meowy84

Hello. I read on here that RCGF (I think it was RCGF...could be wrong though) was coming out with a front carb version of their 20cc gas engine to fit in narrow cowls. Is it here yet? If not then is anyone else aware of a 20cc or under engine available with an inline carb/exhaust setup?

Tired Old Man

My Feedback: (1)

Mark Engines makes a front carb 26. The old Moki manufacturer.

mitchmcf

Thay have a rear carb 20cc and a side carb 20cc .

Piston

My Feedback: (1)

Hey all

Aerovate engines does not have any plans to produce a front carbed version for any of our engine sizes.

The rear version 20cc was produced to give a much narrower profile than the side carbed. To have 3 versions of the same engine would not make economic sense.

The engineering time would better be spent on other more profitable projects. In fact that is what we are doing. Us Aerovate guys are spending our time making production and power improvements to our current line up, and tweaking the new engines that we are almost ready to bring to market... and none of them front carbed.

I hope the puts to rest any rumors out there. I would be more than happy to respond to any private messages from the guys.

Cheers
Henry

meowy84

Thanks for the responses/clarification guys and the pics. Did this engine just come out, because I don't see it listed on the zrcgf.com website. Only their side carb 20cc is listed.

Does the rear carb and side carb have the same carburator? I assume the overall design is the same as the side carb version?Also where can I get some dimensions on this rear carb engine? I'd like to know the height from bottom of crankcase/mounting lugs to top of spark plug and also the width with and without the muffler.

Also, are there any other 20cc and smaller rear carb or front carb engines available on the market right now?

Thanks in advance.

spasmatic

My Feedback: (4)

Good luck on your search for measurements. I tried for three weeks and never got an answer.

meowy84

Hey spasmatic, aybe Piston can help us out.

mitchmcf

Thay have them listed now and the specs are the same as the side carb but for the depth

spasmatic

My Feedback: (4)

Mitchmf, Would you know the depth since you have ordered one. Have you received it yet? I even sent a PM to Piston about the measurements and he was going to get back with me but it never happened.

mitchmcf

Still wating for mine but Henry said The distance from the prop hub to the firewall on the Aerovate rear carb 20cc is ........5 1/2" exactly.
He is in Toledo this weekend so dont know if he will get pms till he gets back.

rmh

Front carb setups have cantilever crankshafts -a completely different setup than th elittle "leaf blower " type engines use.
The gassers using front carbs, are glow engines with different sleeves,pistons(?) needle bearings and a pumper carb
The Moki /Mark- runs well but -power on all of these small engines is woefully short of the same designs on alky and nitrobased fuels
The problem isn't the engines -it's simply that the diffeent operating requirements of alky vs gasoline make very small gasoline engines quite low -comparitively to alky/nitro setups .
The best of the bunch in these small engines -powerwise -have either front or rear rotary valves .

meowy84

Mitchmcf, what do you mean by the 'depth'? Are you referring to the width of the engine or the height from say bottom of mounting lugs to top of sparkplug. And you're right, I checked rcgf.com and the rear carb engine is now listed but when you click on 'Details' it stilll transfers you to the side carb 20cc engine spec sheet. Geeeee, how helpful.[:'(]

As a customer, I definitely wouldn't want to inconvenience rcgf by my silly questions since according to Piston their time would be "better spent on other more profitable projects".

mitchmcf

Depth = rear of carb to prop hub

spasmatic

My Feedback: (4)

After I made the comment about having a problem finding measurements, Henry e-mailed me that he had sent them several days ago. My e-mail may have messed up or somewhere in between, but I never got them. He said he would resend them after he got back from Toledo and I appreciate he is following the threads. I think it would be better to post them on the thread so everyone could see them. When you go by pictures of an engine it isn't easy to figure if it will fit your model. I am personally waiting for the dimensions so I can complete the front of my Flying King.

meowy84

Mitchmcf, ah I see (about the depth). But what about the other dimensions? You mentioned that the other dimensions are the same as the side carb unit but they can't be because with the carb out of the way so to speak the width of this engine (carb to exhaust) has to be different than the side carb version. The height could be the same but the width is now reduced by the width of the carb. So basically what I would still like to find out is the width from the side of the fins to the outside od the muffler. I wouldn't also mind finding the width of the cylinder head itself (not counting the muffler).

Why the heck doesn't RCGF just post these dimensions on their website and make it a heck of alot easier for potential customers?

mitchmcf

If I ever get mine I will post the dimensions for you.

meowy84

mitchmcf, I'd really appreciate that. I assumed that you already had one because of the pics you posted, my mistake. Cheers.

SRimer

How about some numbers prop/rpm

mitchmcf

heres the dimensions for the 20cc.

meowy84

mitchmcf, that's exactly what I was looking for. Where did you unearth those? Thanks again.

Piston

My Feedback: (1)

Hey All

The 20cc Rear Carb manual is online as we speak!

[link=http://www.zrcgf.com/pages/manuals.cfm]Aerovate 20cc Rear Carb Manual[/link]

Cheers
Henry

mitchmcf

Now you know where LOL.

AJsToyz

If you mount it on a fan boat carb facing the front with a pusher prop, it would be a front carb engine !

RBean

I recently got an RCGF 20cc engine from Henry at RC Aero Products. This is the side carb one. It started easy and needles adjusted easy. With a 15-7 three blade prop its turning 8,300 rpm and this is still during break in with a 30 to one fuel mix and still slightly rich. Only problem is what I think is too much vibration at idle and slightly above. This may get better with leaning the low mixture. This engine has plenty of power. I have it in a scale P-36 (a P-40 converted to radial engine P-36 just so I could use a gas engine). And now they have a rear carb version. If there is a pits type or similar muffler available this might work in my Top Flight P-40.

I have read that one should try to keep the max static rpm at around 8,000. I'm expecting addition rpm with leaning and 40 to one fuel mix. Should I go to a bigger prop maybe a 16-7 or 16-8 three blade??

Piston

My Feedback: (1)

Hey RBean

The vibration may be the cause of an imbalance in the prop.

[link=http://www.zrcgf.com/pages/files/3 Blade Prop Balancing Technique.pdf]3 blade prop balancing[/link]

Check this article out. It may be your solution to the vibration.

The rpm's that the engine is putting out is pretty good! And as you state, it will improve as you break it in and change over to synthetic. A larger 3 bladed prop would be interesting to learn about. I for one would be very interested in your testing results using the larger blades.

Cheers
Henry