FWF OP-62 Sniffe tube and Tunnel flap

 RV14 Build June 21

EXP 119 Mods

I ordered the pre-made sniffle tube as part of my aircraft specialty hose kit. Made this install very easy.

Another view of the sniffle, I did change to the one way valve on the bottom of the intake first.

Tunnel flap all together and chase tape installed.

Tunnel flap screwed into place.

Getting the cable length correct was a bit of a pain in the ass. Very tight space.

Finally got a cable that I like.

EXP 119 Mods 11 Man Hours 

FWF OP 62 Kit mods for EXP119

  

RV14 Build March/April 21

Exp119 Mods

Starting off with the mods is the cowl flap or exhaust tunnel flap. Simple enough, gather the parts, prime, assemble.

Prime

Assemble

Adding nutplates and cushion clamps.

Time to drill the nutplate locations.

Drilling. The hard part is how do you dimple the skin. I pruchased a bit that fits into the rivet gun that will hold a dimple die and if I drill a hole into a bucking bar to hold the other end of the dimple die I can smash it into submission. Or I bought some oversized rivets/oops rivets for AN-2 with smaller heads than -3 that will just night a slight countersinking. still TBD.

Nutplate loctions.

I was back and forth on adding another firewall pass through like the one above it or the special one that hold 2 cables. In the end I decided to use the special one with the kit.

Fitting the snorkel is detailed in the whole baffle section but here is the part that is OP62.

The snorkel interferes with the cylinder 2 oil return line. So disconnected it for now.

After I fit the snorkel I realized the baffle was pushed out by the cylinder heater elements. So I removed the baffle and trimmed it. of course I had to start from the beginning on fitting the snorkel since everything shifted.

Finally a good fit.

Drilled holes for clekoes and I fluxed the top abne bottom of the snorkel parts together. 

The fuel flow sender mount plate.

I had to add spacers under the plate before the cushion claps. This allowed the sender to sit away from the oil sump a little better.

Exp119 Mods 22.0 Hours

OP62: New IO-390-EXP199 Mods: Changing the fuselage parts

RV14 Build January

Exp119 Mods

I wish I knew some of this before, but here we are. First change is to change the cowling attach plates. Now that the exhaust exits near the sides and not out the center channel the plates are too long and might cause interference.

First one drilled out and nut plates removed, cut to size and deburred. The black was rattle can paint that I removed and primed the parts with AKZO.

Somehow I managed to cut the wrong side off one of the plates and had to fabricate a new one. This was actually kind of fun rather than waiting on Vans to ship a new part out.

Re-installing these is a little tricky under the engine mount. There isn't enough clearance to use the squeezer so I had to use the rivet gun and bucking bar. Definitely a tight spot.

Getting ready to rivet.

Got it all installed, Time for the other side. I was able to use the squeezer for the nutplates. I put them on last so the wouldn't interfere with the bucking bar.

Next the plans have you "not rivet" these areas, but since the build is well past this point I had to drill these out. I'm waiting on the FWF kit to make sure the holes in the "cowl flap" metal parts line up before I drill these holes out larger for nut plates. Riveting the most aft nutplate on is going to be hard with all the control pushrods in place already.

Marking the rivets that need drilled out.

This is a step that's in the current plans, kind of annoying that its not called up in the normal build. For some reason the right hot air vent gets a cap install on the front and you have to remove the forward pop rivets to rivet it on, as well as sealing it with RTV.

Section OP62 New IO-390-EXP119 Mods 3.5 Hours