sundevil777

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Posts posted by sundevil777


  1. 2 hours ago, Bigfalls said:

    Rep Joe Neguse (D-Colorado) sponsored the Aircraft Noise Reduction Act.  The act would allow regulation of airport noise at the local level, reversing the policy of federal aviation regulation that has been in place since the 1920's.

    Did Kim have something to do with this.

    https://www.dailycamera.com/2019/12/12/congressman-neguse-introduces-aircraft-noise-reduction-act/

    It appears that it would run into supremacy problems - local vs federal laws. Is there some reason why the local lawmakers would think that it would survive scrutiny? Is this just a gesture which they know will get slapped down as unconstitutional?

    How do they think their law will be able to require "...federal funds cannot be withheld from an airport that chooses to locally regulate noise." ?

     


  2. 51 minutes ago, billvon said:

    No idea.  It was a small aircraft (Q400) and there were several of us with rigs.  Maybe he thought "I've seen this movie before?"

    Wearing a bare rig (not Billvon - the others) to board a flight is not wise. So many likely nervous grandmas and pilots that can express their concern, and then it is an easy decision for security of whatever label to tell us it can't be carry on. The more this type of thing happens, the more likely they will not be allowed ever. It doesn't matter how many letters from the TSA/FAA or X-ray cards you have, they can say no and not have to justify it to anyone.

    • Like 1

  3. 11 hours ago, 20kN said:

    How are you going to differentiate between a canopy opening and wingsuit operation that looks like a canopy opening? It is entirely possible, and not even that hard honestly, to replicate what appears to be an opening canopy using a wingsuit. I can dive my wingsuit to a vertical speed of 120 MPH and then over the course of 600' flare up to a 20 MPH decent rate and hold at that rate for several seconds. On a graph annotating only decent rate, the two scenarios would look quite similar. That's why altimeter manufacturers struggle with correctly identifying when the canopy opens with wingsuit use. Many of the digital altimeters out there have a wingsuit mode, but with a large wingsuit they still dont work and they misjudge the opening altitude all of the time because there is no way for them to differentiate between a canopy and a wingsuit when flying a wingsuit that has the ability to gain altitude. With only one sensor indicating only air pressure, the device has no way to determine anything other than fall rate. The only company out there that has had success with this issue that I know of is the AON X2 because it uses GPS to determine canopy opening info so it can measure on all three axis. However, even at that the altimeter misjudges opening altitude sometimes. Even my own AAD sometimes misjudges opening altitude. It does a much better job than most digital altimeters do, but even it gets tricked on rare occasion if I am flying a large race suit and doing flares.

    His design has accelerometers instead of just pressure sensors. That changes everything in terms of what mode of flight can be detected.


  4. Twice this last season I likely would have had a Vmag mount knocked loose during combat RW shenanigans. My chinmount.com mount only became dislodged a bit. I am using the longer than intended rubber bands and still have no shakiness whether belly or vertical, but my session model camera doesn't generate as much drag as the larger models.


  5. I think it used to be described as “punch” instead of pull, and the distinction of urgency. A hard pull doesn’t feel so hard if you’re punching it out, and take advantage of the slack in the system to get some speed going before the real force has to be applied. It would be great to encourage specifically in training/safety day. 

    Large ring risers/old school rocks.

    Gotta punch it.


  6. 2 hours ago, coticj said:

    Why does the fuel weight really matter? Based on the data you gave the numbers aren't that much different.

    Empty plane 1003kg, max landing weight 1633. You then have 630kg available. When you calculate the engine weight saving you have extra 148kg available. This means total 778kg.

    Batteries weigh 600kg, so that gives you 178kg available for passengers and pilot.

    "NASA batteries" isn't really a thing yet and it is not going to be for a few decades, and when it comes it is going to be super expensive.

    Even if they are not using standard production batteries they are not getting much better energy density the Tesla packs have.

     

    Something must be getting mixed up I think in the comparison, if those beavers on floats are going to be doing commercial service, they gotta be taking up the same or near the same number of passengers, don’t you think? 


  7.  

    Wearing surgical type gloves under thin leather gloves works great. My advice is to put on the surgical gloves on the way to altitude to reduce the likelihood of your hands getting sweaty. That means just wear the leather gloves at first, then add the surgical gloves on the way up. Work it out with your instructors, they won’t like the distraction, so clear it with them first so nobody is surprised.


  8. Does the Ares, like the Viso, show the “tens” of feet digit in free fall (a useless, distracting blur in freefall)? Am I the only one to think it is amazing they continue to show that digit?

    I think the readability of the L&B products is much worse than the Alti-2 products because the numbers are displayed on a seven segment display type arrangement - straight line segments to display the number. The Alti-2 display (even way back to the Neptune 2) does not have this restriction, allowing a much more quickly readable display. I think the “rounded” font, with higher aspect ratio of each character, and the narrower stroke makes for a huge distinction between the brands. 


  9. 17 hours ago, PlaneFun said:

    Just wondering if most people carry on their rig on check it down below. This would be for travel within the U.S.A.

    Also, do you "disguise" your rig  in a bag or rig sleeve?

     

    Be aware security may demand you open the main and reserve. It does not matter if you have the X-ray cards and USPA letter and all, they can demand it and you can't expect to change their mind.

    Be aware that carrying your rig around exposed might cause some nervous Nellie to get security involved. No matter how cool it might seem to get on a commercial flight with your rig on your back, it draws unwanted attention and could result in skydivers being treated worse in the future.

