EP146 Starting the Exhaust and tidy up loose ends. Fisher Youngster
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- Опубліковано 6 жов 2024
- In the video I start fabricating the exhaust, change the tail wheel springs and show how I do EGT cable crimps on my Fisher Youngster.
My videos are not intended to be instructional for building aircraft or the kit, they are to share how I am progressing and my methods. You may get ideas and tips for building an aircraft. My methods are those I have learnt or developed over time with aircraft, cars and boats. IF YOU USE MY METHOD ON YOUR AIRCRAFT, YOU DO SO AT YOUR OWN RISK. Feel free to comment and give advice or ask questions, I will try to get back to you as soon as I can.
Thanks for going through the way you did the crimping of the EGT probes. Much appreciated and most useful.
No problem. Was it different to your method?
Nice to see the construction of the 'Piccolo' end.
Thanks Robert, it is a bit of fun to make, normally work fairly well and looks fairly nice as well. :-)
Some really interesting stuff there, Algy - I didn't know the dynamics around the piccolo exhaust system. Good progress, keep 'em coming. 👍
Thanks for your kind comments, I will try.
A lot of work and I'm looking forward to hearing what it sounds like. Should be interesting. Regards Michael
I am sure you will get the chance to hear the sound, possibly on the 1st flight (which would be nice if it is this year 🙂).
My friend is welding up my SS exhaust. He's also redoing my engine mount, because the bottom that bolts to the firewall was almost an inch wider than the top!!
Great progress! I'm cracking right along with the first large wing panel. Did some flying yesterday in my Rans. A bit bumpy but nice to get in the air
Sounds great I saw you had a video out on the wings but have not had a chance to sit down to look yet. It is good to get in the air and bumpy is good to get your reactions back after a bit of a lay off and it's just great to get in the air. I don't know about in your area but here it has been 30% windy, 30% rainy, 30% Windy and rainy and the last 10% has been good but I have been at work :-) The ground is water loged so there are few places to fly to but I have taken every opertunity to fly as long as it has been in limit.
@@flyingkub I used to own land with my own airstrip and when it rained hard it would flood the whole strip about 4".....made me want to put floats on my plane, lol
@@jimmyboy163 not been that bad but definitely boggy.
I like the Piccolo pipe effect, and went to one of my references to see examples.
If you can find or borrow a copy of "Firewall Forward" by Tony Bingelis, pages 92 thru 117 covers exhaust systems. Some photos of piccolo holes, on page 101 a steel rod is used to bend a louver effect into the holes.
Looking good!
edit: not sure how my fumble thumbs added the 😅, but I took it out!
I have read that book a goodreference document. The bending of the holes has little effect from my tests on a system back in the 80's so decided not to do it.
Looks cool, but it is a lot of work for little or no effect.
@@riedjacobsen8620It's not that much work, it makes a differance if you look at the sound report on a scope the volumn is reduced admitedly not by a lot about 1 to 2db so about a 1/4 of the volumn, the main benifit is rather than a a very abrupt single shock wave, you get a more plonged event (going by an engineering project I did as an apprentice) which appears to people from a distance to be less noisy and apparently less intrusive. It definently seemed to work on 80's chopper motor cycles 🙂
👍
Thanks as always.
It will be interesting to hear the exhaust... I don't know if I've ever heard an exhaust like that before. Did you consider 4 EGT's? If you only have one per bank will you be worried about not having information for the front vs. the rear cylinders?
The theory is I will have the combined EGT so should either cylinder go ritch or lean the reading will change, as they share the intake manifold, the only way for there to be a problem is ignition or valve (I can easily find out which on the ground). The cyclinder heads are one piece and so the CHT reading is shared as well, if I wanted to get individual EGT and CHT readings I could do that by adding an RDAC onto the MGL Blaze, which would give me 8 more channels but it adds weight and cost, I can't afford.
As an aside there are a fair number of other aircraft that only monitor a cylinder from each bank (not the combined), mainly due to lack of cockpit panel space and not having electronic engine monitoring like the MGL.
Hello, questions on your brake pedals that are installed on the side of the rudder pedals on the floor, how do you intend to operate these ? guess with the hill while controlling the rudder with the tiptoe ? Thanks, rgds
Yes that is the operating method, they are a vertical heel brake system based on a couple of aircraft I have seen in the past. The main thing is that the brakes on this aircraft are really there to aid taxi and engine start and run up and not for dragging the aircraft straight if I run out of rudder on a cross wind landing. As the aircraft is so light, it would be easy to tip it on it's nose, it will slow up fast enough with the drag of being a biplane. On my Kub I have hand operated levers and if I am landing on a short strips I still only use them at the end of the roll out in about 75m (I am not STOL flying, which to my mind needs toe brakes). Thanks for your interest.
love the exhaust. Why go from dual exhaust to single exhaust? won't you get more power out of having each cylinder have it's own pipe?
True but then I would have extra weight for having 4 silencers and the other benefit of joining two cylinders, is I am only using one exhaust gas temp prob to read the average of two cylinders. If I separate ones I would need 4 and an Rdac to read them £££.
@@flyingkub why do u need silencers? does your country require u to have them? If you ran just straight pipes, no need for an exhaust gas temp prob. How many people have that on there experimental when running straight pipes. Is it necessary if running straight pipes to even have those probs?
@@outlawflyer7868 I don't need to make a noise limit but why upset the airfield neighbours and put the field at risk, not everyone loves aviation and lots of airfields are closing. Stub exhausts are not efficient at scavenging the exhaust gases so you loose some power. The exhaust gas temperature probs are needed on this engine to allow me to adjust the fuel mixture in flight, to get a good efficient fuel burn, to increase range and keep the engine internally clean.