Slingsby Petrel 3.4 metre designed by Chris Williams

[john stones 1 - Moderator]

Top job Peter. 👍

[Frank Skilbeck]

Cracking, look forward to seeing it at the Sherlow aerotow.

[Trevor]

Well done Peter! Wishing you many more happy flights with the Petrel.

 

Trevor

[MikeQ]

Well done Peter.  Looks fantastic.  Hope the ribs etc are all sorted and you get out to fly it.  Cheers.  Mike

 

ps.  I’ll probably be starting mine soonish and will take all your tips on board 😀

[Chris Williams]

Good job, Peter, trouble is...you now have an empty workbench!

[Peter Garsden]

Well I have just returned from a more or less windless PSS weekend at the Orme.  I took the Petrel because I wanted to try it out in light winds, which we had in abundance - no good for PSS heavies but OK for the Petrel.

 

I arrived on Friday evening to Sun and about 8 to 10mph on the NW slope. I quickly assemble and Stevie chucked her off. She soared effortlessly as though on rails. She does dive a bit so I think I will remove 2 chunks of lead from the cockpit

 

 

I flew her for about an hour, so delightful was the experience. The wind dropped to about 6mph and she seemed to cope with it easily rising even in that wind. I also flew her the following morning on the North East Pier slope which was equally rewarding and idyllic. This one will be flown a lot. I must go, however to find some accomodation for the Shrelow Aerotow next weekend.

[John Minchell]

Peter, here is one option for B&B right next to the Sherlowe airfield ready for the next one in August.  https://www.ercallmill.co.uk/

 

Regards John M

[MikeQ]

Hi Peter ... what two sizes of piano wire did you use on the AMT?

 

Cheers

 

mike

[Peter Garsden]

On 28/05/2023 at 22:46, MikeQ said:

Hi Peter ... what two sizes of piano wire did you use on the AMT?

 

Cheers

 

mike

Sorry Mike, didn't see this. In answer to your question I went to my local engineering shop and bought some concentric sizes of tubing that all fit effectively inside each other. Unbeknown to me I bought mild steel, which I recently had to replace with piano wire and the sizes are 1/8" and 3/32, but you could use the metric equivalent of say 3mm and 2.5mm or 2mm I am sure.

[Graham Donaldson]

Has anyone put a motor into the Petrel? Am thinking of doing this and some guidance would be great.8

[Paul De Tourtoulon]

Nice job, I don't know what your multiplex tow hook is like, but I had something like it, and it needed a 3+kilo servo for a safe release.

[Frank Skilbeck]

1 hour ago, Paul De Tourtoulon said:

Nice job, I don't know what your multiplex tow hook is like, but I had something like it, and it needed a 3+kilo servo for a safe release.

This is the MPX One, very simple and as it only needs a very short movement you use the innermost hole in the servo arm to get max pull from standard 3+kg-cm servo 

[Paul De Tourtoulon]

1 hour ago, Frank Skilbeck said:

This is the MPX One, very simple and as it only needs a very short movement you use the innermost hole in the servo arm to get max pull from standard 3+kg-cm servo 

Mine failed to release on a 4.5k 3m75 Asw 19 and a 2.5 metal geared servo, on the inner hole and 135°/135° servo throws, good luck with yours.

[Frank Skilbeck]

8 hours ago, Paul De Tourtoulon said:

Mine failed to release on a 4.5k 3m75 Asw 19 and a 2.5 metal geared servo, on the inner hole and 135°/135° servo throws, good luck with yours.

Used a few of them on 1/4 scale gliders inc Pat Teakle HP18 plus a few 1/5 and 1/4 scale woodies. I do use a 3300 mah 5 cell battery though.