Hi guys I posted this in the warbird section but got no response so sorry for the double post.I'm looking to make the jump to Gas but i'm not sure whatall is needed.

Does anyone have experience with the ESM Bearcat? How does it fly?<a href="http://www.troybuiltmodels.com/items/ESMF8FBEARCAT71-C.html">

</a><font color="#00265e">http://www.troybuiltmodels.com/items/ESMF8FBEARCAT71-C.html</font>

I was looking to use the Aerovate 25cc engine. Will it be enough?
<font color="#00265e">http://www.troybuiltmodels.com/items/AEROVATE26R.html</font>

I see a IBEF is included and to be used in a spare(aux) channel in the reciever, but if it uses the same battery as the servos how do you determine what size battery you need for all?
<font color="#00265e">http://www.troybuiltmodels.com/ns/items/WRCIBEF.html</font>


Any advice,opinionsor help would be great!

Thanks.

Hello Drude,

A friend of mine bought the same plane not too long ago. If I'm not mistaken he bought either a 26 or 28 cc plane for his. He hasn't finished his plane yet, but I'd think the Aerovate 25 will be fine. The engine manufacturer should be able to recommend what size battery to use based on the ingition module they use.

One thing I'd recommend is that you use a separate battery for the ignition system. It's just a little cheap insurance to ensure your plane is still operational if the ingition battery fails or drops too low during a flight.

Just my 2 cents worth.

Get a larger engine. The plane needs a lot of weight up front and you can add a larger engine or weight. I would try and go with a 26 cc or larger. The Evo 26 would be a good choice. Anything heavy


Jeff

Thanks guys!
I will definitely use a separate battery for the ignition, thanks for the heads up!Safe is good! Ok, I feel better about going with the 26cc.
hrrcflyer, did your friend go with the optional retracts or use the ones that came with it? Would like to hear about how it flys.

I helped a friend build my ESM Bearcat kit I sold him. It is the full composite kit. He fitted a DL-55 up front spinning a 22x8 prop. Due to the fact that the engine sits on the supplied standoff's, he couldn't fit e pitts muffler, so he got a header pipe and cut it short running straight out the bottom of the cowl. Loud? Extremely. Overpowered? Extremely? Hard to fly? Not at all. Even with the DL-55 up front, we still needed to add about 800 grams (2lbs) of lead on a plywood plate over the top of the engine to balance the plane.
If I had the kit over again (it would be the built up wing/tailplane) I would go with a DL-30 or a MVVS (Evo) 45cc. You need to re-inforce the firewall to fuselage join with some glass and resin, making sure you get right down into the bottom (use someone with small hands). I can't comment on the Aerovate 26cc engines as I have not seen them in use, but Bearcats should go at a reasonable speed. By the way, with the 55 and a 22x8 the plane is not fast, it just has heaps of thrust and can pull an awesome verticle upline. I would run a 20x10 for a bit more speed myself. Cheers,
Dave

Thanks Dave! Great info!
As far asre inforcing the firewall do you think 30 epoxy would be stong enough or should Ijust useglass? I would like to get as much speed out of it as i can withthe 26cc i'll make sure I pick up a bunch of different size props.

Thanks again guys.

To be honest the firewall souldn't need reinforcing with a 26cc gas engine. They aren't that different to the 120-150 size four stroke engines the plane was built for. The re-inforcing was done with the 55cc due to large amounts of thrust/torque. If you do strengthen the firewall at all, use heavy cloth (around 6 oz) and resin. You want to build a fillet type join between the back of the firewall and the sides of the fuselage. The ply firewall is simpy glued to the back of the fibreglass firewall at the factory. By strenghtening the join around the edge you are trying to spraed the load from the engine into the fuselage. Without strengthening and a large powerful engine the firewall will eventually stress crack and break away for the fuselage. Cheers,
Dave

Thanks Dave!

Drude,

My friend bought the optional retracts, with struts and wheels and I have to admit they look awesome and items appear to be on par with Robart units even though the price is considerably less.

David