mount 2 pvc junction boxes one of either side, one low one high, drill 80-90mm hole thru back of box and enclosure and use silicone to seal. drill bottom of box and install filters or fan guards, cold air in bottom hot out top
On Mon, Jul 16, 2018 at 2:16 PM, Sean Heskett <af...@zirkel.us> wrote: > the parachute is a pretty good idea, it has definitely saved lives and > driven sales for Cirrus since Textron (Cessna) just discontinued the TTx > which was Cirrus' main competition. > > as a pilot i have two problems with the parachute: > 1. cirrus came up with the idea in order for the FAA to certify the > aircraft because it has unstable spin characteristics. > https://aviation.stackexchange.com/questions/ > 22201/why-do-the-cirrus-sr-20-and-sr-22-have-the-caps-parachute-system > > 2. my other beef with the parachute is that it has caused some pilots to > have a false sense of security and not fly with enough altitude between > them and the granite clouds below (mountains) and there has been a couple > crashes in our area because of it. you can't fix stupid. > > having said that, i'd love to have a parachute in my airplane!!! > > -sean > > oh and for the original post, paint the box white and install fans!!! > > > > On Mon, Jul 16, 2018 at 12:20 PM, Jason McKemie < > j.mcke...@veloxinetbroadband.com> wrote: > >> While we're going OT here, the Cirrus Airframe Parachute System seems >> like a good idea, in theory at least. What do you guys think of that setup? >> >> >> On Monday, July 16, 2018, Bill Prince <part15...@gmail.com> wrote: >> >>> The Piaggio P.180 Avanti can do 400 knots for only $1.6 million. >>> >>> I've been in one. Nice bird. >>> >>> >>> bp >>> <part15sbs{at}gmail{dot}com> >>> >>> >>> On 7/16/2018 9:07 AM, Chuck McCown wrote: >>> >>> If I ever buy another plane I want it pressurized, certified for flight >>> in known ice and capable of doing 300 kts. >>> >>> *From:* Bill Prince >>> *Sent:* Monday, July 16, 2018 10:03 AM >>> *To:* af@af.afmug.com >>> *Subject:* Re: [AFMUG] How to reliably cool a small enclosure in direct >>> sunlight? >>> >>> >>> I sold it a few years ago. After we moved up into the mountains, the >>> round-trip time to the airport just made flying impractical (over an hour >>> each way). >>> >>> Yes. Same kind of plane. However JD made a number of bone-headed >>> decisions that made his demise all but a foregone conclusion. If we have a >>> few minutes at the computer museum, I can cover some of the more major bad >>> decisions that were made. Plus the fuel selector mechanism that had been >>> installed on that particular airplane was kind of a kluge on top of a Rube >>> Goldberg setup. Stupid. Stupid. Stupid. >>> >>> >>> >>> bp >>> <part15sbs{at}gmail{dot}com> >>> >>> >>> On 7/16/2018 8:57 AM, Chuck McCown wrote: >>> >>> Do you still have the plane? >>> Is that what John Denver was flying on his final trip? >>> >>> *From:* Bill Prince >>> *Sent:* Monday, July 16, 2018 9:44 AM >>> *To:* af@af.afmug.com >>> *Subject:* Re: [AFMUG] How to reliably cool a small enclosure in direct >>> sunlight? >>> >>> >>> When I was building the Long-EZ, there was a debate among fiberglass >>> airplane builders about the tolerable temperatures for ambient-temp cured >>> fiberglass/epoxy structures. The point being that too high heat would be >>> "very bad" for a fiberglass/epoxy airplane. >>> >>> So Burt Rutan and his crew did a bunch of tests using various colors. >>> What they found was that pure white had the lowest heat gain of any color. >>> Black the worst. Silver was right up there with gray. Almost any tint had a >>> significant heat gain over ambient. >>> >>> I painted my EZ pure white with no tints whatsoever. It did have >>> blue/gold trim colors, but the trim was basically just accent stripes on >>> the fuselage and winglets. >>> >>> >>> >>> bp >>> <part15sbs{at}gmail{dot}com> >>> >>> >>> On 7/16/2018 8:31 AM, Chuck McCown wrote: >>> >>> Foil or shiny silver stuff seems to draw more heat than black paint for >>> some reason. >>> >>> I think it is black in the infra red spectrum. >>> >>> Just leave a chrome plated wrench out in the sun for a few hours. >>> Black wrench will be much cooler. >>> You can actually pick up the black wrench but you can get a blister from >>> picking up and holding a chrome one. >>> >>> One of my kids still has a scar from the chrome tab of a car seat belt. >>> We knew she hated to be put in the car seat, figured all the screaming >>> was just the normal objections. >>> >>> *From:* Cameron Crum >>> *Sent:* Monday, July 16, 2018 9:24 AM >>> *To:* AnimalFarm Microwave Users Group >>> *Subject:* Re: [AFMUG] How to reliably cool a small enclosure in direct >>> sunlight? >>> >>> I wonder if the foil faced foam would work without having to paint and >>> stucco. >>> >>> Cameron >>> >>> On Mon, Jul 16, 2018 at 10:07 AM, Chuck McCown <ch...