SH Hang test

[Hoges]

Just hang tested the SH rebuild and have the following results;
85kgs was 4.2 degrees nose down
195kgs was 6.9 degrees nose down
As my SH is different with underslung tanks and a different tall tail how does this compare with other SH owners hang tests?
Any numbers appreciated.
Scott
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[Timchick]

Do you have any photos of your underslung tanks?

[Aussie_Paul]

Just hang tested the SH rebuild and have the following results;
85kgs was 4.2 degrees nose down
195kgs was 6.9 degrees nose down
As my SH is different with underslung tanks and a different tall tail how does this compare with other SH owners hang tests?
Any numbers appreciated.
Scott

Hi Scott, sorry I missed your call a couple of days ago. What fuel %? full or empty when you hung it?

I reckon that those figures would be ok to start with. You may have to move your rotor head back a couple of inches. I believe the ideal hang test is when the keel, if it is the horizontal datum, flys level at the most used weight and speed.

Aussie Paul. :)

[Hoges]

Tim,
Here is the link to the photos I posted much earlier. I have now had a rush of blood to complete the until now, stagnant project.
http://www.rotaryforum.com/forum/showthread.php?p=351805#post351805
Paul,
fuel was about 80 % (approx 65 litres, of 83 max).
I think the max and min degrees being close together may have something to do with the underslung fuel tanks being closer the vertical centre of mass as my RAF was 3 degrees down with 72kgs and 7.5 degrees with 200kgs.
Scott
________
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[Hoges]

Here is a side pic while hanging...

Scott
________
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[Brent_Brown]

I would make a glass cone to bend the tanks into the body.

[Aussie_Paul]

Tim,
Here is the link to the photos I posted much earlier. I have now had a rush of blood to complete the until now, stagnant project.
http://www.rotaryforum.com/forum/showthread.php?p=351805#post351805
Paul,
fuel was about 80 % (approx 65 litres, of 83 max).
I think the max and min degrees being close together may have something to do with the underslung fuel tanks being closer the vertical centre of mass as my RAF was 3 degrees down with 72kgs and 7.5 degrees with 200kgs.
Scott]

I agree Scott. From my experience, with your SH at or very close to CLT, and the RAF with a very HTL, your SH will need to hang further nose down compared to the RAF.

Aussie Paul. :)

[Hoges]

Hi Brent and Tim,
Do you have any hang figures for your machines so I can compare them with mine?
Scott
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[Brent_Brown]

mine is not a RAF or SH
but it was 12 down on the keel

[Hoges]

'Read the manual' I was told every time I bought a new piece of equipment but guys don't need to do that do they?
So, on page 154 of the construction manual it says hang angle should be between 3 and 10 degrees nose down.
There you go.
Scott
________
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[Aussie_Paul]

'Read the manual' I was told every time I bought a new piece of equipment but guys don't need to do that do they?
So, on page 154 of the construction manual it says hang angle should be between 3 and 10 degrees nose down.
There you go.
Scott

Scott, once an aircraft is modified the standard rules go out the door. The new figures have to be made by the test pilot. I refer back to my previous post re the flight testing.
Your hang test figures should be safe to begin the flight testing to see at what angle the horizontal datum line flys at.

Aussie Paul. :)