I bought my first used gas plane, its a older 1/3 scale yellow and red hanger 9 sukhoi, it didnt have any manuel with it ,or any of the servos with it, so after building 60 size glow planes ,i always installed my throttle servo about midway back in the fuselodge so i used a 4-40 rod and installed my throttle the same location in this plane, but after viewing other planes this size and downloading a manuel for this plane online,the throttle servos seem to always be located closer to the front of the plane near the firewall! Am i ok leaving my servo where i put it, or is there a reason why the throttle servo is located different in larger scale planes and i should move mine up?

Further you can get it from any source of interference (esp the ignition module) the better.

If it works OK further back leave it there.

Terry

My observation is that on the larger planes, the servos are located closer to the ttask at hand to keep the connection tight and free of as much slop as you can. With that said, generally there no add'l "stresses" put on the throttle arm from wind, etc so I'm not sure why so many mount the throttle servo so close to the motor. Besides easier hookup by not having to go around foam encased tank for example, I'm not sure. Maybe it makes for a neater installations since the large planes can have add'l equipment like redundant batteries and other stuff not generally associated with smaller planes and it leaves more room.

If you go into the gas engine forum you can read up on most everything you want to know. With the advent of 2.4 RF can still happen but not like the days of 72. Something has to be very wrong to pick it up today. There were a couple of different thoughts about where to install the throttle servo. One thought was to install the servo close to the engine to keep it away from the RX. The other thinking was that the servo would pick up the noise and just send it along the servo wire to the RX. The other thinking was to mount the servo as far away from the ignition as you could get it. I have tried it both ways and gotten away with it. The one thing most people would tell you never to do is use a metal rod from your servo to the throttle. I always used Nyrod with ball swivels or plastic clevises.

Putting the servo aft is fine if thats where you like it but I agree with GB do not use a conductive push rod for the throttle. Thats the one and only application I prefer to use Ny-rod on.

John

Who makes nyrod (brands) cant seem to find anything that says nyrod pushrods ,looked on tower hobbies but cant really find anything!

Look for Golden Rods made by Sullivan.

http://www.sullivanproducts.com/GoldnRodContent.htm

Ken

Nyrod is just slang for nylon. It's real name is Golden Rod as Ken is showing. If you have a local hobby shop they have it hanging on a rack. It's the one thing I have found that almost every hobby shop stocks. The stuff has many uses so I try to have a couple packs on hand in my shop. The small inside tube can be used to route antennas and I use it a lot to route my pull/pull cables. The outer tube can also be used for a number of things but it's a bit brittle. It also comes in different colors or even clear.

Thanks for the info didnt know anything about these type rods! Seems they are mostly in 2-56 is that ok for larger type planes?

Yep, as long as you have the outer tube hard mounted in several places so it doesn't flex. I have mounted the throttle servo about 3 feet back and used Nyrod. It's not a new product, it has been used for many years for controls and throttles. Good stuff for throttles, not great for controls, OK, just not the best stuff.

No Manuel? With a Hanger 9 Imight expect a Chen or a Hsu instead of a Manuel, or even a <span class="family-name">J&uacute;lio</span>. ;-)

Even with 2.4GHz Iwould not tempt electric induction interference from the ignition module or spark being picked up by the servo rotor windings and being introduced into the receiver circuitry. It isn't a broadcast at that point - it's direct induction. Frequency doesn't matter. Keep throttle and choke servos at east 10" from the engine or ignition module on gassers.

RCS 1.40 electronic ignition. Throttle and choke servos mounted in cowl next to the ignition and engine. Zero RF. 6 years later, different plane, same engine and ignition. Throttle servo mounted 18 inches away. Got hammered by RF. Switched to PCM and no RF. You need to test things to see if they will or will not work. I have gotten lucky with different set ups in different planes, done everything you should not do and it worked, don't everything you should do and gotten bitten. If it doesn't work the way I have it I try something different. You do need to test 2.4 but it is a lot more forgiving the 72.

Lol sorry charlie!! "OWNERS MANUAL"!!!!!

I switched to 2.4 in late 2006, since that time I have run the throttle servos in all my gassers within 3" of the ignition modules with no issues and one of them has over 500 flights now. In fact, when I completed my 40% Carden 260, I ran two 2100 ma lipos into a Fromco two batteries in switch with three outputs and connected the two receivers and the ignition on the same switch. I flew that way for over 300 flights when I finally changed to a single power safe receiver and went with 7.4 V direct. 2.4 is a long ways from 72 and I always use a DA ignition module. In general, if you perform a good multi power setting rang check on the ground and all is working, then it is going to work in flight. It is that simple.

By the way, In the gas world, your best application for linkage is to use ball links on the carb and servo and a Pro link or a 4-40 all thread for the rod. just saying...

Bob

Only problem I have seen with what was thought to be RF with a 2.4 turned out to be a bad RX. It really does make it easier. The new one I have on my bench is going 2.4 just for the set up ease and I don't want to risk it getting shot down. All my planes get a radio check here at home with engine on and engine off before I bother going to the field with it. If it doesn't work here it isn't going to get any better at the field.

The golden rods are out of stock everywhere it seems ,are they in that high of demand??

They are in that low of demand more than likely. I still use them on my smaller kits, but most are going with what their ARF came with. Not nearly as many kits being built (per capita). They can bind or have anywhere from no slop to severe slop depending on the installation.

I will be out this week doing a road tripo to the LHS, I will be picking up a couple of packs to restock my shop. On line?? It always seems to be hanging on the LHS shelf.