I need a recommendation of what type of voltage regulator I need to run Lipo battery for my receiver and servos but no esc.</p>

What you are looking for is called a "BEC" or "UBec".

I use these

[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6313&Product_Name=Turnig y_MEGABEC_8_]Click me![/link]

And they work great.

Look around you'll find a lot of these available from many sources.

In my opinion, this just adds another pont of failure in the electrical path on-board theaircraft. If this devicefails in flight, and, because it is a component, it certainly will at one time or another, what happens then?</p>

Certainly not failsafe.</p>

Is there something wrong with the NiMh or NiCd packs?</p>

I currently use either one 1200 mah 6 volt NiMh pack or two 1200 6 volt NiMh packs on my glow planes. Basic battery, switch, receiver setup. The Voltwatch I preach about, is parallel to the battery packs and serves to monitor the battery pack voltage. I check it before and after each flight.</p>

I normally get at 6 flights per battery charge cycle and quite only becuase I've had enough. I could get more out of them, but I just don't force the issue. I would rather plug the packs into the field charger for an hour and take a rest or fly something else while it charges.</p>

Again, this is my opinion and not intended to challenge anyone, just to promote some thought on the subject.</p>

CGr.</p>

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If using a lipo for receiver.. you need to be careful of the voltage... you obviously won't be able to see the waring light indicator from the regulator  while your flying. Your plane could turn into a meteor during flight !

Well we disagree on this one.

Becs and Ubecs have been in use by the Electric set since the advent of 4S LiPo packs.

The older ESC's simply could not handle dealing with multiple servos unless you used a switching BEC.

These work reliably on electric planes. If anything they reduce the possiblity of failure due to overdraw situations or in case of current bumps.

Even the Spectrum systems provide a form of BEC type regulation with the use of smoothing capacitors.

The Giant Scalers are also switching over to LiPo's with regulators in many instances.
Even JR has succumbed and is selling LiPo setups for their newest and "best" stuff.

Europe has also embraced this with a vengance.

I've even been toying with LiPo with high end ( but very inexpensive ) Turnigy power systems for my Gasser's ignition.

I can fly much longer with this type of setup without worrying about my ignition systems failing.

Check these puppies out:

[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6313]MegaBec[/link]
[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=8355]Power System for Multiple Servos[/link]

The same would be true of other types of battery packs as well.

Well, I certainly see your point, and your experience factor lends to credibility on this issue.  </p>

The largest I fly is a couple of 120 size aircraft, two pattern types and one sport flyer (Tiger 120).  I've been using the NiMH and NiCd packs since I started and am somewhat reluctant to change over to something that I've been taught to avoid.  Old school, I realize, however, I still believe for the "smaller" aircraft, simple is best.  Adding the complexity of multiple power components in a basic configuration is somewhat more than needed for the average aircraft that most sport flyers put in the air.  </p>

We just don't see that many gasser's at our club.  I don't know why.  We have a very large area.. 3000 feet plus in length and about 300 yards wide (to the far tree line).  It's a full scale grass field that we use when the Forestry Department isn't putting out forest fires in the NJ Pine Barons.  So, we just don't see those complex power systems on our aircraft so most of us don't trust what we don't know.  You're helping to enlightening us, though.</p>

CGr</p>

I have lipos in my 120 planes. I can fly an entire weekend without thinking about a recharge. They are 2600mah but that's not even the point - two days of flying and I put the battery on a charger, and it only requires 550ma to recharge. Lipos are just much more efficient, not to mention they weigh less (yes, they still weigh a few ounces less even with the regulator).

I was just at a pattern meet in NJ and every glow powered plane I paid attention to had a regulated lipo system.

You can go to tech-aero.net and look at some regulators. Feel free to send an email or call if there is a phone number. I spoke with one of the guys that makes the regulators (they are made to order) and he took the time to talk to me on the phone and explain everything. You can tell them what you want to do and they will probably make it for you.

I'm sure they all had LiPo packs.

I'll stick with my NiMh packs.