VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > RV Firewall Forward Section > Alternative Engines
Register FAQ Members List Calendar Today's Posts

Reply
 
Thread Tools Search this Thread Display Modes
  #21  
Old 11-19-2015, 05:59 AM
DanH's Avatar
DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 9,500
Default

Quote:
Originally Posted by singoldsby View Post
Just thought I would put a pic of my cowl on here so everyone is aware of my intake set up. This of course is before any cowl mods. I intend to add vents and duct work if needed.
Yep, those are attractive cowls.

Can you describe, or even better, sketch what you have in mind for cooling mass flow?
__________________
Dan Horton
RV-8 SS
Barrett IO-390
Reply With Quote
  #22  
Old 11-19-2015, 06:43 AM
rv6ejguy's Avatar
rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,766
Default

The cowl and rad setup is the same as the other two Powersport RV8s used way back when. They never said anything about cooling issues. Huge rad, not so efficient but certainly looks great from the outside and hopefully works as well as the other ones.
__________________

Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 441.0 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi2.htm


Reply With Quote
  #23  
Old 11-19-2015, 07:55 AM
shodges shodges is offline
 
Join Date: May 2011
Location: Dawson Springs, KY.
Posts: 4
Default

I currently fly a 7A with a Renesis, RD1C redrive, with a EC2 controller. I tried your current cooling installation but with enough differences in my installation that I cannot give a positive or negative reply, but I had to change to a different cooling installation due to high oil temps.
I do agree with the other comments about your current fuel pump location. I did suffer a situation with vapor lock and had to redesign my fuel system.
It did take some time to work out the bugs but I thoroughly enjoy the aircraft now and even flew it to Oshkosh this year.
PM me if you would like to know more about my install, I'll help where I can.
http://s1204.photobucket.com/user/sa...y/?view=recent
Reply With Quote
  #24  
Old 11-19-2015, 12:09 PM
rv6ejguy's Avatar
rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,766
Default

Quote:
Originally Posted by shodges View Post
I currently fly a 7A with a Renesis, RD1C redrive, with a EC2 controller. I tried your current cooling installation but with enough differences in my installation that I cannot give a positive or negative reply, but I had to change to a different cooling installation due to high oil temps.
I do agree with the other comments about your current fuel pump location. I did suffer a situation with vapor lock and had to redesign my fuel system.
It did take some time to work out the bugs but I thoroughly enjoy the aircraft now and even flew it to Oshkosh this year.
PM me if you would like to know more about my install, I'll help where I can.
http://s1204.photobucket.com/user/sa...y/?view=recent
Clean looking install and airframe. Nice!
__________________

Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 441.0 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi2.htm


Reply With Quote
  #25  
Old 11-20-2015, 05:47 AM
singoldsby singoldsby is offline
 
Join Date: Nov 2015
Location: benton
Posts: 12
Default

Very nice Sam, thanks for the input and i sent you a pm. Looking forward to maybe lining up with you on the flight line at Oshkosh one day...
Reply With Quote
  #26  
Old 11-20-2015, 07:08 AM
DanH's Avatar
DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 9,500
Default

Quote:
Originally Posted by rv6ejguy View Post
The cowl and rad setup is the same as the other two Powersport RV8s used way back when. They never said anything about cooling issues. Huge rad, not so efficient but certainly looks great from the outside and hopefully works as well as the other ones.
Ahh, but that's the thing...I have no idea what the other two Powersport RV8's looked like under the cowl. As for "never said anything about cooling", well, that's a little like sex and bank accounts...sometimes folks don't tell all

I'm guessing the Powersports have a cooling flow like the top sketch, and Sam's revised system is like the bottom sketch?

