Search found 229 matches

by Steve Perry
September 27th, 2020, 8:03 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

I have run into a few issues that are delaying things, I have mislayed some components ( I suspect my wife has put them somewhere ), and have replacements on order, some components arrived with illegible labeling and have become mixed with others with illegible labeling for other projects, a compone...
by Steve Perry
September 21st, 2020, 6:13 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

If you are wondering what the stencil is for then this video shows and explains things
https://www.youtube.com/watch?v=qyDRHI4YeMI
by Steve Perry
September 20th, 2020, 6:46 pm
Forum: General Discussion Topics
Topic: Impending balsa shortage.
Replies: 2
Views: 268

Re: Impending balsa shortage.

A long way from how we originally got Balsa, I remember reading in a book by Vic Smeed that it was used to build rafts to float bananas down the river and then sold cheaply as a by product.
by Steve Perry
September 20th, 2020, 5:41 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

Here is the breadboard lash up :) Bottom left the battery box, the white wire above it is servo power that bypasses the regulator board on the left. The 3 blue things are the adjusters for temperature and servo travel end points. Right hand size is an Ardino Nano and bellow it the 2 line display tha...
by Steve Perry
September 15th, 2020, 9:52 pm
Forum: For Sale or Wanted
Topic: Wanted Zenoah g62 cylinder
Replies: 6
Views: 688

Re: Wanted Zenoah g62 cylinder

by Steve Perry
September 14th, 2020, 9:46 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

The PCB's arrived last week, I now have to find the time to take some photos of the breadbord lash up, unboxing the PCB's, solder them and of the assembled board :) Slight change to the amount of servo travel, it was from 90 degrees adjustable up to 120, it will now be 90 degrees +/- 5 at each end o...
by Steve Perry
September 8th, 2020, 11:10 pm
Forum: Your New Projects
Topic: Convair YF2Y-1 Sea Dart
Replies: 279
Views: 61082

Re: Convair YF2Y-1 Sea Dart

Will you be installing any form of bilge pump ?
Another thought is will you be adding any "buoyancy", typically large pieces of expanded polystyrene sufficient to stop it sinking should the worst happen ?
by Steve Perry
August 20th, 2020, 10:32 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

[url][/url]PCB's ordered via 1st class mail, the extra 10 quid for DHL would get a customs charge on them, yes folks HM Revenue & Customs include the shipping cost, buy something for a fiver and pay express shipping and it may put you over the limit :( The limits are £15 inc shipping unless sent...
by Steve Perry
August 3rd, 2020, 10:15 pm
Forum: Electric Stuff
Topic: Temperature operated cowl flaps
Replies: 5
Views: 1947

Re: Temperature operated cowl flaps

That instructables example is very basic and equivalent to replacing the potentiometer on a servo tester with a thermistor, no set end positions or anything.
by Steve Perry
August 3rd, 2020, 9:52 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

I had a play with the code tonight and will test it Friday, my furlough is ending so I have less time to spend on this. If the code works correctly then the next step is to build the same circuit on a 2nd breadboard using the actual chip and components that will be used in the finished project. This...
by Steve Perry
July 14th, 2020, 12:16 am
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

It's not quite going to plan on the plumbing side due to the required part is not available :( Getting back to the topic, it will be easier if if the opening depends on how much above the set temperature that the sensor is:) Working on about 100 degrees of servo travel then I can scale 50 degrees ab...
by Steve Perry
July 7th, 2020, 10:19 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

Work on this is on hold for a few days due to having to urgently relocate some plumbing and electrical stuff in the house :(
Normal service should resume at the weekend once finished:)
by Steve Perry
July 6th, 2020, 11:43 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

The new code works on how any degrees above the set temperature to control the amount of opening of the flaps, the sensor that I am working with has a max rating of 125C. I may need to change to a higher rated sensor but at 200C solder begins to melt :( The current sensor costs £1 for 5, the higher ...
by Steve Perry
July 4th, 2020, 3:49 pm
Forum: Technical Help required
Topic: prop rotation electric twin
Replies: 7
Views: 818

Re: prop rotation electric twin

The twin Mustang was one of them https://aviation.stackexchange.com/questions/12979/why-did-upward-turning-propellers-in-the-f-82-twin-mustang-cause-a-loss-of-lift Edit, I was told by the crew of an A400 that the contra arrangement of the engines produced more lift. So the other way around would pro...
by Steve Perry
July 4th, 2020, 8:39 am
Forum: Technical Help required
Topic: prop rotation electric twin
Replies: 7
Views: 818

Re: prop rotation electric twin

Try both options as one may work better. There was at least one full size aircraft that flew poorly until they swapped the engines over and then it flew like a dream.
by Steve Perry
July 3rd, 2020, 8:16 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

Today's added feature is some spark suppression on the wires to the temperature sensor that will be in a very sparky area, something with the complicated sounding name of a "Common Mode Choke". What it actual does is if a spark puts a spike on both wires like ____|____ then it turns one up...
by Steve Perry
July 2nd, 2020, 7:51 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

All functions are now working :) Adding the LCD display made it run dog slow with the servo ticking 1 degree per second, operating an override switch gave an instant full open but requiring a full minute to return to the prior position so I will not include an optional temperature display in the cur...
by Steve Perry
July 1st, 2020, 9:23 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

Youtube just gave me this video that may be helpful https://www.youtube.com/watch?v=8OmJISrSo-Q
by Steve Perry
July 1st, 2020, 8:00 pm
Forum: For Sale or Wanted
Topic: Wanted,Temperature operated cowl flaps
Replies: 60
Views: 4909

Re: Wanted,Temperature operated cowl flaps

I put the circuit together on a breadboard today with an Arduino nano, connected everything and started testing, it almost worked as advertised except for the override switches (a coding error), and the face palm after an hour of trying to get the servo to move due to not having the power to it turn...

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