I'm converting a BH P-40C to P-36 configuration. I want to use a 20cc gasser. Weight might be a factor. Looking for a lighter one. The Zenoha G20 specs show a weight of 41 oz with muffler and ignition. The RCFG 20cc spec show weight of 38 oz with muffler and ignition. But I can't find a pitts type or rear dump muffler for the RCFG. Any other engines out there or suppliers of mufflers for the RCFG 20cc???

You're going to cut the nose off a P-40, add a cowl to make it a P-36, and you want a light engine? You may want to rethink that, it would be a real kick in the ***** to buy a lighter engine the have to put two pounds of lead in it to get it to balance.[:@]

I'm having a senior moment, what is a BH P-40?

The BH P-40 is Black Horse P-40C ARF. Looks like fairly good construction.

The airframe is pretty light so I think any 20cc gasser will be close enough that the plane can be balanced with battery placement. I certainly don't want to add weight.

http://www.hobbypeople.net/gallery/159560.asp

If I was going to go gas on this I would use a Ryobi 31ccor a McCullen 25cc. My friend uses a lot of McC's I've used Ryobis in three planes, the Ryobi is the smoothest gas engine you'll find I think, and they are dirt cheap. I've used them with the mag and with EI, EI makes them hand flipable and a little lighter, but for this plane I just take it out of the weedwacker, put a prop drive in front of the stock mag and fly. You can use the stock muffler it's quite and light. You can get Ryobi from Harbor Frieght reconditioned, (that means someone just returned it, the 4 I bought where all new), for $49 most the time.

I've heard of Ryobi but not McCullen. What do they come on?

CR

Chainsaws.

I've been doing some research on rcgf engines also. I understand they are coming out with a 20cc rear carb engine. Does anyone know if the cylinder can be rotated to face the muffler to the rear? The distributor said (on another thread) they are working on some rear dump mufflers for these engines. Been lots of requests. The SV26 has a rear carb and a wrap around rear dump muffler. http://www.rcshowcase.com/html/RCS/rcs26sv.html I'm seriously considering that one. Sold at RC Showcase.
Edwin

That SV26 looks like a nice compact engine. I have an SPE 26 in another airplane. I'm happy with it. It starts easy and runs good. However, I don't need that much power for this plane (I hope) and it is a little big and I would have to cut away a lot more of the cowling than I want to. However the SV has the carb in back and that would help with one less hole in the cowling.

Sure you don't mean McCullough?

CR

Yea, that's it.

I just got a confirmation from RCGF about the SV20 rear carb. He has one in house and is testing it. He says they are working on getting a wrap around rear dump muffler, a little ways in the future. He also says that the cylinder can be rotated to point the muffler to the rear but some work would need to be done on the cylinder skirt. I just may give that a try. Finally, some gas engines for 120 size planes.
Edwin

Hi Edwin Saw the 20cc fcfg rear carb yesterday. I believe henry said that he ran it on thursday.
Im new to gas so i dont know much . Is there any benifit carb in the rear

He had a good diplay of there rcfg engines. Will be speaking with him on monday about my order.I guess he will explain the differece. Friday I received my hanger 9 P-47, this is the plane I plan on putting it in

just dont the way to go rear or side

Its just a preference to me. Just my opinion. I am looking for a slim profile. I just sold a couple dynamax df systems today so I'll be getting in line to try out a 20cc. If it works ok in my rascal 110, I'll get a couple more for my 1/4 scale busa J3 and L4. The price of glow fuel has convinced me to start switching over to gas. My favorite planes right now are the rascal 110 and J3. He told me they should be available in a couple of weeks. Just need some deminsions now.
Edwin

Talking about planes, I just picked up a Topflight Corsair, I think this is a good home for about a 20cc engine ?? I'm going to do a little tweaking but I need the engine dimensions to decide side or rear carb.

Andy

I used to have one of those, great flying plane at 9 1/2 to 10 lbs. Has a really wicked stall if you get too slow, like most corsairs. I would think the side carb would be the best choice (just my opinion). If you go with a rear carb, the firewall would have to be moved way back or a deep pocket. The firewall is attached to the fuse sides. I wonder if the firewall would be durable since most gassers like an engine box built that is extended into the fuse and anchored to fuse formers. The rcfg web site shows a total width of 5.98" and a height of 5.6" for the side exhaust. I measured my spare cowl at 7.5" diameter at the firewall. Might work. Maybe with a wrap around rear dump muffler.
Edwin