EDGE performance - first start fuel injected turbo rotax RANS S-7S | This thing is gonna rip!

[@leeadams5941]

Excellent channel, please do not change it, its perfect now

[@daniellamfers4118]

Enjoyed this very much. Nice detective work on the boost problem! Am hoping the Edge guy's project is an intercooler that'll fit under the cowl without bulky protrusions.

[@ManieRossouw71]

Very nice video Todd. Great technical information.

[@lesb3481]

Great video! I look forward to seeing your first flight with the new system.

[@bennietipton2820]

Thanks for doing the work involved in making your videos they are very helpful and I feel you on the hair cut deal

[@chrisberg4952]

LOve the Sound of thAT Engine.

[@prof.heinous191]

You're keeping to an amazing schedule, what with the day job, film making and the virus/post. Glad also Edge is seeing your worth, and you're about to become one of their test pilots!

[@GravityKnightFlying]

thank you my friend.. it's been a busy couple weeks for sure!! appreciate you recognizing that

[@nobodynothing9950]

That's awesome you have access to the old machine shop. I'm a machinist for GE Aviation now...unfortunately now with the forced lockdowns business is awful... but I used to work in the small job shops on old machines and I miss it.

[@nobodynothing9950]

btw...I live on the east coast and love the video of all the mountains and canyons. Beautiful landscape. Glad you share it.

[@GravityKnightFlying]

thanks for the comments.... real sorry to hear.. these lockdowns have really wreaked havoc...

[@nobodynothing9950]

@@GravityKnightFlying Yeah...so far I've survived 3 layoffs and I think another is coming. Businesses just aren't putting employees on planes. But when I was furloughed I found the flying cowboys here on you tube to entertain myself. You tube recently connected me with your channel. I like the places you video. Keep up the good work. Maybe one day I could buy a plane and fly out there. In the mean time, hopefully I get to keep machining jet engine parts.

[@GravityKnightFlying]

@@nobodynothing9950 thank you.. I hope so...

[@rjbishop12]

Todd- WOW, so cool to see this coming together. I really enjoyed seeing all the detail you covered- the video didn't feel long at all. Thanks for putting the effort to show all your challenges and successes!

[@Herofromzer0]

İm old rc guy the servo you showed is brushed old school potas servo. These servos makes to much distortion in vibrated situations you can easly see servo arm moves un intentionally. Find good brushless servo to resolve un wanted movement. Sail winch servos works well for your purpose.

[@TheSpeedsta]

As always a great informative video. Good job 👍

[@jeremybeckman1296]

Sounds great man. I’ll be starting my 915 kitfox hopefully within a month up at meadowlake.

[@GravityKnightFlying]

oh dang! ... keep me posted! like to see that sometime when you get going on the project.... can contact me through the about page on here if you want and we can link up down the road etc.

[@jeremybeckman1296]

I have a Facebook group for my build N927AK. Check it out when you get a chance.

[@davidrobins4025]

Great content. Thanks.

[@applemagnet633]

Around 12:00 The flightschool I go to has a Sling 2 with the 914UL Turbo in it and it has the same issue of the manifold pressure "hunting". Always fluctuating for some reason and can't find the issue...

[@GravityKnightFlying]

Might be worth changing out the Servo. I'll cover some more of this sometime.. I bought a few spares, and changed mine just to try something after the footage in this video.. interesting results (made a slight difference). But, they can do some weird things... even if the gear teeth are intact. Not sure if the flight school can do this, but you can get them used cheap on ebay... they came on GSXR crotch rockets, 600's 750's and the 1000 all I believe. There was a Kawasaki that had it too.. used on the exhaust system. They are like $15-50 on ebay. EXACT same part, mine the bike units have a slightly different wheel that drives the cable on them, have to change it. easy to do. They are $500 new from rotax!

[@todd-617]

LOL Todd, I'm with you on the hair cut thing. I'm starting to look like Tom Hanks in Castaway.

[@HookedOnUtah]

Love it! Great Video!! You could contact Steve Henry and discuss his custom header tank for the Yamaha 300ti, not sure it that would work for you, it's a 5 gal tank.

[@earthrootshealing2666]

Awesome !!!

[@chrisjamison376]

Enjoy learning about Edge! Oh I STOL your idea on headset hanger. Actually had some for hunting!

