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Everything posted by FredStork

  1. FredStork added a post in a topic Avid Wing Tanks   

    I have never seen the original aluminum tanks (that cracked...). The traditional fiberglass tanks are a structural part of the wing. I the aluminum tanks were conceived the same way the flex of the wing could/would crack them.
    But if the tanks are "free floating" within the wing there would be no stress an they would remain intact - but we would loose the structural function of the tank. With no tank installed in the wing there is a diagonal tube in place.
    The only real issue with the original fiberglass tanks is if they are not compatible with ethanol. So if a ethanol resistant resin is used I don't really see the issue with the traditional tanks. 
    The issue with having multiple connected tanks in the same wing isn't so much the fuel flow out as fuel in... unless the connection can manage the flow correctly. 
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  2. FredStork added a post in a topic Kitfox 1 questions   

    I shared some Oratex experience in a previous string, you can find one of the posts here, and more in the same string:

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  3. FredStork added a post in a topic Have a Matco TW and not happy how it releases?   

    Sorry, very happy with the standard Matco mechanism - releases only when I want and expect it to. Less happy with the solid wheel but replaced it with ome with pneumatic tire as detailed on another string, works great. 
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  4. FredStork added a post in a topic VHF Antenna   

    Please excuse a probably stupid question - but I just dont know... 
    Is there any relation between reception and transmission? Meaning, if I my reception is good does that automatically mean that my transmission capability is good as well - through the same antenna? Obvious caveat for poor mic etc... 
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  5. FredStork added a post in a topic CONTRIBUTIONS TO KEEP SITE GOING   

    You should have recieved my contribution around Jan 16 via PayPal. If that is not the case let me know.
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  6. FredStork added a post in a topic VHF Antenna   

    Thanks Chris!
    Yes, they charge full price like for anything that goes on an airplane... I payed ~50USD but if you shop around you can even get it for 65...
    But it works well and is very easy to install. Appears solid.
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  7. FredStork added a post in a topic VHF Antenna   

    Hi Chris,
    I'm using an un-grounded dipole antenna, placed on top just behind the turtle deck, and my biggest problem is that I feel like picking up communications from half of France when flying...  Can you explain the coupling issue you mention? The blind spots you are talking about are those for transmission mainly? 
    This is the kind I have, no ground plane required - but maybe we are not talking about the same kind of antennas...
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  8. FredStork added a post in a topic Model C ?   

    Hi Turbo!
    Nice to hear feedback on the films - you can only guess how much I enjoy doing them... Not sure if your message is a question or a "now I know" but I assume the latter and that you have seen the blog as well about my Simonini Victor 2. Interesting evolution is that Simonini no longer sell the model I have, i.e the one with "only" 92 hp, the entry level is now 100 hp for the weight and cost of a 582 but with the consumption of a 80hp 912... For my longer trips the 20 kg difference is really useful so I can bring all my stuff - and 2 stroke oil for the entire journey (joke on me...)
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  9. FredStork added a post in a topic Who’s experimented with spinners?   

    In terms of drag the difference should not be noticeable but, as already mentionned, do keep an eye on your water temperature as the spinner (can) have a significant impact on the airflow to your radiators...   
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  10. FredStork added a post in a topic Engine Failure yesterday   

    it sounds like you have separate arrivals to the header tank from each of the wing tanks (i.e. the 2 wing tanks are not joint by a T prior to the header tank). If this is correct the noticed behavior is expected. The air in the header tank, with "no where to go" (no vent open and nothing being drained from the header tank) will block the arrival of fuel. The diameter of the fuel lines is too small to let air of any significance trickle back to the tank against the fuel. When you open the valve to the other tank the air will escape through that tank. Once the header tank is full fuel will flow from tank 1 to tank 2 until they reach the same (vertical) fuel level. With identical tanks, and the plane level, they will end up with the same volume.
    If you open the vent on the header tank you can fill it up without opening the second wing tank valve. Either "always open" at a point higher than highest point of your wing tank or open on demand.
    it is not clear if you only have a T between the 2 tanks or if you have a T and 2 valves so you can select what tank to use. If the connection between the 2 tanks is always open fuel will flow between the tanks until they are at the same level (communicating vessels). This is normally not a problem and the advantage is that there are no valves to be set in the wrong positions. But if gives less choice.
    Going back to the start of this string...  if you lose a fuel cap and have communicating wing tanks both tanks could be emptied through the lost cap with little or no fuel reaching the header tank at all (particularly with an open vent...).
    If fuel flow (significantly) faster from one tank than the other (partially clogged fuel lime...), that tank could get drained before the other - ending up with the fast flowing tank working as a vent where air can get sucked into the header tank, rather than fuel, by the pump as discussed in the string. 
    Also, while everyone loves flying most of the time we fly alone, and while we spend a lot of time flying for most of our flights the volume of one wing tank is sufficient. Our planes are light and you can feel the difference between empty and full tanks. Piloting from the left seat the fuel will be a counter weight if you use the right wing tank (single tanks are by default on the right side for this reason). We don't always know if there is ethanol in the fuel and what our tanks think about it, saving one tank from permanent exposure and only use it for long flights might pay back one day...  Same goes for any contamination of one tank, you can use the other. It is also easier to read  the fuel level when using only one tank. Gravity flow will benefit from one tank as the difference between tank fuel level and the outlet will be greater.
    But none of this actually matter as we always fly with the knowledge that the engine can stop at any time and we therefore always know ahead where to land. Slow and light we glide to safety, fold our wings and have a friend pick us up with a trailer... Been there, done that... 
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  11. FredStork added a post in a topic Engine Failure yesterday   

