<div style="margin: 0in 0in 0pt">I know this is an old thread, but this may be helpful for anyone who may be looking at buying a ready to fly park flyer.</div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt">In the US, both 27MHz and 49MHz are commonly used for toy-grade radio controlled vehicles.In my opinion the 27MHz band should not be used on any R/C that has the potential to cause personal injuries or property damage.If it flies I say 27MHz should NEVER be used.On the ground if it goes fast enough to hurt your foot if it hits you at full speed or if it is expensive and you don&rsquo;t want it to drive it self into the road, lake or some other potentially hazardous area stay away from 27MHz.Though FM is safer than AM, both are VERY VERY susceptible to RFI (radio frequency interference).</div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt">I can go into great detail as to why 27MHz is a bad idea, but for the sake of this forum and to keep this as short as possible I will forego the tech talk and just say this.The guy at the toy store or hobby shop may tell you that there is no interference problems but he is wrong, misleading you or just un-educated in the matter.</div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt">CB Radios used by truckers and citizens all over the USA run on 27MHz and when hooked up to a 10 meter radio amplifier (made to work on 28MHz and illegal to do) it causes &ldquo;splatter&rdquo; from 25Mhz to 30Mhz.</div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt">Anyone old enough to remember the days of watching T.V. using an antenna may remember the occasional interference.The picture gets messed up and the audio goes wacky.Some times you can even make out what the CBer is saying!</div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt">Trust me when I say a CB can and WILL take over your R/C car, boat, plane or train.</div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt">I have been a licensed radio operator for years; please take my word on this.It is worth the few extra dollars to get a 72MHz radio if you&rsquo;re in the air!</div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt">I used 50MHz in the past (must be licensed) but I found I had to worry about RFI at 50MHz too because some unlicensed or un-educated people operated 6 meter radios out of band.Uggg.</div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt"></div>