Known building "Gotchas" for the Sling TSi

Model Specific Discussions about the Sling TSi.
huzilulu
Posts: 10
Joined: Sat Dec 14, 2019 9:12 am
Location: Houston TX

Re: Known building "Gotchas" for the Sling TSi

Post by huzilulu »

Make sure you double check which rivets to use! The Empennage kit uses some terms interchangeably- eg: 997/998/999:
997 - RIV 142 (3.2mm) on HS, RD
998 - RIV 153 (4mm) on HS, RD

But :
997 - RIV 454 (4mm) on EL and RIV 242 on VS!
998 - RIV 164 (4.8mm) on EL and RIV 143 on VS!

MTJ
Posts: 17
Joined: Mon Dec 09, 2019 7:53 am
Location: KCDC

Re: Known building "Gotchas" for the Sling TSi

Post by MTJ »

Elevator Counter Weights.

From another Builder....

From TAF.

This information is missing in our build manual and it will be available in the new TSI empennage manual that we will release this year.

We normally leave the last 3 rivets on either side of the balance weight arm unriveted. We then install the bolts and the rivets afterwards.

This provides enough free space to fit the balance weights properly.

The bolts are short but you should not install them with washers. This will give you about 1.5 threads sticking out from the lock nut.

The bolts & nuts must also be torqued to the correct value as specified in the introduction document.


Not riveting the 3 mentioned rivets made no difference on the difficulty getting the weights in place. I'm inclined to mount the weights and then insert the arm into structure

I was trying to insert the image here but since I'm dumber than dirt...... :oops:

MTJ
Posts: 17
Joined: Mon Dec 09, 2019 7:53 am
Location: KCDC

Re: Known building "Gotchas" for the Sling TSi

Post by MTJ »

huzilulu wrote:
Wed Apr 15, 2020 1:15 pm
Make sure you double check which rivets to use! The Empennage kit uses some terms interchangeably- eg: 997/998/999:
997 - RIV 142 (3.2mm) on HS, RD
998 - RIV 153 (4mm) on HS, RD

But :
997 - RIV 454 (4mm) on EL and RIV 242 on VS!
998 - RIV 164 (4.8mm) on EL and RIV 143 on VS!
I realized the same thing... now I sharpie the HW number next to (99x) symbol and on the places they go.

permagray
Posts: 21
Joined: Sat Nov 23, 2019 8:48 pm
Location: Michigan

Re: Known building "Gotchas" for the Sling TSi

Post by permagray »

Vertical Stabilizer - Page E 3.3 - Dated 2018/11/14.

Some builders will receive part 14 with 6 holes punched to M3 size and 5 holes to 3.2 mm. As shown in the diagram there should be 7 rivnuts installed which means drilling/reaming all 6 M3 holes and one of the 3.2mm holes to M4 size for the larger rivnuts. The same is true for the two M3 sized holes on part 9.

Also, some builders will receive parts 11 and 12 where the side holes do not align well enough with the channel holes. The build center says it is OK to drill out the holes to rivet if necessary.

huzilulu
Posts: 10
Joined: Sat Dec 14, 2019 9:12 am
Location: Houston TX

Re: Known building "Gotchas" for the Sling TSi

Post by huzilulu »

Flap manual - ver 5 states to dimple/countersink the Flap skin - not needed (note is an error)
Ailerons - rivet #997 should be 2.4 x 6mm stainless steel rivets, not 3.2mm

permagray
Posts: 21
Joined: Sat Nov 23, 2019 8:48 pm
Location: Michigan

Re: Known building "Gotchas" for the Sling TSi

Post by permagray »

For the TSi Wing assembly instructions Dated 1-7-2020 on Dropbox, and Page dated 2019/11/20 attributed to Tebogo T (with a blank page number) which I will label W 10.1 - Description: TSi flap Assembly - Right.

There is an instruction below the parts list which states: "Note: Dimple and countersunk rivets on the flap skin FL-SKN-001-R-F-3 where they need to be dimpled to 3.3 by using the 3.2 x 10 mm"

TAF says to ignore this instruction.

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PhilipRueker
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Re: Known building "Gotchas" for the Sling TSi

Post by PhilipRueker »

On the rear spar of the Vertical Stabilizer, there are a series of 7 Rivnuts that get attached to the doubler plate, as well as two attached to the Angle bracket.
there is spacing between the double and the angle bracket for the 7 rivnuts for uniform load, but I had to enlarge the holes in the main rear spar for the bottom two rivnuts to sit flush or else they would push out the rear spar and may creates stress leading to metal fatigue.
Image

You can see in the Finishing Kit instructions that those bottom 2 rivnut heads are visible that support my reading of the situation.
Image

Here's pictures of my completed VS to show:
Image
Image
Building a Sling TSi in my Garage.
Build Log | Timelapse Progress Videos

MTJ
Posts: 17
Joined: Mon Dec 09, 2019 7:53 am
Location: KCDC

Re: Known building "Gotchas" for the Sling TSi

Post by MTJ »

PhilipRueker wrote:
Thu May 21, 2020 8:59 am


You can see in the Finishing Kit instructions that those bottom 2 rivnut heads are visible that support my reading of the situation.

So it looks you left the 4 upper Rivnuts alone? your solution looks great.

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PhilipRueker
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Re: Known building "Gotchas" for the Sling TSi

Post by PhilipRueker »

MTJ wrote:
Tue May 26, 2020 4:58 pm
PhilipRueker wrote:
Thu May 21, 2020 8:59 am
You can see in the Finishing Kit instructions that those bottom 2 rivnut heads are visible that support my reading of the situation.
So it looks you left the 4 upper Rivnuts alone? your solution looks great.
Yes, just those 2 bottom ones were pushing on the spar, the ones above sit between the angle and the doubler and are fine.
Building a Sling TSi in my Garage.
Build Log | Timelapse Progress Videos

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