Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Fuel Flow Test

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> RV10-List
View previous topic :: View next topic  
Author Message
Ed Godfrey



Joined: 05 May 2009
Posts: 47

PostPosted: Sun Aug 23, 2020 5:14 pm    Post subject: Fuel Flow Test Reply with quote

RV10 builders/flyers,
    I am pondering the fuel flow test as outlined in AC90-89B, Section
11, Par 1-19.e(1). For those of you who may have performed these tests,
what climb angle did you use and how did you obtain it. I did a test
with weighing down the tail and the best that I could get was about 12
1/2 degrees when the tail tie down hit the hangar floor. I am thinking
about raising the main gear off of the floor, but was not sure as to
what height would work out the best. I did place a call to Van's to see
if they had a "standard" of unuseable fuel for the RV10, but the reply
that I received was that it was up to the builder to determine that.
Thanks for any information to help me get by this step.

Ed Godfrey


- The Matronics RV10-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List
Back to top
View user's profile Send private message Send e-mail
rjones560xl@gmail.com



Joined: 29 Jul 2015
Posts: 64
Location: Las Vegas, NV

PostPosted: Sun Aug 23, 2020 8:01 pm    Post subject: Fuel Flow Test Reply with quote

The usable fuel on my tanks is right at 30 gal. The tanks hold about a quart more than that. You can come very close to emptying it if you run it dry. Obviously if was rough you would likely suck some air a lot earlier. I usually leave about 2 gals in the lowest tank and make sure I am landing with at least 10 in the other because I am a real Coward when it comes to fuel reserve. I weighted the tail down to get the nose up about 10 degrees. It was a waste of time. I flowed about 48 gal/hr with my Airflow Performance electric pump as measured just before the FM300 throttle body.

Robert Jones

Quote:
On Aug 23, 2020, at 6:19 PM, Ed Godfrey <egodfrey(at)ameritech.net> wrote:



RV10 builders/flyers,
I am pondering the fuel flow test as outlined in AC90-89B, Section 11, Par 1-19.e(1). For those of you who may have performed these tests, what climb angle did you use and how did you obtain it. I did a test with weighing down the tail and the best that I could get was about 12 1/2 degrees when the tail tie down hit the hangar floor. I am thinking about raising the main gear off of the floor, but was not sure as to what height would work out the best. I did place a call to Van's to see if they had a "standard" of unuseable fuel for the RV10, but the reply that I received was that it was up to the builder to determine that. Thanks for any information to help me get by this step.

Ed Godfrey







- The Matronics RV10-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

_________________
Robert J Jones
702-521-1840
Back to top
View user's profile Send private message Send e-mail
Kelly McMullen



Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

PostPosted: Sun Aug 23, 2020 9:15 pm    Post subject: Fuel Flow Test Reply with quote

As for the pitch up, I wouldn't worry about it. I happen to know that the stock mechanical pump continues to deliver enough fuel for full throttle at 11,500 and over 70 degrees of pitch up. No, I didn't have enough brain cycles to think about turning on the boost pump at that point. (obviously not an intention test, but the engine never hiccuped.
As for unusable, I pumped fuel out of one tank at a time when calibrating the tanks, and then pulled the quick drain. Less than 1 qt remained with the airframe at normal, on the ground attitude.
I haven't felt a need to put a precise number on it, because when I am down to 5 gal per tank, I am landing at nearest suitable runway, period.

Quote:
Sent from my TRS-80 Model 100



On Sun, Aug 23, 2020 at 6:19 PM Ed Godfrey <egodfrey(at)ameritech.net (egodfrey(at)ameritech.net)> wrote:

Quote:
--> RV10-List message posted by: Ed Godfrey <egodfrey(at)ameritech.net (egodfrey(at)ameritech.net)>

RV10 builders/flyers,
     I am pondering the fuel flow test as outlined in AC90-89B, Section
11, Par 1-19.e(1). For those of you who may have performed these tests,
what climb angle did you use and how did you obtain it. I did a test
with weighing down the tail and the best that I could get was about 12
1/2 degrees when the tail tie down hit the hangar floor. I am thinking
about raising the main gear off of the floor, but was not sure as to
what height would work out the best. I did place a call to Van's to see
if they had a "standard" of unuseable fuel for the RV10, but the reply
that I received was that it was up to the builder to determine that.
Thanks for any information to help me get by this step.

Ed Godfrey


===========
-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?RV10-List
===========
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
===========
WIKI -
errer" target="_blank">http://wiki.matronics.com
===========
b Site -
          -Matt Dralle, List Admin.
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
===========





- The Matronics RV10-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> RV10-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group