     

    • Like 2

  10. 1 minute ago, gowlerk said:

    Spoken as the true Airtec lover and defender you have always been here. Two points. Airtec no longer requires, only recommends 5 year servicing on the new units. Which means that almost no one will bother, making one of your points moot. And the other thing is that the demand for used AADs far exceeds the supply. This makes buying a new one the cheapest option on a per year cost basis.

    My point about getting a used unit applies not just to Cypres. I understand that the used market is tight. Sometimes the per year cost matters less than the "right now" cost. For some, the desire to have a predictable cost (warranty that lasts) is important.

    I am a fan of the Cypres, but will be considering others when I need to replace mine in few years. The competitors definitely have some advantages, as I have mentioned. I even bought an Astra way back when I returned to jumping after several years away. Fortunately others persuaded me to reconsider and I was able to return it. Back then the only other choice was the original version of the Cypres. The exchange rate at the time allowed me to buy it at perhaps the lowest price ever.

    • Like 1

  11. The cypres does have the benefit of being in warranty for the entire lifetime if you get it serviced as recommended.

    The mars has a 2 year warranty. If the battery on a mars does need to be replaced, even though the mfg says it should last 15 years, it would presumably not be done for free. It is great that it shows the remaining battery life left, and it also shows the pressure the unit is sensing for confirmation to a local barometer. If that pressure check is not within the recommended tolerance, then presumably fixing the unit would not be free.

    Of course the 15 year warranty of a cypres comes at a cost, and most never need to get their AAD fixed at any time during their life. I think we should acknowledge the trade-off when discussing cost comparisons.

    Another point worth acknowledging is a Cypres can seem to have no problems at all, no problems during the start-up self-test, and then when SSK does the full series of tests including accuracy/resolution at the fire/no fire limits, high/low temp, vibration, etc it fails to meet the original standards and requires repair before returning to the customer. Does this mean it would have necessarily failed to save your life if needed? No, but it does mean that the mfg is not comfortable with the self test being the only check on the proper function of the unit, and for very good reason - some fail! The self test can't check things to the same extent as can be done at the factory.

    The self test cannot simulate a jump (simulate the pressures on the transducer) to test the entire system, and cannot test it in harsh environmental conditions. It just is a partial check of the health of the electronics.

    If cost for an AAD is critical, then getting a used unit is also worth considering. If a used unit is bought at the right price, then the cost/year should be about the same as if buying new. I hear finding used units at the right price is the challenge.

    • Like 1

  12. 1 hour ago, massis said:

    then I revert to my original statement: there's no way i could pull out my loop far enough to easily hold it down with enough to spare so I could take out the pin and put it back in. I need to hold a fair bit of tension on the pullup cord (or packing tool) in order to have enough loop available to get the pin through...

    It might be easier than it seems, if you haven't actually tried.

    Unnecessarily high closing loop tension is common.


  13. 1 hour ago, massis said:

    I know that technique but found - in my limited experience - that even then the loop wears faster. However I never considered using the pin to pull the loop out a bit to reduce the tensions, which I assume now sundevil was talking about.
    I originally imagined him pulling the loop out far enough so that you can place a finger on it to keep the tension of the outer end and remove the pullup cord and then insert the pin, which made very little sense :-)

    You are correct, while I'm holding down on the loop with my thumb, the pin can be taken out and reinserted (there is no reason to want to do that), and of course the pullup cord can be removed with no wear on the loop.

    I do not "use the pin to pull the loop out a bit...", I just use the pullup cord to get the loop out far enough to allow the pullup to be removed without any friction.


  14. I would be more concerned about losing it from the occasional combat RW encounter. The mag and Grellfab also protrude so far, which makes interference with the mud flaps while looking to the side under canopy worse. 

    I love the https://chinmount.com/ alternative. I haven’t seen anything so low profile, so inexpensive, so well made, and can be used on a Kiss helmet. The ability to dislodge, and break or cutaway is superior to the mag IMO.


  15. 2 hours ago, massis said:

    I'm going out on a limb here and say that if you can pull your loop so far through that you have enough spare to do that, your loop is WAY too long and will have far too little tension on it to be safe.

    When I was in AFF they told us that if your hand didnt hurt after packing and you weren't nearly crying when closing the final flap, your loop is likely too loose. While I do now think that's a bit of an exaggeration, I do see the importance of having a tight loop, which means pulling it through the final grommet more than 1/2" is probably way to loose.

    I understand your comment about the loop being too long, but no need for concern. It doesn't need to be much past the final grommet for the technique to remove the pullup with zero tension to work.


  16. 2 hours ago, massis said:

    I guess you're holding it wrong then. Gripping the packing tool with 4 fingers hurts a LOT less than wrapping the pullup cord around your hand and pulling. Mainly because the stress on your hand is focused in the most outer spot where touches your hand, while the packing tool can distribute the force nicely across 4 fingers.

    On top of that, the round cord is much smoother to remove from the loop with the pin inserted, causing less wear on the loop in my experience. After 60 jumps my loop was good as new.

    I was holding the pack tool as you describe, and I still say it is less comfortable than an ordinary pullup.

    I can agree with you that the spectra cord will wear the closing loop less than a typical pullup used in the normal way, which means withdrawing the pullup when full tension is on the loop/pin. I withdraw my pullup while there is zero tension on the loop, because while the loop is pulled through with extra to spare, I hold my thumb on the loop against the grommet until I get the pullup removed.