[@ShadowAviator]

Hopefully this Covid-19 deal comes to an end soon, so we can get some fly-ins going again. I want to see your new bird in person.

[@GravityKnightFlying]

im with you on that man 👍

[@Birddog66]

what is the material used for the Instrument panel? How do you achieve that look?

[@markstoll9636]

hi Ive only flown a 152, 150 and a 172 in my total 230 hours. i am soooooo close to buying a kit plane. would you describe flying your plane as a nimble machine kinda like a go cart?

[@GravityKnightFlying]

Thats a pretty good way to describe it Mark. The S6 I had before this with it's short speed wing was an extremely nimble, responsive, machine. This S7 isn't quite as nimble as that was, but when compared to the 150/170 sized planes, the 7 is more agile no questions asked. Especially compared to the 170/172. You can really get down and carve some canyons and such with a plane like this (of course, check for wires and obstructions first always!)

[@jjohnston94]

I've been thinking of building an S7 for a long time, and my home field is at about the same elevation as yours. So the important question for me is: Do you need the extra power for this altitude, or do you chase power for the fun of chasing power?

[@dustindickerson]

What kind of Intake temps are you seeing? Not a lot of room under your cowl. Edge should run a fuel injector in charge tube. It will really bring charge temps down.

[@GravityKnightFlying]

it's shooting up pretty fast... being at almost 7000ft on the ground doesn't help... it hits 150deg f in about 40 seconds on a warm day like today (flew it today for the first time).... going to need an intercooler....

[@dustindickerson]

@@GravityKnightFlying Did moving your intake and filter to the inlet of your cowl help lower intake temps?

[@GravityKnightFlying]

@@dustindickerson I built that setup, but it had one on it that was similar when I got it (samller tube, smaller filter). So I don't have much to compare it with, but I do believe it would be a fair bit hotter if the filter was down on the turbo. The S7 cowl is tight.. even though the radiator is at the bottom and wouldn't be introducing hot air to the filter on the turbo, the cylinders would be. My old bird would run around 15-20 degrees hotter inside the cowl than outside temps iirc, and it was pretty open to airflow.

[@shanerawlins2836]

What are the other planes in the hangar? Are they yours? Really enjoy your videos man

[@GravityKnightFlying]

56 helio courier, 48 (I think) stinson 108-3, and a cherokee 140 .. they are not mine, friend of mines collection.. thanks!

[@DIYPackraft]

How did having no vent line from your header tank work out? I’ve heard that it’s normal for bubbles to come in from the return line - has that caused any issues for you?

[@GravityKnightFlying]

So I started out with just the two feed lines running to each wing tank, and it worked. But it was a real pain to get the tank to initially fill. Had to loosen a fitting and let the air out.. once it was filled, and primed, it would run without running out of fuel. But quickly after thinking this through, I decided I didn't want to be reliant on this. Not that it should ever run down that low (header is only 2 gal)... but if it happened, it would be a pain out on the "road" to have to re-prime the system etc. I figured some kind of vent tube would be a good idea...I beefed up the top corner of the header tank and drilled and tapped a 1/8 npt fitting with a smaller line that runs up to one of the rear tank feed lines (each tank has 2 lines, so 4 total feeds). It splices into that feed line up high inline with the tank. It's all up hill through this line, no low spots. As soon as I installed this line, it would fill the header tank immediately when filling from the wing tanks.. problem solved. I feel better with this setup as now it seems to purge air out instantly. And if the system is ever run down into the header, there are no issues filling it up. I wasn't sure if it would work with the vent tied back into one of the feeds.. but it has worked great for ~500hrs or whatever it's been. And the tanks seems to feed pretty evenly.. thx

[@DIYPackraft]

@@GravityKnightFlying Cool - that is great to know. Thanks for the detailed answer!

[@portnuefflyer]

I had not noticed the VG'd vert stab before on your new bird. Came that way, or did you do it on your 6 also?

[@GravityKnightFlying]

I did the 6, and 7 both ... can't say it made any difference on either one!!

[@Clif_Brown]

@GravityKnightFlying why no intercooler with your Rotax EDGE performance engine install? I've seen other EDGE kits like this with intercoolers on airplanes.

