VAF Forums

VAF Forums (https://vansairforce.net/community/index.php)
-   RV General Discussion/News (https://vansairforce.net/community/forumdisplay.php?f=2)
-   -   Underwing Ordnance? (https://vansairforce.net/community/showthread.php?t=143245)

TXFlyGuy 10-30-2016 10:00 AM

Underwing Ordnance?
 
Has anyone ever mounted underwing ordnance on an RV? Something like this?



What kind of effect did it have on flight characteristics, and airspeed loss?

lr172 10-30-2016 10:08 AM

I have not, but I am anxious to learn about the mission behind this.:D

Larry

plehrke 10-30-2016 11:00 AM

Depends on the weight but would be a signifant increase in stall speed and therefore landing speed.

SMRacer 10-30-2016 11:07 AM

Chicken bomber
 

I can feel a little yaw when the tube is mounted.

RV6_flyer 10-30-2016 11:07 AM

Numerous RVs in the D.C. area have "Rubber Chicken" launchers that they use once a year at the "Rubber Chicken" drop. They would be the ones to ask about how the airplane is in the air with the Ordnance installed.

az_gila 10-30-2016 11:11 AM

Sort of like this?

http://www.vansairforce.com/communit...d.php?t=106088

Slice 10-30-2016 11:13 AM

Quote:

Originally Posted by TXFlyGuy (Post 1122885)
Has anyone ever mounted underwing ordnance on an RV? Something like this?



What kind of effect did it have on flight characteristics, and airspeed loss?

I see a visit by the FBI in your future...;)

TXFlyGuy 10-30-2016 01:53 PM

Quote:

Originally Posted by Slice (Post 1122904)
I see a visit by the FBI in your future...;)

No worries. I donated to the Clinton Foundation.

TXFlyGuy 10-30-2016 01:54 PM

Quote:

Originally Posted by az_gila (Post 1122903)

That is way cool. These bombs can easily be converted into fuel tanks, according to the manufacturer.

Tom Martin 10-30-2016 02:36 PM

A pumpkin dropper on my Rocket. I used a solenoid from a rear hatch on a old jeep to activate the "spear". When you flipped the switch, the spear pivoted down and released the pumpkin.
The first time I dropped one at a pumpkin dropping contest I activated them mechanism too soon and missed the airport!
We called that embarassement premature pumpkulation.

(My apologies for the rotated picture, lean to the left!)


TXFlyGuy 10-30-2016 03:18 PM

We can have these bomb racks functional as there is a release mechanism that can be used. Might not want to mention that to the friendly aviator association, however.

Mel 10-30-2016 03:32 PM

Quote:

Originally Posted by TXFlyGuy (Post 1122949)
We can have these bomb racks functional as there is a release mechanism that can be used. Might not want to mention that to the friendly aviator association, however.

Current operating limitations address this:
"If the aircraft will have removable externally mounted equipment, it must be test flown in all configurations.
An entry must be made in the aircraft records indicating the configurations flight-tested, unless the original manufacturer’s flight test data for that equipment is included in the aircraft limitations. If relying on the manufacturer’s data, the aircraft and load must conform to the manufacturer’s design and be maintained to manufacturer’s instructions. Otherwise, the aircraft owner/operator must conduct test flights in all configurations and make an entry in the aircraft records indicating the configurations flight-tested. (40)"

David Paule 10-30-2016 04:02 PM

Surprisingly, the flight envelope for releasing stores might be narrower than you'd think. I've seen movies taken of stores released where the released device came up and hit the airplane. You won't know that unless you've got a high speed camera taking a video of the event from a chase plane. The chase isn't chasing in this case, it's off your wing and well clear.

Start slowly and work up to the higher speeds and descent angles. Don't go to the next test point until you're absolutely certain that no threatening tendencies are showing up. Keep your test points close together.

And before doing all that, do a series of new flutter clearance tests.

This isn't something to be taken casually.

Dave

TXFlyGuy 10-30-2016 04:30 PM

Quote:

Originally Posted by RV8JD (Post 1122961)
In this case the external store downed the chase. (Ignore the title of the YouTube video. There was no midair collision between the two airplanes.)

https://www.youtube.com/watch?v=LBqm7asYs6Y



+1 on flutter considerations. External stores can have quite a negative impact on flutter speeds if not done correctly.

Thanks for the advice. We will have these fully tested by a professional.

SHIPCHIEF 10-30-2016 05:51 PM

Tom Hunter posted this tasteful Youtube video "Flight Testing A Small Drop Tank..."
https://www.youtube.com/watch?v=a9_TqOB6_Jk
My RV-8 has fuselage hard points that supported a 'rotationally symmetrical' muffler when I was running my Turbo Rotary engine. I could still use them to fasten a Vetterman Fuselage fairing, cargo pod or...?


All times are GMT -6. The time now is 08:47 AM.