If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
SIGMA, the glider to incorporate all possible technical advances.
The link below produces Nick Goodhart's essay on the marvels of
Sigma, a Britsh effort to make a world beater; this was before it flew! It failed probably due to excessive mechanical complexity and the high pilot work load. also the complicated extending flap proved difficult to implement and seal; the handling left a lot to be desired. someone claimed Sigma was designed by committee! It was abandoned with what were considered intractable problems, and put up for bids; it was donated to Dr David Marsden, who had already designed and flown the Gemini with slotted extending flap. While on sabatical at Cranfield, (RAF research) he made conversion of Sigma a research project; when I visited him at Cranfield , he showed me the massive Sigma wing with installation of his own slotted flap in progress. This was a sucess. It was test flown and the flap system worked as expected. However it was found to have really challenging handling problems, especially on landing. I expressed interest in flying it, but was refused as the only other highly competent pilot to fly it found it a handful. John Firth PS Nick Goodhart chooses 100KM TRIANGLE as a hypothetical task; these days, the challenge would be at least 500 KM and not much talk of stopping to thermal! |
#2
|
|||
|
|||
SIGMA, the glider to incorporate all possible technical advances.
On Saturday, February 10, 2018 at 12:18:30 PM UTC-5, john firth wrote:
The link below produces Nick Goodhart's essay on the marvels of Sigma, a Britsh effort to make a world beater; this was before it flew! It failed probably due to excessive mechanical complexity and the high Here is the link to Goodhart's Sigma presentation at the 1970 Soaring Symposia: http://www.betsybyars.com/guy/soarin.../70-sigma.html |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Advances For New Flight Technologies | Larry Dighera | Piloting | 0 | November 6th 17 02:20 PM |
Way to go Joe! (energy advances) | Duane Ritter | Piloting | 0 | March 26th 11 09:41 PM |
Sigma Tek HSI | [email protected] | Piloting | 1 | September 28th 08 12:57 AM |
Sigma Tek HSI | [email protected] | Home Built | 1 | September 28th 08 12:57 AM |
while staircases relatively project dollars, the cups often incorporate in connection with the reliable companys | Virginia | Piloting | 0 | August 12th 07 11:39 PM |