@wbmfg.com> wrote: >>> >>>> Doesn’t look like I emailed the test results to anyone. >>>> We started adding foam insulation with stucco and then white paint on >>>> the exterior of lots of stuff. >>>> An amazing combination. >>>> >>>> *From:* Chuck McCown >>>> *Sent:* Monday, July 16, 2018 9:00 AM >>>> *To:* AnimalFarm Microwave Users Group >>>> *Subject:* Re: [AFMUG] How to reliably cool a small enclosure in >>>> direct sunlight? >>>> >>>> Here is one snippit about exterior insulation: >>>> >>>> >>>> Infrared camera proved what I proved years ago. The exterior >>>> insulation >>>> does the trick. A wall in shade is the same temperature (inside) as a >>>> wall >>>> in sun. Therefore, false roof does not decrease heat flux. I spent >>>> one >>>> whole summer testing all these assertions. Multiple boxes with >>>> telemetry. >>>> Paint, sun shades, vents, etc etc. White paint and exterior insulation >>>> does >>>> the job. Nothing measurable came from adding a shade to that >>>> combination. >>>> >>>> But to prove it once again, I had Jeremy use the infrared camera to >>>> measure >>>> all the walls and ceiling in Ticaboo. Sunny walls were no warmer than >>>> those >>>> on the shade side. >>>> >>>> >>>> *From:* Lewis Bergman >>>> *Sent:* Monday, July 16, 2018 8:54 AM >>>> *To:* AnimalFarm Microwave Users Group >>>> *Subject:* Re: [AFMUG] How to reliably cool a small enclosure in >>>> direct sunlight? >>>> >>>> On peltier you also have to locate the power supply outside of the box. >>>> Or at least that is what I found. The heat load from the PS was always more >>>> than the peltier it powered could keep up with. Everything has a bit of >>>> inefficiency built in that shows up as heat. >>>> >>>> On Mon, Jul 16, 2018 at 9:52 AM Lewis Bergman <lewis.berg...@gmail.com> >>>> wrote: >>>> >>>>> Are you saying white paint outperformed heat shields? That's awesome >>>>> info. I always thought heart shields were the best. >>>>> >>>>> >>>>> On Fri, Jul 13, 2018, 7:43 PM <ch...@wbmfg.com> wrote: >>>>> >>>>>> I did a bunch of trials one summer testing a variety of methods >>>>>> including heat shields, exterior insulation, interior insulation, >>>>>> convection ventilation, forced ventilation, peltier effect active >>>>>> cooling. >>>>>> >>>>>> #1 by a long shot is painting the enclosure bright white. >>>>>> >>>>>> >>>>>> *From:* Bill Prince >>>>>> *Sent:* Friday, July 13, 2018 6:37 PM >>>>>> *To:* af@af.afmug.com >>>>>> *Subject:* Re: [AFMUG] How to reliably cool a small enclosure in >>>>>> direct sunlight? >>>>>> >>>>>> >>>>>> 1. Add a thermostatically controlled ventilation fan >>>>>> >>>>>> 2. Put a heat shield up on the south side of the enclosure. This can >>>>>> be just a plate of aluminum, painted white on the sun side, and mounted >>>>>> to >>>>>> the enclosure with 1" standoffs >>>>>> >>>>>> We have a site like yours, and just the fan keeps the temperature >>>>>> below 120° F (49° C). I think if we added the heat shield we could drop >>>>>> it >>>>>> another 10° F. >>>>>> >>>>>> >>>>>> >>>>>> bp >>>>>> <part15sbs{at}gmail{dot}com> >>>>>> >>>>>> >>>>>> On 7/13/2018 4:51 PM, Sterling Jacobson wrote: >>>>>> >>>>>> I’ve got a few side of the house enclosures exposed to direct >>>>>> sunlight part of the day. >>>>>> >>>>>> >>>>>> >>>>>> Inside the electronics are about ready to melt. Like 90C+ CPU temps. >>>>>> >>>>>> >>>>>> >>>>>> These are about 3’ x 3’ x 12 deep or something like that, so not a >>>>>> lot of room. >>>>>> >>>>>> >>>>>> >>>>>> What are you guys using to keep these things decently cool? >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> AF mailing list >>>>>> AF@af.afmug.com >>>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>>> -- >>>>>> AF mailing list >>>>>> AF@af.afmug.com >>>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>>> >>>>> ------------------------------ >>>> -- >>>> AF mailing list >>>> AF@af.afmug.com >>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>> >>>> -- >>>> AF mailing list >>>> AF@af.afmug.com >>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>> >>>> >>> ------------------------------ >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >>> >>> >>> ------------------------------ >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >>> >>> >>> ------------------------------ >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >>> >>> >>> >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > >
-- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
