You do have resonance at the 2800 rpm. It is either the wing or the camera mount. If the wing I would not run there for any length of time. You will have fatigue failure some where in that wing. I investigated resonances in piping systems at a oil refinery.
It appears to be a simple harmonic oscillation in the camera mount, a frictional dampener can be fashioned to eliminate or mediate the oscillations. Kind of like adding unistrut and clamps to a refinery (or nuclear power plant in my experience) piping design to eliminate resonant frequencies.
Dont forget the wing has No loading on it during these test runs on the ground, I think this is why Peter is saying that during flight he see's no noticible.
Good luck Peter and just keep moving forward with the Raptor project. It’s great to see that the pressure is holding strong in the prop controller... Good luck as you progress again Peter and we’re here with you waiting for your next video. Cheers
@@RaptorAircraft Having taken fluid mechanics myself, you should seriously think that over. B/c this engine is designed for sea level use, the ATM opening is too restrictive. The secondary should be OK, though it's NOT DESIGNED for continuous load. Cars only need short boost, maybe designate a pre-oil cooler for the stock turbo. IMO, the air filter alone should have four (plus) times the surface area of the stock car.
@@cheerdiver What air filter? I think it was removed to allow room for some other air scoop modification. Just has a mesh across the air intake duct now.
@@SwimmingBrambles Hasn't the Icelandic volcano that redirected traffic for months, become active recently? The goal is sweet, mainland US to HI. Dallas Ketchum did it solo in a Rutan Starship. Or at least he wrote a book about doing so on 'ferry tanks', which cause a hint of petro. Scenario: West coast to Maui. Get three quarter way, volcano ash starts pouring into the flight path.
Perfection is the enemy of the good. Keep going Peter and get it flying and ready to work with the California folks to plan for production. Like in software, there are always revisions and improvements.
you might consider adding graphene to all your oils and lubricants. you should test it first. i think you will be shocked at the reduction of friction, and the enhanced ability of mechanical parts to survive lubricant loss.
Glad you finally solved that bearing & governer pressure issue. Now you can move to more flight testing which should go more smoothly. Patience is a prerequisite experimental aviation.
The time tested old ways and materials will win out every time, well done ! :-) Can't wait for you to get back in the air, I am logging hours as your PT 2.
@@RaptorAircraft I would be concerned about the bearing on the new bronze sleeve if they have double oil seals. They will fill up full of oil and could overheat. Normally bearings which could be submerged in oil will only have one oil seal so oil can flow in the bearing. Also you could be back to the issue of the oil seals being forced off the bearing like you have had in the past. Be interesting next time you strip down if the seals are still in place. If one pops out it could eventually get mangled by the main bearings and send bits of debris around the engine again. I would seriously consider removing the seals as gives one less mode of failure.
Will the higher (than steel) thermal expansion of bronze cause the bearings to loosen inside of that bronze bush? Hope this design solves the issues you had...
glad to see the update!! happy to see this bird in the air again!!! glad to see issues worked out!! 1,000,000 attabits!!, would you consider a bullet redrive? why or why not?
@@rustyshackleford7022 I was thinking a multi-hop cross country might be safe and doable. Like no more than 100 miles per leg, but yes, there's that minimum flight hour rule for Experimentals. Raptor must be at least 1/2 way toward the 40hrs by now. Cheers.
I don't know if you are aware of a system for repairing damaged steel shafts called "metal spraying" or "spray welding" it might be of interest to you if you need to repair or are considering replacing the damaged shaft, Abom films on you tube shows how its done
I dealt with on caterpillar mine truck braking parts.I don't like the powdered metal weld spray it machines like crap, is subject to flaking and porosity. A much better process is electro-laser metal powder depositing, much more accurate, bonds better, machines better and has much better durability.
Your wing is acting like one half of a tuning fork. Engine vibration is inducing a resonant frequency - not a good thing, especially for an aircraft. You could tune the wing to move it or just avoid the rpm and prop setting that causes that. If you remember the De Haviland Comet suffered from that which lead to some losses.