    You probably have a point there. I even found one explicitly saying not to be used with flammable or explosive liquids... and no one  saying permanent immersion in fuel... I'll keep digging - but will probably end up with the expensive version as usual... Thanks for the link!  
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  12. FredStork added a post in a topic Engine Failure yesterday   

    I like the inline version - but why did someone tell them this is used by people that are so rich they have their own aircrafts? I find the standard version for 1/4 of the cost on other sites but unfortunately not the inline version... 
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  13. FredStork added a post in a topic Engine Failure yesterday   

    Hi FlyWise,
    please tell us more about the infra red fuel level detector... like a link to wherever you got it from...
    I have found that the system I have, an inclosed breaker triggered by a tube shaped magnet in somekind of floating plastic, tend to sometimes get stuck in the low position. 
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  14. FredStork added a post in a topic Engine Failure yesterday   

    there are, as you can read in this string, 2 schools... "Always open vent" or "Open vent only to vent out the excess air, then close it", pros and cons (based on sometimes conflicting theories) has been discussed at length.
    I suggest you read all the mails (i.e. not only my mails and theory - that might be in minority...) . The way I see it is that an open vent is is a way for air not only to escape (that is what we want) but also to enter (and we do not want that). The comment from Gfry is also correct, fuel can get succeed out through the vent line (this is normally easy to detect as your canopy get white and crack almost instantly...)...
    And I do have some thoughts about "both tanks to a tee"... 
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  15. FredStork added a post in a topic Avid 1581 is getting close   

    Beautifu! 2 questions, did you find a usb converter that don't mess up your radio with static, if so tell us about it... The landing gear, is that cub like bungee suspensions under the neat covers?
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  16. FredStork added a post in a topic Shock Cord /Bungee cord   

    Her is another post: (and I can confirm the right chock cord is still in stock a Aircraft Spruce in Eu... By the foot)

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  17. FredStork added a post in a topic Better Avid Gear   

    An idea I've had for a while is if the traditional Avid bungee landing gear could be improved without being replaced. I know many pilots really like the wider gear. I'm sure it is nice but I don't mind the narrow gear (and it fit very nicely on the trailer...). What I don't like is the un-damped bungees. The harder you land the higher you jump... 
    What about "just" installing some kind on dampers?  Has anyone already tried this or had the same idea?
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  18. FredStork added a topic in Avidfoxflyers General Hangar   

    ANR Hedset - is it worth it?
    Doing a poll for ANR Headsets. They cost a fortune and are sometimes not that efficient with 2 strokes. If you have one, please share your feedback. 
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  19. FredStork added a post in a topic Guess my weight contest   

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  20. FredStork added a post in a topic CONTRIBUTIONS TO KEEP SITE GOING   

    Is the emainl to akflyer in the Feb 9th 2014 post (in this string) still valid for paypaling? 
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  21. FredStork added a post in a topic Luga Propellers   

    Thanks for the update - I was just about to ask.... 
    you mention 95 hp, what engine do you have? I’m currently using short 3 blade warp drive that worked well mith my old and tired 532 but don’t give what I expect from my 92hp Simonini.
    please keep posting your impressions and kool experience
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  22. FredStork added a post in a topic Super STOL XL build   

    2 more "wish I had known before" oratex tips...
    Using plain masking tape the white/light-yellow kind is a good idea. Do NOT use blue masking tape in combination with the glue as it will stain. Luckily that was on the botton of the fuselage and rather limited...
    The pre glued oratex edge tape is good but not excellent. You should apply glue also on the other surface and this makes things complicated when using pinked edge tape. Pinked looks really nice but you will either end up with glue bleeding between the triangles or with flapping triangles, I have seen it on my own plane and on other's (so it is not just me...). Straight edge tape will obviously help. By generoulsy applyning glue on scrap before cutting it you can easily make your own edge tape.
    The advantage of the pre glued edge tape is that is softer and more extensible and there fore might be better for particulerly difficult curves like the tail-fin to fuselage negative bend... 
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  23. FredStork added a post in a topic Super STOL XL build   

    Yes, I can confirm that the glue turns ligth yellow after polymerization (it might take some time). Once the glue has been heat activated it can only be mechanically removed, meaning that any glue bleeds might need to be painted. This is not a big problem as long as you take some care when applying the glue. On Cub Yellow it should be invisible, hardly visibile on most colors, worst is probably white... As you will need a small tin of paint in your chosen color anyway it is realy not a problem. Knowing it in advance (as once applied and dried the glue is transparent/invisible) will help (would have helped...)
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  24. FredStork added a post in a topic Luga Propellers   

    Thanks for the followup, appreciate that! 
    For the incomprehenisbile  relation between prop engaving and actual prop diameter I guess the solution is some back and forth with Roman before placing the order.
    Good luck and keep us updated!
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  25. FredStork added a post in a topic Luga Propellers   

    Lost in translation...
    Roman wrote to me : "SL106-1750mm(3-blades) propeller. The diameter is 1770 mm (with a hub with mounting slots at 101.6 mm)",
    and now you say "blade it says 1770, I ordered 1750 and it measures exactly 175 cm / 69in"... 
    Very confusing.... anyway, we are keen to here you feedback on this magnificent prop, it looks great! 
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