Elite Aerosports Shockwave?
12-04-2014, 08:30 AM
#80
Rcpete, I have to ask... Why all the vent holes in your nose door - function or aesthetics? I somewhat get the triple air cylinders because the tiny BVM ones don't always keep large doors fully shut.
Just curious...Scott
Just curious...Scott
12-04-2014, 04:18 PM
#83
Join DateNov 2004LocationDnipropetrovsk, UKRAINEPosts254GalleryMy GalleryModelsMy ModelsRatingsMy FeedbackRE: How Many Fly Eagle Jets (FEJ) pipes have failed? 26 so far & counting
Friends,
I have made measurement of speed between an external and internal contour....
The interesting I have obtained the data!
Look drawings...
At first the distance between contours was 10mm (0.397) "speed of pass of cooled air there were 9 metres (354.33)" in a second.
But when I have increased it the size on 15 mm, speed of pass of air has increased to 21 metres (856.77) "in a second...
Difference of all - 5 mm (0.196)"
I repeat: speed of air between contours! Not in an internal pipe!
This data for the information
A lot of cooling is done, between the inner and outer pipe, (see first paragrath on the amount) and if bypass air is not introduced, then no cooling will happen, the air just does not magically appear, thus the slots in the nose door, plus a intake/opening vent on the bottom of the fuse.I guess thats why in all my jets, I have never had a issue with my pipes.
Rcpete
I have made measurement of speed between an external and internal contour....
The interesting I have obtained the data!
Look drawings...
At first the distance between contours was 10mm (0.397) "speed of pass of cooled air there were 9 metres (354.33)" in a second.
But when I have increased it the size on 15 mm, speed of pass of air has increased to 21 metres (856.77) "in a second...
Difference of all - 5 mm (0.196)"
I repeat: speed of air between contours! Not in an internal pipe!
This data for the information
A lot of cooling is done, between the inner and outer pipe, (see first paragrath on the amount) and if bypass air is not introduced, then no cooling will happen, the air just does not magically appear, thus the slots in the nose door, plus a intake/opening vent on the bottom of the fuse.I guess thats why in all my jets, I have never had a issue with my pipes.
Rcpete
Last edited by rcpete347; 12-04-2014 at 04:41 PM. Reason: More info
12-04-2014, 06:48 PM
#86
My Feedback: (57)
Pete,
You don't have to worry with either the Tam pipe or "stock" pipe supplied. I'm running the Tam pipe with not one cooling hole any where, no issues at all.
Also, I thought the Venturi effect at the rear of the pipe was the major contributor to pipe cooling by "pulling" air between the inner & outer pipes, not the air being "pushed" from the front.
You don't have to worry with either the Tam pipe or "stock" pipe supplied. I'm running the Tam pipe with not one cooling hole any where, no issues at all.
Also, I thought the Venturi effect at the rear of the pipe was the major contributor to pipe cooling by "pulling" air between the inner & outer pipes, not the air being "pushed" from the front.
12-04-2014, 07:16 PM
#88
My Feedback: (57)
Oh, if you're meaning cooling for the rear of the fuse from the pipe, then again, I haven't experienced any problems in that area either.
I don't think anyone (or at least me) is saying it's wrong or bad, just not really necessary here, but does look a little cool. It's definitely your preference and that's all that matters in the end. You'll love the Shockwave for sure!! Good luck with the maiden and I'm sure I'll see it sometime.
I don't think anyone (or at least me) is saying it's wrong or bad, just not really necessary here, but does look a little cool. It's definitely your preference and that's all that matters in the end. You'll love the Shockwave for sure!! Good luck with the maiden and I'm sure I'll see it sometime.
12-04-2014, 07:31 PM
#89
So Pablo, are you and Scott going to look into this possible issue? Mine is at my builders and I think he's going to be starting on it this month. He and his friend have lots of experience with jets including bypass setups as his friend was a rep for BVM for a long time. I'm going to be asking him what he thinks about extra cooling air for a model with a bypass setup.
12-04-2014, 07:57 PM
#91
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FWIW, my shockwave has 5 flights on it - Mammoth for power - plenty of hand checking for heat in all of the preflight and postflight stages. Runs as cool as, or cooler, than any of the other jets I've had or assisted with...
