We need more info. Do you ever plan on ifr? If so a TSO’d GPS is not mandatory, but nearly so today. If you do get one it can be the GPS source for ADSB. If just vfr, Trig, GRT, others, sell a remote gps suitable for adsb. Then you can choose a mode S transponder like the remote Trig TT-22 (mode S-ES), or a very inexpensive mode C Garmin 327 (used $400) plus a UAT. You’ll need an altitude encoder, too, if you don’t have one. Do you want an EFIS? A G5, GRT mini, etc will also have an encoder. Do you want ADSB-in? How will you display the data? Think in terms of a system, what will work with what, what costs more, what less. Don’t buy anything before figuring out what the total system costs, if everything works together, etc.
Just in case you don’t get it, the previous poster put up the chart around KAPC, showing:
The 330 is a Mode S transponder only, you would still need a certified GPS source and an altitude encoder to interface to it.
I recommend you stop and take a breath. Don’t first look at boxes, instead define the capability you want/need.
I don’t know Carl. The ForeFlight map,weather,traffic display and audio alerts with an IPad and Sentry is awesome compared to my MGL EFIS.
I do not consider an iPad reliable in the cockpit. I’ve had them turn off from heat.
My mission is just yank and bank VFR in LA airspace. In two years it’s been very stable. It’s Velcro‘ed to the panel. The only overheat warning I experienced was parked with it on in the sun. The great thing is even if it failed completely I can connect it to my iPhone instead. if I did it again I’d put an even bigger iPad in the middle and a smaller EFIS on the side.
Since panel space is tight on the 4, you might want to consider using an old Rocky Mountain uEncoder for the encoder. It fits in a 3.125" instrument hole. I will also give you airspeed, altimeter, VSI & OAT in one instrument [nice small back up for the primary of these instruments] See the link below for more info.
Like Carl, I've had iPads overheat in the Florida summer heat. That said, if you want to try one, Kitplanes wrote a nice article on how to build a DIY cooler for the iPad. If interested, shoot me your email address via "conversation" and I'll email the article to you.
Sorry but only a true hard core Garmin hater could possibly think the above is better solution to the one box solution I suggested above.
Walt, I’m honestly a bit offended. How can you call me a Garmin hater when I recommended he buy a Garmin? Albeit a different one. The OP refuses to remove his iPad from the panel (wouldn’t be my choice, but that doesn’t mean I’m an Apple hater) so I read him as looking for a lower cost solution, which I offered. The 335 is a fine solution, as far as I know. But for most of us, cost is always a factor in judging what is a ‘better solution’.
I listed the cost for a trig TT22 based system, and it’s a few hundred dollars less than the 335. The real savings can be had going the UAT route, because good, solid Garmin mode C 327’s can be had for $500. The market is flooded with them, traded in for mode S-ES units.
The 327 was a fine unit but has been around a long time, not really economical to repair anymore (I have to adjust output frequency on at least half the units that I test because they drift). The new units seem to be bulletproof so far (just don’t run them without an antenna connected).
