RE: CMP BF109F BUILDING THREAD
 

Hello All,

I came across a web site that has some information on the Yellow 8 Me-109. It is called mission4today.com, it talks about a Yellow-8 being piloted by Oberfeldwebel Franz Jaenisch that was assigned to the Richthofen Geschwader JG2. If you click on the picture on the top right it shows the yellow-8- here is the link

http://mission4today.com/index.php?n...etails&id=4641


Also if you go here and click through the pictures you will find a drawing of the plane as well.

http://www.mission4today.com/index.p...s2&screen=6506


There is also some good information on color variations on all type of aircraft, and there are even color swatches for those scale builders here. You'll have to go to the home page and navigate through, but there is good stuff there.

http://www.ipmsstockholm.org/magazin...file_bf109.htm


Hope this helps.

RE: CMP BF109F BUILDING THREAD
 

You may keep looking, but I don't think there is any information on an actual yellow 8 B-109F. Some of your info is on the much different looking E model. The computer game skin appears to be an F and is a close match. I found it better just to remove the yellow 8 and find my own scheme.

RE: CMP BF109F BUILDING THREAD
 

I know what you mean, it's alleged to be a picture of a 109E-4 of the famous Richthofen Geschwader, JG2, at the time of the Battle of Britain piloted by Oberfeldwebel Franz Jaenisch.

It's just that I'm afraid to start making changes on the paint scheme as I am not that great a modeler. I remember reading some where in the thread how you removed the number, but I am afraid I will end up going down to the bare fuse and really screw it up.

Great looking plane by the way. How many flights do you have on it now?

How does it handle?

Any issues with the any of the mods you made?

I shouldl be starting mine a a couple of weeks once I finish a Nitroplanes Tucano I am building; I can't wait to get going on the build.


Regards,

Cesar

RE: CMP BF109F BUILDING THREAD
 

I have about one dozen flights on the plane. It handles great in the air and tracks like it is on rails. I'm still finding that the landings can be challenging as I get the right combination of flaps and engine idle. My last flight was the first time I landed it without a head wind, and I found that the full flaps and air brakes are not enough to slow it down unless I get the big 17X10 prop idled down a bit. As I get the engine set better and get a few more flights on it I should be more comfortable with the landings.

As for the mods, I'm happy with everything I have done. The opening for engine cooling seems to be working well and the exit flap even held up through a belly landing the other day. My retract valve vibrated loose causing the gear to stay up. After the mods I made the controls are tight and I see no evidence of flutter even when wide open at 120 mph. I had to glue the williams bros. wheels onto the rims since one popped off during a landing, but other than that I have had no problems. I was a bit worried about how it would handle with full flaps deployed, but it seems to be fine.

RE: CMP BF109F BUILDING THREAD
 

Great News. Thanks for the update.

RE: CMP BF109F BUILDING THREAD
 

I really like your version of this ARF Todd, I might have to do a little copying of your paint scheme .:D

RE: CMP BF109F BUILDING THREAD
 

Looks excellent!

Is that the stock spinner repainted ?

RE: CMP BF109F BUILDING THREAD
 

That is a Dave Platt spinner. Made from a nylon material with an aluminum back plate. Slightly smaller than the stock one but a bit more scale profile. It is sturdy and has survived one nose over without a problem (first flight due to up elevator trim needed). I had to make my own spinner adaptor for it though, not an easy task if you don't have some machining capability.

RE: CMP BF109F BUILDING THREAD
 

Hello Todd,

Tried fast taxiing to see if the plane would handle right. It took off, and I closed the throttle. Never do that!! I should have pulled through. Now it came down in the high grass. The landing gear was pulled out, and the struts slightly bend. On the bright side. The plane didn't stall at low speed. The Sierra gear was undamaged, and thanks to the perfect service from Darrell from Sierra I got replacement struts in three days from the US to Europe. Thumbs up. The plane was undamaged. As all was standard, I now strengthened the landing gear wood. (hard wood now) and made room for 4 inch wheels.
I'll be ready in a few days, and take off again.
Now Todd, did you use the supplied fuel tank, and how much flying time did you get out of it. Just an indication for me as when to take my plane down again.

Regards,

Eric Schumacher, Netherlands.

RE: CMP BF109F BUILDING THREAD
 

I never perform those "taxi" tests. When the conditions are right I take off and fly on my first run up.

I did notice that it will jump off the runway early, but I have always had plenty of power to pull it out of it. Now that I have it trimmed I do not have that problem too often.

I did use the supplied fuel tank. My engine is still a bit rich so I'm being careful on the run time. I can get 6 min. with quite a bit of fuel left. I'd say about 7 min. may be my timer setting once I get the engine set right. Keep in mind with a OS 1.60 and a 17X10 prop it flies very fast at half throttle, so I do not figure I'll be wide open for much of the flight. I never like long flights anyway. I usually take 4 or 5 planes at a time so I want to put something else up.

RE: CMP BF109F BUILDING THREAD
 

Will a OS 120 4 stroke with pump be able to fly this 109??

Need to know soon

RE: CMP BF109F BUILDING THREAD
 

Motoadve, while I am sure an OS 120 pumped would pull this bird into the sky, I think it might be a bit underpowered to push it around the skywith authority. Alot of it will depend on how heavy yours comes in after completion. Once you start adding some additional epoxy glue around the formers, qualityservos (heavier), retracts, betterwheels, a modification here or there such as upgrading the control systems with heavier duty rods or beefing the front engine compartment, you'll be adding acouple pounds at least.

From what I have read,and someone please correctme if I'm wrong,the smallest engine I've seen put in one is a 1.60 size. The few members that have actually gotten their birds into the air have had 1.60 size engines in them and they say it does very well in the air.

