Fwd: One of two flying single blade J-2 cubs

By

 


For those interested in aviation history/ I had never heard about this one.


One of two flying single blade J-2 cubs

This is super interesting and totally bizarre, so I did a little research. The idea is that a single blade would be more efficient than multiple blades because the single blade is always travelling through undisturbed air. The propeller is counterweighted and mounted eccentrically on the hub to keep it balanced. It also has fore-aft pivot so the prop pitch self-adjusts to the most efficient angle - you can move the tip of the blade forward and back several inches with your hand.
Apparently the design worked; in 1939 the Everel prop was tested on a Taylorcraft in a race and won by quite a bit. However, shortly after the introduction of the prop, powerful 50HP engines were developed which rendered the efficiency gains of the single blade moot. Considering that the balance of the prop was very fickle in changing weather, the already mechanical complex prop just wasn't worth the effort, so the design never caught on.
It's a nifty bit of engineering and a cool piece of history.
http://i.imgur.com/wTy8XO7.jpg




Popular posts from this blog

Fwd: British Imperial Airways 1930's

By
Image
    Begin forwarded message: From: beck8@comcast.net Subject: British Imperial Airways 1930's Date: January 14, 2014 10:36:14 PM EST            British Imperial Airways 1930's Flying the airlines in the thirties was a lot more fun than it is now. It was more leisurely and had more class. Certain elitist and anti-British people have no time for these period "rich types". People like these, the risk takers (especially with their own money) were the backbone of the UK. They flew from the first airline operations across the Channel in 1919.   If people had serious money in the 1930s and traveled internationally, they may well have flown on one of these large (130 foot wingspan) Handley Page bi-plane aircraft, which were the mainstay of British Imperial Airways at the time. They carried 26 passengers in fi...
Read more

A Saturday at the Club House

By
Image
Some of you are aware that we were attempting to do some Young Eagle flights  tomorrow morning. That fell through since the organization we were working with had a change of heart, so it will be business as usual for the EAA 650 Saturday morning hangar flying session at the club house.  For those of you who were weren't aware Jerry received his Wright Brothers Master Pilot award given by the FAA for pilots who have flown for over 50 years of accident/incident free flying.  This was a surprise ceremony following Jerry's presentation on flying in Vietnam complete with training aids! Jerry also prepard a breakfast casserole as well as a birthday cake with ice cream since it was just a few days past his birthday. Here is a press release I sent out to the local papers. If there is a slow news day Jerry will be added as filler right before the want adds! Jerry Harkin EAA 650 Club president was recently surprised by a visit from the FAA. ...
Read more

Saturday Doings 2023

By
 6 Jan- Steve Clark, Trip to the Great North flying across Canada and Alaska in his RV-10.          Thanks Steve, good turnout and great presentation of your adventure 4 Feb- Ask the CFI, Chuck Molzon local CFI will be in to discuss the things we always forget about. Rules and regulations that only get brushed up on prior to a flight review. Bring your EFB (electronic flight bag) to be able to quick reference material. If you are a paper guy bring that too. 4 Mar BMG Airport Manager, Carlos Laverty will be here to update us on the many projects occurring at the airport and answer questions you might have. 1 Apr TBD Road trip with car pool and fly out destination.  6 Mar TBD Road trip with car pool. Not the same destination as April.  If you have any ideas or topics you would be interested in let me know.  EAA 650 VP  Tim Sparks
Read more