Hi all,

I have an 80" Spitfire that currently has an OS BGX-1 on it (35cc Nitro). I haven't flown it yet. Bought it from a friend who needed the money more than the plane.

I feel like doing something different with it power wise before I fly it. It needs a going thru anyways. I wanna put a gasser in it.

Anybody out there have a gasser Spit about the same size or have any ideas?

Is a BME 50 overkill? A DLE 30 too small?

Thanks in advance,

R21

What's the all up weight?

For what it's worth, I had a friend who had the Yellow Aircraft Spitfire and his was powered by a MOki 1.80.  It flew very well. I have a Yellow Aircraft P-47 , 82 inch span and around 25 lbs. I have a Moki 2.1 in it, and it also flies very well. Plenty fast enough for me and it will loop from level flight. 

What you have should fly it well, and should be easier to keep cowled in.

Dash

AWU is about 25 lbs.

It may be a little heaverier when it's all said and done depending on what has to be done for CG.


I think the BGX will be fine too, but if I can go gas I'd rather do that.

The problem with gas is the rather tight confines of the nose on the Spitfire. Assuming you are concerned about aesthetics of course. At 25 pounds or more I would say the DLE 30 may be a bit on the small side. Something like a DA-50 might be a better option.

Moki do a gas version of their 1.8 now... thats a perfect combo imo, I fly a BT Spitty with the glow 1.8 Moki and its perfect... I would like to see Moki release the 2.1 in gas also. Nice thing is the slim head profile of the Moki, it fits fully enclosed in the Spitty's nose...

25 lbs is pretty heavy for a 80" ws. I had a 80" Platt Zero with a OS 160 using a 17x10 prop at 8k and it did fine. I would look for something that would fit inside and spin a 20x10 at 7k or so. I know the spitty has a small frontal area but engine parts hanging out the front is ugly.

da 50 but 25 lbs that kind of heavy...?

You could test fly on the BGX and then decide. I did my first with a ST3000.

For gas a 45-50 should be fine at 80" I agree the Moki 1.8 gas is a better fit all considered.


My experiences:
Currently, 1/5 PicaMk-IX spit 88" at 25 lbs. has a Moki 2.10 Nitro and a 20-10 zinger pro. It is slightly faster than my buddies Yellow Mk14 with a DA50.
Hey Moki, switch over the 2.10 to gas...and hurry.

My first Pica Spit was at 26.5 lbs with a Super Tiger 3000. The ST3000 provided a good scale flight, but lacked the power for really large loops. Always add onboard glow for any nitro inverted.
I replaced with a Brison 3.2 (50 cc) afterwards and now my loops were big 800ft ones!

what hurts on both was nose weight. both weighed about 20 lbs, but then 5 and 5-1/2lbs on each required. But don't worry just make sure the CG is correct!!
balance gear up and no gas in the tank.

Have a YA P-47 with Brison 50 and it is very fast. But cowl allows hidding it.

Landings are great with a Spitfire.

R21,

Hobby People offers the Mark gas engines; made by the folks who originally made the Moki engines sold in America according to the Mark website. They are currently not in stock. I have thought about the engines before when trying to make a decision on what to buy. They look like they would fit very well in a slim nose plane. Hobby People also offers a backplate/radial mount and mufflers that would fit well in a cowl.

I have not come across any forum posts by people who own one. If you locate one and install it in a plane, please post it. It would be a great thread.

Evolution also offers gas engines with the same carb/muffler location on the engine.

Brian

I have a Brian Taylor 83" spitty with ZDZ 50cc and scale exhaust, 25lbs all up, and loving it. Mine used to have the ST 4500 and it was a little under powered for me, even running on a pump. I'm not a fan of Moki anymore, good power but are fuel hogs and leave oily messes. I used to have my Moki 210 inside a TF P51 and took it out after going to gassers for my warbirds. Just got tired of oily planes at the end of the day. Consider putting a DLE 55cc in it if the cowl can cover it.

IMO ,

because you have already installed the O.S. upfront,

try-it ! And then install a 30cc gas engine!
I don't have much experience with gassers but your AUW is not that much for a 50cc gasser,
unless you want extreme performance!

Kostas1

Go with Moki on no nitro fuel, mix your own using klotz oil and save a buck.