Honestly the biggest air issue I see with Petes pics are the BV valves for the retracts
Honestly the biggest air issue I see with Petes pics are the BV valves for the retracts
Last edited by smitty1001; 12-04-2014 at 08:01 PM.
12-04-2014, 08:17 PM
#93
Our system runs very cool. no heat issues at all. we have a very large inlet area, a large bypass, and a large diameter fuselage. The tailpipe works as designed and the system is very cool. My tailpipe still looks like new after a hard season of flying with a K210!
I have had airplanes that got hot, but the Shockwave is not one of them. the only area that gets a little warm is the last 1/3 of the bypass and why we recommend heat shield to that area. Our bypass is very lightweight and heatshield protects it longevity.
I never even worry about cooling down my Shockwave. I used to use a blower on other jets I have owned to get the hot air out. Never an issue with Shockwave.
A naca duct will introduce more air, but not necessary in this application. the large inlets never struggle for air and the fuselage on the Shockwave is much larger than the jets pictured above. lots of area around turbine and tailpipe.
Our setup works perfect. no worries!
Scott
I have had airplanes that got hot, but the Shockwave is not one of them. the only area that gets a little warm is the last 1/3 of the bypass and why we recommend heat shield to that area. Our bypass is very lightweight and heatshield protects it longevity.
I never even worry about cooling down my Shockwave. I used to use a blower on other jets I have owned to get the hot air out. Never an issue with Shockwave.
A naca duct will introduce more air, but not necessary in this application. the large inlets never struggle for air and the fuselage on the Shockwave is much larger than the jets pictured above. lots of area around turbine and tailpipe.
Our setup works perfect. no worries!
Scott
12-04-2014, 08:35 PM
#94
So Pablo, are you and Scott going to look into this possible issue? Mine is at my builders and I think he's going to be starting on it this month. He and his friend have lots of experience with jets including bypass setups as his friend was a rep for BVM for a long time. I'm going to be asking him what he thinks about extra cooling air for a model with a bypass setup.
Pablo
12-04-2014, 09:05 PM
#96
If there was an issue we would solve it immediately. Not the case here. Pete preference was to open up holes on his now weak nose gear door. Zeeb enjoy your model and build as recommended I have countless hours flying and testing the Shockwave. I have personally have +assembled 10 in the manner we suggest.
Pablo
Pablo
12-05-2014, 07:17 AM
#97
Our system runs very cool. no heat issues at all. we have a very large inlet area, a large bypass, and a large diameter fuselage. The tailpipe works as designed and the system is very cool. My tailpipe still looks like new after a hard season of flying with a K210!
I have had airplanes that got hot, but the Shockwave is not one of them. the only area that gets a little warm is the last 1/3 of the bypass and why we recommend heat shield to that area. Our bypass is very lightweight and heatshield protects it longevity.
I never even worry about cooling down my Shockwave. I used to use a blower on other jets I have owned to get the hot air out. Never an issue with Shockwave.
A naca duct will introduce more air, but not necessary in this application. the large inlets never struggle for air and the fuselage on the Shockwave is much larger than the jets pictured above. lots of area around turbine and tailpipe.
Our setup works perfect. no worries!
Scott
I have had airplanes that got hot, but the Shockwave is not one of them. the only area that gets a little warm is the last 1/3 of the bypass and why we recommend heat shield to that area. Our bypass is very lightweight and heatshield protects it longevity.
I never even worry about cooling down my Shockwave. I used to use a blower on other jets I have owned to get the hot air out. Never an issue with Shockwave.
A naca duct will introduce more air, but not necessary in this application. the large inlets never struggle for air and the fuselage on the Shockwave is much larger than the jets pictured above. lots of area around turbine and tailpipe.
Our setup works perfect. no worries!
Scott
Danno
12-05-2014, 12:46 PM
#99
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Folks this all boils down to personal preference. Some folks, like Pete, tend to modify things to their liking and it isn't based on any testing but rather their instinct. No problems there. We provide a recommended build and as such, Scott's personal fleet of Shockwaves, Pablo's Shockwave and the two I have owned have NEVER had an issue. Trust that if we feel there is something to be improved on and, in the end allow us to provide a better product, we WILL do it. Until then, enjoy your "stockwaves"!
12-05-2014, 01:25 PM
#100
