|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

05-11-2014, 11:33 AM
|
 |
|
|
Join Date: Jan 2005
Location: Yorkshire, England
Posts: 2,052
|
|
Too slow over the top.
It can 'sit down' over the top sometimes - feels really awful.
Look at entry speeds and g loads.
There are many books out there - my favourite is by Eric Muller and Annette Carson. It's called Flight Unlimited '89.
Sometimes difficult to get hold of, but superbly written in an easy to read and understand way.
Helped me with aeros a lot.
__________________
"I add a little excitement, a little spice to your lives, and all you do is complain!" - Q
Donated in 2020
|

05-11-2014, 02:01 PM
|
|
|
|
Join Date: Feb 2005
Location: Victoria B.C.
Posts: 1,266
|
|
Thanks Russ, I tried various air speed entries and it still did it. I will pay more attention to the air speed and see what happens. I have being doing loops in this plane now for five years and my previous RVs and never had it happen before. I have been heavy in the past and light with none of this happening. I know what it is like to stall at the top and anywhere in between and have never experience it before. There was no feedback from the stick when it happened either. It was just like someone out there slapping the tail, maybe oil canning but the skins are all tight.
|

05-11-2014, 02:14 PM
|
 |
|
|
Join Date: Apr 2012
Location: Tampa (BKV)
Posts: 926
|
|
There isn't a lot going on back there mechanically. Take off the inspection panels and fairings and give everything a thorough lookin at. If you're satisfied all is as it should be...I would suspect oil canning or tail stall. A discussion with Vans wouldn't hurt either.
__________________
RV-8 Flying
1,235th flying RV8
SARL Race#95
SnF Homebuilt Judge
2015 Sun n Fun Kit Built Reserve Grand Champion
2015 Oshkosh Kit Built Champion
2015 Jeffco Kit Built Grand Champion
2014 Oshkosh Outstanding Workmanship Award
Broken Warrior of the Jarhead Clan
|

05-11-2014, 02:21 PM
|
|
|
|
Join Date: Feb 2005
Location: Victoria B.C.
Posts: 1,266
|
|
I have had all the inspection panels off and the intersection fairing and no faults found. I guess it was a tail stall but have never had that happen before, but there appears to a first for everything.
|

05-11-2014, 02:26 PM
|
 |
|
|
Join Date: Oct 2005
Location: Vancouver, WA USA
Posts: 908
|
|
Ok well that?s odd, sounds like you?re not new to this stuff, if you?re sure it?s not a stall buffet and it?s a new sound you better start looking close at things, tail attachments, hinges, etc. take out the baggage compartment too and make sure you don?t have a flashlight floating around back there too.
|

05-11-2014, 02:53 PM
|
|
|
|
Join Date: Nov 2006
Location: Tampa, Florida (KVDF)
Posts: 491
|
|
Quote:
Originally Posted by Russ McCutcheon
Ok well that?s odd, sounds like you?re not new to this stuff, if you?re sure it?s not a stall buffet and it?s a new sound you better start looking close at things, tail attachments, hinges, etc. take out the baggage compartment too and make sure you don?t have a flashlight floating around back there too.
|
That's exactly my thoughts. On my Rv6a right behind the baggage bulkhead is where the recommended area is to mount the elt and strobe box. Perhaps some how one of these came loose? Just thinking out load here.
Bill
__________________
RV6A flying as of November 8, 2016. N717WK
Finishing a RV10
|

05-11-2014, 03:18 PM
|
 |
|
|
Join Date: Dec 2004
Location: Gold Hill, NC25
Posts: 2,400
|
|
If the shoulder straps were loose, the Hooker buckle near the rear attach point can bang on the top of the fuse of the tandems. You did not say what plane you were flying. SbS models would not demonstrate this.
__________________
Kahuna
6A, S8 ,
Gold Hill, NC25
Last edited by Kahuna : 05-11-2014 at 03:21 PM.
|

05-11-2014, 03:47 PM
|
 |
|
|
Join Date: Oct 2009
Location: Victoria, BC, Canada
Posts: 3,932
|
|
Another "out there" suggestion: Don't focus entirely on the tail. A few years ago I hit a seagull while flying a Cessna 150... The bird glanced off the top of the leading edge, on the pilot's side, about 4' out. No serious damage, but the "bang" when it hit was deafening.
I was 100% certain that the bang came from the tail of the airplane. After I landed I went over the entire tail looking for anything that would explain the bang, but couldn't find a mark. I didn't find the dent in the wing until I climbed up to fuel it.
__________________
Rob Prior
1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
|

05-11-2014, 04:47 PM
|
|
|
|
Join Date: Feb 2005
Location: Victoria B.C.
Posts: 1,266
|
|
I am at a loss for what it was. I have since done a very thorough annual on the RV7. There was nothing amiss except a worn out carpet on the pilots side floor which was replaced. No extra parts except the usual dirt found anywhere. The SB was done on the tail no cracks found. No loose or broken bolts back there. I don't remember the airspeed going over the top, the entry airspeeds that were tried varied from 140kts to 160kts IAS. Went up by myself it could not be duplicated even at slower speeds. The loops just wouldn't be as pretty at the lower entry speeds. I tried stalling it going over the top at various locations and it would stall but not behave with the same noise back at the tail. Some day I will take him up again and see what happens. By the way he use to teach aero and he was at a loss also.
|

05-11-2014, 07:44 PM
|
|
|
|
Join Date: Feb 2005
Posts: 592
|
|
Norman,
Do a search here about oilcanning in the -7, it's well covered.
I know I wouldn't like hearing that during a loop either.
Glenn Wilkinson
__________________
_____________________________________________
RV-4 Sold
N654RV @ MLJ
RV-7 Coming Soon
N987RV Reserved
2015 Donation Gladly Paid
"Maintain Thy Airspeed, Lest the Earth Arise and Smite Thee"
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 08:09 AM.
|