I myself purchased an OS 1.60 for mine. I hope to start the build in a few weeks once I finish a couple of projects I had already started before this one. It is better to have more power than needed, than to not have enough.

Hope this helps - good luck on your build.

RE: CMP BF109F BUILDING THREAD
 

For a 4 stroke, an OS 120 would fly the plane, but your prop size is gonna be kinda small maybe. Im running a saito 125 with a 15x8 MAS propat 8500 rpmson a 60 size 64" wingspan P-51 that weighs 10 pounds.
My CMPME-109 came out to 17 pounds, but its electric so battery weight makes it heavier, but its also spinning an 18x12 prop. Im betting this plane could come in at 15 pounds safely with a glow motor, but, Im not sure Id be comfortable using only a 15x8 size prop. My KMP ME-109 is the same size(73"ws)and weighs 1.5 pounds LESS at 13.5 and is using a saito 180 with a 16x8 prop.

You'll be ok flying, but your not going to get much vertical and it will take you a bit longer to get off the ground with a 15" diameter prop as compared to a larger one producing more thrust. However, if you went to a 16x6 prop, you'll do better with thrust, but your top end speed is going to suffer.

RE: CMP BF109F BUILDING THREAD
 

Hey, everyone!</p>

I maidened my 109 this afternoon! I bought it from Nitroplanes on the after thanksgiving sale for $237.  I am running the Dave Patrick Blue Head 1.80 with 18X8 prop.  I have 10 standard servos on the flight surfaces and air up, air down, robart retracts. I mounted the tank and all the accessories in the wing just like Scalecraft did, Thanks Steve!  I also copied your hidden elevator control rod, Thanks again!  The plane was a bit squirrelly on taxing on our grass field, the tail kept wanting to lift.  Hit the throttle and rolled about 30 feet and climbed to about 300 feet.  It flew great mostly at about quarter throttle, a little overpowered!  Made a few passes and floated in nicely into a 15 mph headwind to a perfect landing. Wonderfull plane!</p>

RE: CMP BF109F BUILDING THREAD
 

Ok will put a Saito 150 I have.
Will need to go inverted, how do I avoid the engine from quitting in flight?
I have had bad experiences with inverted 4 strokes , whats the trick to it?
To be reliable

RE: CMP BF109F BUILDING THREAD
 

Mine flies well withthe OS AX 120 with a 16 x 8 prop. At the moment the plane is under repair for some undercarriage mods. Strengthening and also larger wheels.

Eric Schumacher, netherlands

RE: CMP BF109F BUILDING THREAD
 

I have no problems with inverted four strokes.  Try to get the tank mounted low so you don't have a big pressure difference.  If the tank is high in relation to the carb you can still get good performance, just set the needle on the rich side for the beginning of the flight so the engine will not lean out as the tank goes down.  Four strokes can run a bit rich and not die, unlike two strokes that may load up on you.

RE: CMP BF109F BUILDING THREAD
 

Anyone know what a good thrust to weight ratio should be for this particular model?  I just did a simple calculation for static thrust for a Saito 4-Stroke FA-180 engine and I calculate about 16 - 17 pounds of static thrust.  I weighed all of my parts (I'm still building) and added in the weight of fuel and the engine, and I get about 17 pounds - which includes retracts, batteries, servos, etc.  This would give me about a 1:1 Thrust to Weight ratio.  You typcially find high T/W ratios on 3D flyers and not warbirds.  Anyone have some thoughts about the size engine I should buy?  I don't want something that is too large (both physical and performance), but I don't want to invest time and money on something that will barely do the job.</p>

I'm almost ready to install my engine - I want to beef up the mount as suggested in this thread - have a great weekend.  Good thing I'm not planning on flying this weekend - our Tucson monsoon season started really early!</p>

Thanks</p>

Bert</p>

RE: CMP BF109F BUILDING THREAD
 

I highly recommend using an onboard glow and set to keep the plug hot up to at least 1/2 throttle.

RE: CMP BF109F BUILDING THREAD
 

RE: CMP BF109F BUILDING THREAD
 

Hey Scalecraft,</p>

Have you flown your 109 with the "L/E slat" wing yet? </p>

I cracked out the kit yesterday while my dad is up, and i also had one of my flying buddies with me and they were just  drooling over the 109 kit. Kinda make's me think i should pull the finger out get it up and flying one of these days:)</p>

Thanks</p>

dave</p>

RE: CMP BF109F BUILDING THREAD
 

Not yet. Entire garage and workshop still in an overseas container sitting in the backyard. But the drywallers just finished today. Paint and start to put shop back together. Then I can build/play again. Well, after I finish the master suite. The wife may get upset if I work on my planes when there is no bathroom. 30 more days??

Steve
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RE: CMP BF109F BUILDING THREAD
 

Sheeted and covered again after wheel modification.
Stronger and larger for our grass field, and also a bit more forward.

Eric Schumacher, Netherlands

RE: CMP BF109F BUILDING THREAD
 

After quite a few flights I now feel very comfortable with the way my BF109 flies and it is one of my favorite planes to take to the field. I did a bit more beefing up of the engine mount area and had to add a bit of lead to the tail to compensate, but other than that there has not been much Ihad to do. I have found that the full "air brakes" are often needed to slow the plane up unless Ihave a pretty good head wind. I have yet to get it on the radar gun, but I would guess it flies at about 120 mph wide open. Since Iused the stock tank I don't have a lot of fuel for the 160FX, but I find that half throttle provides plenty of speed with the 17X10 prop. Here are a couple of recent photos a freind took yesterday.

</p>

RE: CMP BF109F BUILDING THREAD
 

Awesome photos.