@@RaptorAircraft I know more about vibration; not so much about prop wake. So I'm have great difficulty visualizing how a prop can push a wake directly off the tips and produce such an vigorous affect that far from the tip. The few times I've ventured near running prop planes all the air was going back; not radiating out. So call me skeptical on the prop wash hypothesis.
Good on ya Peter! A methodical solution to a material problem. That is one more lesson learned & glad for it! Keep trying! Keep flying! Don’t mind the haters Crying!
You do have resonance at the 2800 rpm. It is either the wing or the camera mount. If the wing I would not run there for any length of time. You will have fatigue failure some where in that wing. I investigated resonances in piping systems at a oil refinery.
He'll have fatigue failure right at/in the camera mount. Good by camera, hello perfectly good plane!
It appears to be a simple harmonic oscillation in the camera mount, a frictional dampener can be fashioned to eliminate or mediate the oscillations. Kind of like adding unistrut and clamps to a refinery (or nuclear power plant in my experience) piping design to eliminate resonant frequencies.
Vibration fequency damper
Isolation of frqueny ranges will show most damaging or distortion area.
Dont forget the wing has No loading on it during these test runs on the ground, I think this is why Peter is saying that during flight he see's no noticible.
True loading a beam will shift the resonant frequency.
Good luck Peter and just keep moving forward with the Raptor project. It’s great to see that the pressure is holding strong in the prop controller... Good luck as you progress again Peter and we’re here with you waiting for your next video. Cheers
Great to hear that things are once again trending in the right direction. 🇨🇦
pretty sure your blade tip speed is supersonic, thats what the noise and vibration is.
Full power looking at my TV I thought my fillings might come out.🤤
Success ! Now what about those Turbos ? Need proper sizing ?
Not going to happen on this bird so you may as well stop asking.
@@RaptorAircraft Having taken fluid mechanics myself, you should seriously think that over.
B/c this engine is designed for sea level use, the ATM opening is too restrictive.
The secondary should be OK, though it's NOT DESIGNED for continuous load.
Cars only need short boost, maybe designate a pre-oil cooler for the stock turbo.
IMO, the air filter alone should have four (plus) times the surface area of the stock car.
@@cheerdiver What air filter? I think it was removed to allow room for some other air scoop modification. Just has a mesh across the air intake duct now.
@@SwimmingBrambles Hasn't the Icelandic volcano that redirected traffic for months, become active recently?
The goal is sweet, mainland US to HI. Dallas Ketchum did it solo in a Rutan Starship. Or at least he wrote a book about doing so on 'ferry tanks', which cause a hint of petro.
Scenario: West coast to Maui. Get three quarter way, volcano ash starts pouring into the flight path.
@@RaptorAircraft Free advice is priceless. This is one crackerjack airplane. Well done.
Ahhh, welcome to the new Bronze Age... our ancestors knew a thing or two about bronze. Bonza bronze.
Perfection is the enemy of the good. Keep going Peter and get it flying and ready to work with the California folks to plan for production. Like in software, there are always revisions and improvements.
The engine sounds different compared with what it replaced.
Now that is a well earned win mate!!!!
SWEET! great job with the bronze peter. looking forward to more air time. nice job man.
With all the changes, will you have to re-start your 40 hour test cycle?
Will these kits be available in 2 years or so?.. about when im a buyer
I'm mostly curious (nearly shocked) to know how you got insurance on that airplane. It's a hell of a time just to get my 1200 hour cozy insured.
check all the loop holes..
you might consider adding graphene to all your oils and lubricants. you should test it first. i think you will be shocked at the reduction of friction, and the enhanced ability of mechanical parts to survive lubricant loss.
Glad to see it running again!
hey! that's great, glad it seems to be working for you. i bet that's a huge relief.
Maybe the resonance will change with wind flow when the wing is loaded.
Its the weak camera gimbal, not the wing itself making the camera to shutter so heavy. No reason for concern.
And not sitting on the gear.
Good news Peter. All the best.
How long does the runway need to be for the Raptor?
Will you insert drilled hex plugs for back pressure in collar or no ?
Well, I thought I made it obvious that it's working as required without any other changes required.
Awesome stuff! Quite boring here without Raptor updates
Great news and good job 👍🏼
Glad you finally solved that bearing & governer pressure issue. Now you can move to more flight testing which should go more smoothly. Patience is a prerequisite experimental aviation.
