pri**s of things to start, too! same deal with booster compressors on rc drill rigs. used a 3208 cat and a 692 gm . 1 bank was compressor the other bank engine. they run like hairy goats but they take a 900cfm compressor from 350 psi to 900 cfm 1000 psi. 1 Link to comment Share on other sites More sharing options...
facthunter Posted November 30, 2023 Share Posted November 30, 2023 There was some cast iron radial used for the same purpose. It's a ready available convenient way of doing it without having to build 2 distinct units if you have separate heads. The firing order might be a bit "How's your Father" and it could do with a heavier flywheel. Nev Link to comment Share on other sites More sharing options...
onetrack Posted November 30, 2023 Share Posted November 30, 2023 The Ingersoll Rand Spot-Air is perhaps what Nev was referring to. 6 cyl vertical radial with 3 cylinders driving and 3 cylinders compressing. You even started them with a rope wrapped around a pulley! - because they weren't fitted with a starter. The railways used them for tamping ballast. 1 Link to comment Share on other sites More sharing options...
planedriver Posted November 30, 2023 Share Posted November 30, 2023 Well, that's a blow for some! 1 Link to comment Share on other sites More sharing options...
facthunter Posted November 30, 2023 Share Posted November 30, 2023 Good thing it's still there to see running and complete. Nev 1 Link to comment Share on other sites More sharing options...
onetrack Posted December 1, 2023 Share Posted December 1, 2023 Ingersoll Rand must have manufactured quite a few units of the Spot-Air, because they're not all that hard to find for sale. 1 Link to comment Share on other sites More sharing options...
facthunter Posted December 1, 2023 Share Posted December 1, 2023 They were BIG in AIR Compressors. Nev 1 Link to comment Share on other sites More sharing options...
pmccarthy Posted December 1, 2023 Share Posted December 1, 2023 Ingersoll Rand made their reputation with the Class AA2 steam powered compressor, on the left. My friend Jim was the Australian manager many years ago and paid for this machine to be restored. 4 Link to comment Share on other sites More sharing options...
facthunter Posted December 1, 2023 Share Posted December 1, 2023 That's WAY back. Nev Link to comment Share on other sites More sharing options...
Blueadventures Posted January 16 Share Posted January 16 (edited) On 13/11/2023 at 11:27 AM, Blueadventures said: I recall a guy Bob Hyman (not sure of spelling maybe Hynam) build two. One in Canada and one in Rockhampton; I watched its first flight and it went great. Flight was at the Central Queensland Gliding Club. He was an RAA instructor with a Drifter. sandman on this forum also had a drifter there and may have a contact for bob; send him a pm. I came across these images tonight. The alloy and red one is the Teenie Two Bob built and its first flight at McMaster Field west of Rockhampton (my glider back then is in the background); it was the second he built the first he made in Canada. The other if its a Teenie was at Ingham, Qld. RAA search shows Bob 19-7319 is still in current rego so must be flying somewhere. Edited January 16 by Blueadventures 2 1 Link to comment Share on other sites More sharing options...
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