toggle quoted messageShow quoted text
Here's the thing. On my wheels at least, the valve stem doesn't point straight out. In fact, when filling air on my bench I often have to wedge a screwdriver behind it so I can get the air hose on it. You might want to hold off on this until you have some hands-on experience with it, then you can decide if it's necessary or not.
I have the same philosophy as Sam on the tire thing. I don't have a hole in my wheelpant either. I just see how they look during the preflight. Mine are inflated to 30 lbs. to start with. If they look good after 24 hours, they should be good for the season. Have fun at the Spring Fling. Planning on being at the FOD in the fall no matter what.... Dave D
On Mon, May 23, 2022 at 7:49 PM, Jay Scheevel
I have one like that, Mike. Tricky part is that the hose has to be exactly parallel with the stem to seal got pressure reading and filling. That is hard to do if you don’t have some wiggle room to line it up.
I'm thinking one of these inflator / gauges wouldn't need much of a hole and could reach in.
R& R ing the cap may require a creative gizmo of some sort.
On Mon., May 23, 2022, 7:34 p.m. Jay Scheevel, <jay@...> wrote:
Think of it like this. The empty weight is probably 650 pounds, and the amount of fuel may vary +/- 60 pounds. Most of the weight is on the mains, so you will be accurate to plus or minus 10%. I’d say good-to-go 😉
That is clever. Does the amount of fuel change the footprint much? I am guessing to do it with half to 3/4 fuel unless you always top off before flight.
On Mon, May 23, 2022, 5:04 PM Jay Scheevel <jay@...> wrote:
I usually just look at it. A polished eye can tell if it is low. However, you will need a port for filling them, so I think that is a good idea to build something like that.
If you don’t like “eyeballing it”, like I do, here is something you can do to measure pressure without putting a gauge on the stem.
Based on the fact that the tire-contact-area (sq in) X tire-pressure (psi) must be equal the weight on the wheel, and you know the weight on the wheel from your W&B, you can put a piece of paper under the tire and at different tire pressures draw a pencil line on the paper around contact of the tire to the paper for each pressure. Label these outlines corresponding to each pressure (you just need to do this once). Then take this paper to a xerox and make a bunch of copies. When you want to check the pressure, just roll the wheel onto a fresh sheet and check the size of its “footprint”. That will tell you the pressure.
2 things on my mind today.
First.... I attached some pictures of the little saddles I epoxied above my axles to help line up the axles with the holes in the wheel pants.
It's a snap with the airplane upside down, probably have to use a small jack under the tire to hold it up when it's right side up.
No jiggling around any more.
Second....What are you doing to accommodate checking and filling the air in the tires.
I'm thinking of drilling a hole large enough on the outside of the wheel pant to get the gauge/ filler in.
Somewhere between 3 and 9 o'clock low. Any recommendations?