Congrats Peter, ingenuity and persistence wins the day again!
The time tested old ways and materials will win out every time, well done ! :-) Can't wait for you to get back in the air, I am logging hours as your PT 2.
Good going Peter, another good win. Cheers
Win win situation with that new bronze staff
Graphite impregnated bronze? Or straight bronze.
660.
@@RaptorAircraft I would be concerned about the bearing on the new bronze sleeve if they have double oil seals. They will fill up full of oil and could overheat. Normally bearings which could be submerged in oil will only have one oil seal so oil can flow in the bearing. Also you could be back to the issue of the oil seals being forced off the bearing like you have had in the past. Be interesting next time you strip down if the seals are still in place. If one pops out it could eventually get mangled by the main bearings and send bits of debris around the engine again. I would seriously consider removing the seals as gives one less mode of failure.
Will the higher (than steel) thermal expansion of bronze cause the bearings to loosen inside of that bronze bush? Hope this design solves the issues you had...
So heartening.
Looking forward at more video updates now 👍
Looking good 🙂
glad to see the update!! happy to see this bird in the air again!!! glad to see issues worked out!! 1,000,000 attabits!!, would you consider a bullet redrive? why or why not?
I for one hope you get all of the gremlins out.
I would love to fly my own aircraft------------------------------YOURS!
Sun-n-Fun is this weekend I think. Lots of GA UA-camrs will be there. Many are looking fwd to seeing Raptor in person. Hint Hint. 😋🍻.
@@rustyshackleford7022 I was thinking a multi-hop cross country might be safe and doable. Like no more than 100 miles per leg, but yes, there's that minimum flight hour rule for Experimentals. Raptor must be at least 1/2 way toward the 40hrs by now. Cheers.
Great stuff, Peter - knew you'd sort it.
Seems to me you are getting more free advice than you can use. This is one remarkable airplane
Great news "congratulations" the job is done and soon you'll be in the sky, thanks for the update and tuning for the next update.
Whats the range on it ::
Fantastic
I don't know if you are aware of a system for repairing damaged steel shafts called "metal spraying" or "spray welding" it might be of interest to you if you need to repair or are considering replacing the damaged shaft, Abom films on you tube shows how its done
I dealt with on caterpillar mine truck braking parts.I don't like the powdered metal weld spray it machines like crap, is subject to flaking and porosity. A much better process is electro-laser metal powder depositing, much more accurate, bonds better, machines better and has much better durability.
Great news!
Looking good Peter!
Well done!
Wow! Posted 4 minutes ago, I wasn't subbed and just finished building a very similar lego build and wanted to show my son. What timing!
I am sure it happens all the time but I don't think I've ever seen a plane running with no one in it.
Ah, yeah, some people hand prop their plane to start it. It's difficult to do while sitting inside.
Your wing is acting like one half of a tuning fork. Engine vibration is inducing a resonant frequency - not a good thing, especially for an aircraft. You could tune the wing to move it or just avoid the rpm and prop setting that causes that. If you remember the De Haviland Comet suffered from that which lead to some losses.
The wing isn't vibrating. The gimbal in the camera is being affected directly by the prop wake.
@@RaptorAircraft Thank you for clarifying that for others! Great work Peter.
@@RaptorAircraft Well, now they have nothing whatever to grumble about. Shame on you.
@@RaptorAircraft I know more about vibration; not so much about prop wake. So I'm have great difficulty visualizing how a prop can push a wake directly off the tips and produce such an vigorous affect that far from the tip. The few times I've ventured near running prop planes all the air was going back; not radiating out. So call me skeptical on the prop wash hypothesis.
@@Digital-Dan -- Oh, they'll always find something to gimbal about. 😀
Yay
Good on ya Peter! A methodical solution to a material problem. That is one more lesson learned & glad for it! Keep trying! Keep flying! Don’t mind the haters Crying!
Looks like a significant improvement. t'll be a Swiss watch yet.
Looking forward to seeing you in the air again soon!
Awesome!! One day closer to a Raptor darkening my hangar floor! 😀
First..🤠
First! Yay