[@GravityKnightFlying]

I built an IC and installed it later. This was on a stock 914 engine, once i went to the full edge motor, I built the IC to make some more power etc. at the power boost on the stock engine it worked ok with no IC….

[@Clif_Brown]

@@GravityKnightFlying thanks for the info! Great videos and cool EDGE engine install!

[@JSBIRD69]

Dude! Good to see you getting that system worked out! However, I didn't understand everything you said. Would you mind making another video, but speak slower this time? 😀

[@charliethorp996]

Uhhh my brain hurts now! Jk, very cool video man, had no idea you were that deep into it. Thank God you don’t have my attention span!

[@markellars9245]

Hello What and where is the header tank?

[@lesb3481]

The header tank, is a small fuel tank that usually holds a gallon or two of fuel. The wing tanks feed into the header tank and then the header tank supplies the engine. The primary purpose for a header tank, is to keep from losing power if a wing tank pick up un-ports during high angles of attack and/or bank and introduces air into a fuel line. The header tank is usually(but not exclusively) located directly behind the aft cabin bulkhead inside the tail of the aircraft.

[@kcpumpguy]

Great job! Had to be satisfying when she fired up. One thought. As I've mentioned in previous comments I'm installing an 912IS in my S7. The Rotax install manual makes a very big deal about having adequate venting for the header tank. Also, you might watch this video about installing at 912is in a Zenith. kzbin.info/www/bejne/iqu3mpiMZaqpibs The Rotax guys make a very big deal about header tank venting. Both the manual and the video are worried that any air that gets introduced into the system and can't get out could cause fuel stoppage. They talk about "cavitation bubbles" possibly building up in the header tank. I'm not sure I can see how that could happen, but I've installed a dedicated AN-6 line for a vent. It goes from the top of the header tank to the top of one of the wing tanks and gives a path for the air to get out. Easy to install and crosses that particular worry off the list. Can't wait to see the beast fly! Great job

[@GravityKnightFlying]

I'm not sure I won't end up having to do something like that. I think the issue is the lines dipping down below the tank and then back up to it. My last bird I installed a header tank, and the lines just dropped down to it from the wings, never had an issue, didn't have to do anything to fill it etc. I'm kicking my self for not welding in a couple more ports so I could easily try somethings now! But it could be done of course... thanks for the info btw

[@kcpumpguy]

@@GravityKnightFlying If you read the 912is install manual and watch that video, what they are worried about is cavitation bubbles. Cavitation is more likely at high elevation and hotter temperatures, so you might not think you have a problem until it crops up on a hot day and a takeoff at high elevation (something you like to do!). The 912is and the Leading Edges system use high capacity electric fuel pumps that supply way more gas than the engine could ever use. It's the relatively large amount of fuel that's making the loop from the header tank to the engine, then back to the header tank that apparently can create a large quantity of cavitation bubbles. So this is an issue that's directly related to electronic fuel injection, not so much with carbs. If your system won't purge the air out of the header tank, I think I'd be a bit worried about it. From what I'm reading electronic fuel injection can introduce bubbles and they need a way to get out. Anxiously awaiting your next video, you've rapidly become my favorite KZbin channel.

[@GravityKnightFlying]

@@kcpumpguy thanks man!! interesting issues you bring up... I put about 8-9 hours on the setup (half on the ground, half in air), but ended up making a change (it had not had a problem... yet!!). I was also nervours about it not taking fuel, and also just the pain it is to re-bleed if ever ran low and introducing air again. I drilled and tapped and put a fitting in the corner of the tank, then tied that back into one of the 4 lines going to the wing tanks up high where the air should be able to escape back through that line and out the vent. It seems to be working well like this - flown it several times now and staying primed etc. I appreciate the input as I'd rather play it safe on a deal like this!

[@kcpumpguy]

@@GravityKnightFlying Great! I know a lot about pumps and cavitation (see my callsign) and I'm not sure I really buy the cavitation bubble hypothesis. But there are so many places I've run into that make a big deal about venting the header tank that I think there must be something to it. That's why I've put in a dedicated vent line, and I'm glad you did too. It's one of those things that's easy to do and the results of not doing it could be serious. Happy to hear that you've flown it. Can't wait to see the video.

[@sergeyapalkov2688]

Нихрена ничего не понял...- но ты молодецЪ.