I am thinking about buying an omp profile edge 40 size to screw around with 'til I get my big edge goin'. I want to spend as little money as possible. Would a Towerhobbies .46 be a good engine? I would rather buy that than spend $120 for the OS. I was also looking at the magnum 46. It looks like a direct copy of the OS 46 FX and costs only $80.

Thanks

Buy you a Thunder tiger .46 then put on a tower muffler.

I am not trying to dog the tower motor. They crank some serious RPMS but I have seen several that didn't run to well in the midrange. Since this is going on a funfly, the midrange is where your going to spend most of your time flying.

If you can get the weight in the low 4lbs range. This is what I would chose. Thunder tiger run about in the mid $70 tower muffler is 13 if they have them in stock.

Think about a Mecoa 46. They are shipped out CA. You can get them for about $67 USD, and if you trade in an old worn out motor they will give you an additional discount. The Taiwan version of the Mecoa is the old OS SF. They bought the castings. They are available for a great price and perform great. You can usually see their ads in the AMA mag. Put a Tower muffler on it and you'll have a great performer for less $$$
Kevin

What is the deal with switching to a Tower Muffler? Is the Tower just an open shell type muffler, (like the old Fox) that is pretty loud, but allows high rev's??? How much increase would you get over the stock muffler on say....a Tiger .46 or ......a Irvine .53??.....errr does this muffler fit the Irvine .53???
Thanks!!!

I just sent the money out for a om 540p.i cant wait.im currently flying a sig se with a 46fx and a macs muffler.the plane weighs 5lbs and it will climb from a hover no problem.i cant imagine what it will do on a 4lb 540.i guess what ever motor you get will pull like crazy as long as it throttles good.good luck.
p.s. try magnums there strong and run smooth.

The tower muffler on a Thunder tiger .46 w/ a 11.5x4APC gave me 800 RPM.
Yes, it is a open type muffler w/ no back pressure. But I don't think it loud though. Not really louder than a stock muffler w/ baffle removed.

800RPM for $13 isn't bad.

The tower muffler has a smaller outlet than the fox mufflers, thereby somewhat quieter.

I just finished my 4th Edge buildup with the latest kit and used 4 HS-85MG servos plus one HS-81 for the throttle. Flying weight is 3 lbs. 14.5 oz and that's all stock built. So far these little jewel servos are working great. They are half the weight of standards and put out just as much torque. Very cool setup. I'll try to post pics later here and on the website. Battery pack is standard 600 mAH NiCad pack so more weight could be saved using a NiMH pack!

Mike Pilkenton

afsalmon you have to be carfull with those servos.i had them in my 40 gp cap and thats what caused it to go in.no i was not flying fast.the elev flutterd so i took them out and put standard servos inthere.them the wing flutterd,when it did it shatterd the servo and it went in.nothing i could do but watch.just thought i would worn you.good luck

Re. da King's comments:

Mike Mayberry (Hitec Factory Rep) has pretty much said the same thing....even for the Hitec 225 nylon gear servos in planes above 40 size.

AF Salmon, I did not want to say it Mike but I have had a less than positive experience with those servos. I wish you luck though. The throttle will be fine though. Jeff Williams

I've used these servos in all my fast sailplanes up to 3 meters with absolutely no problem. And the sailplanes are much faster (120 mph in dives) and have higher servo loads than a fun fly ever will. In fact I've never had a stripped gear, even in a crash. I think gear failures reported in association with flutter are stripped due to the flutter loads, and are not themselves the root cause of the flutter. Flutter is an aeroelastic effect which is caused by loose hinging, lack of gap seal, or improper aerodynamic design of the control surface. An efficient control surface at zero angle of attack should require very little holding torque and cause littel stress on the gears.
Also, aren't HS-85's really popular among competition fun flyers?

I would agree that the plastic gear version would be trouble as ther just isn't enough gear surface area to absorb the loads. But I did buy the MG version of the 85s with that in mind. Hey Jeff, what problems did you have? So far I have about 20-25 flights on the new plane with the 85MG servos and all is fine. Sure don't want to dork this plane though!

Mike

I can't speak for Jeff, but I have had nothing but nightmares with the HS205s & HS225s in 40 sizer Fun-Flys. I run these sucessfully in 160+ MPH pylon racers, but not in Fun Flys. I've lost a few Fun-Flys due to stripped gears, nylon & metal gear sets. I don't agree with an earlier statement of a glider puts more stress on their servos than a Fun-Fly - Obviously you haven't seen my Fun-Flys and the manuvers they are designed to perform! LOL.
Also remember that Fun-Fliers run high RPM engines that subject these servos to high frequency vibrations. We run giant scale servo arms that put more stress on the gear train of a servo, and we connect our control rods to their respective clevises as close as we can to the control surface to get +/- 70 plus degrees stroke. Then we put them in a Tornado 3D manuver with full deflection and full throttle just to watch it climb! STRESS? - I THINK SO! LOL
That is what Fun-Flys are all about!
Kevin

kevin4hsrmc.........i agree 110%....ive allso flown gliders and had no problem at all.but those surfaces are what 1/2inch maby 1inch at the most.i dont know about you but ive had ff with 5 inch ails...
not to mention the elevators.the only reason i say this is becuse i lost one plane becouse of it so if i save one other plane it will be worth it.
good luck

Wow, you guys are scarring me now. I had no idea trying these little jewels out could be potentially deadly to my airplane. I do remember using Hitec 225s in the ailerons on my old Fazer and then my first prototype Edge 540 and never had any problems with those. Maybe I was just lucky! Well if they fail then I'll just pull my ejection handle and bail out! ha ha ha

Salmon

kevin4hsrcm,

What servos you use for the 40 size funfly.

Thank you.

I test all of my 40 - Size Fun-Fly designs with std servos with sucess. I run the HiTec HS300s or MPI 400s. My personal 40-Size Fun-Flys, I run the MPI870s. They are an extreme overkill for a 40-size Fun-Fly, though awesome at 110 oz-in. torque, 0.1 response rate at 4.8V. Most of my customers are running stds. or the 425s & 545s HiTec servos in their 40-size FunFlys.
The extra dia. of the gear sets make a BIG difference in their longevity.
Kevin