__________________
Dan Horton
RV-8 SS
Barrett IO-390
Reply With Quote
  #27  
Old 11-20-2015, 07:42 AM
Tomcat RV4 Tomcat RV4 is offline
 
Join Date: Nov 2007
Location: Jacksonville,Fl. 32246
Posts: 270
Default

Ross at Simple Digital Systems has RV6 with Turbo Subaru, and have done extensive air flow testing and built under fuselage mounted radiator (similar to P51)..He has constructed very nice fiberglass inlet and outlet ducts ,and as a result I am in process of duplicating his approximate dimensions out of aluminum for cooling my RV 4 with Subaru 2.5 .I am very poor at fiberglass, but may get better as I finish my cowl....Tom
__________________
Tomcat RV4
RV4 gone to RV heaven !building Zenith 701
dues paid and worth every penny
Life is uncertain -Eat desert first !
U F O Member since Dec 2017
Reply With Quote
  #28  
Old 11-20-2015, 11:22 AM
rv6ejguy's Avatar
rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,766
Default

Quote:
Originally Posted by DanH View Post
Ahh, but that's the thing...I have no idea what the other two Powersport RV8's looked like under the cowl. As for "never said anything about cooling", well, that's a little like sex and bank accounts...sometimes folks don't tell all

I'm guessing the Powersports have a cooling flow like the top sketch, and Sam's revised system is like the bottom sketch?

I saw photos of the Powersport installations before their site vanished. One of the Powersport RV8s flew off at Van's against a Lyco powered one and outperformed it slightly if I recall at the expense of more fuel burned during the flyoffs. I'd love to re-read the RVator article as it's been a while and I don't recall all the details.

True, it was hard to find a lot of info about them outside of the RVator article and Powersport's website. The PS RV8 completed the flyoff so it must have cooled ok at least. With such large rad volumes, inlet area and not many other places for the air to go (assuming minimal clearance air and leaks), it might work similarly to Belted Air's similar setup for their V6 Chevy, both are in the same power class roughly. A bit draggy but effective.

I have read where many Rotary guys have had oiling cooling issues and spent more time solving those than water cooling ones.

Love the looks of these cowlings on RVs.

You Rotary guys have any performance numbers you're willing to share?
__________________

Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 441.0 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi2.htm



Last edited by rv6ejguy : 11-20-2015 at 12:15 PM.
Reply With Quote
  #29  
Old 11-20-2015, 03:21 PM
dlomheim dlomheim is offline
 
Join Date: Sep 2006
Location: (2OK2) OK City, OK
Posts: 381
Default Rotary RV

Quote:
Originally Posted by singoldsby View Post
Here you go. Just a couple as I will post more as I progress towards ground ops. .

http://postimg.org/gallery/2i6lo35h6/
Neat installation! I look forward to seeing more photos in the future! On my 13B installation (RV-9A), I have a large water radiator I'm using, which should have excess BTU's to shed; so I am also installing a water / oil intercooler. Oil cooling has generally been the big issue with rotaries; so I am plumbing the hot oil coming from the engine and running it right into the water/oil intercooler to drop the temps a bit; and then will run it through the stock Mazda air/oil cooler, prior to running it back into the engine. I'm hoping my first flight won't have any oil cooling issues...

Doug

RV-9A / 13B FWF

Last edited by dlomheim : 11-22-2015 at 02:16 PM.
Reply With Quote
  #30  
Old 11-20-2015, 03:41 PM
dlomheim dlomheim is offline
 
Join Date: Sep 2006
Location: (2OK2) OK City, OK
Posts: 381
Default

Quote:
Originally Posted by rv6ejguy View Post
You Rotary guys have any performance numbers you're willing to share?
Sam will have some numbers to share no doubt...

Tracy Crook has a three rotor RV-8, and I think he once said he was seeing something like 3,700 fpm initial climb rate, and he has to watch his power at cruise to avoid exceeding VNE. I don't have access to my home computer where all my rotary data is kept; so maybe Charlie England can provide some of the hard numbers that Tracy has reported over the years with his "4" and "8"...

Doug

RV-9A / 13B FWF
Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 06:22 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.