RE: CMP BF109F BUILDING THREAD
 

Steve,
The assembly looks right however if you mount directly to the wood you'll be off vertical center by the thickness of the plates you aren't putting below the lugs. You still have to cut the plate in half and install the engine on top of the 4 half plates. If you decide later to go with the pads you might harden the ply with thin CA.
Bob Q.

RE: CMP BF109F BUILDING THREAD
 

I recently received my CMP BF109F, and I look forward to start working on it. would like to install all servos, battery, receiver, retracts etc. and see how much weight is needed in the nose to balance it. Then decide on engine. I guess the factory recommendation on engine size is minimum.

Up till now my planes have had engines not greater than .90. Looking at the engine compartment I wonder if any reinforcements or extra glueing is needed. There is little glue on some of the joints, and the ply is not very thick in places.

Any views on this?

Thanks,
Helge.

RE: CMP BF109F BUILDING THREAD
 

Steve,
Here's how you keep the posts from vibrating into the wood.
1. Determine the thickness of the lower pad.
2. Trim each of the 4 standoffs by the thickness of the lower pad.
3. Using the elastomeric pads assemble the pad and the cut lower pad, lining the both of them up. Then drill a second hole in the pad, using the elastomeric pad as a guide.
4. Do this for the 3 remaining cut pads
5. Assemble the mount as you have shown, only rotate the lower cut and drilled pad 180 degrees so it is under the trimmed spacer.
6. And presto, you have spread the force over a wider area.

Bob Q.

RE: CMP BF109F BUILDING THREAD
 

Hot Rod Todd,

I haven't had a 2 cycle glow engine in awhile ( been playing with gas ! ) how easy are the O.S.1.60's to start and run ? I like the fact that the engine can be hidden away without cutting the cowl all up . I'd prefer putting gas in it but ....? Also , with that big spinner I can see problems with a starter slipping off and breaking something ( previous experience ! ).

Thanks, Dick

RE: CMP BF109F BUILDING THREAD
 

HR Todd,
I have a flying buddy that has an OS 1.60 in a clipped wing monocoupe he uses a pair of HEAVY gloves to hand start the engine. It starts first or second flip every time.IMHO I don't think you can do better than an OS. One things that you need to be aware of is that it loves lots of glow fuel.
Bob Q.

RE: CMP BF109F BUILDING THREAD
 

Hi All

All of my 2 stroke OS engines can be started by back flipping the spinner. Try it, you'll see.

Also, HVACMAN and I may make some replacement parts for this 109. What do you guys think about that. ??

Steve

RE: CMP BF109F BUILDING THREAD
 

replacement parts like what?

RE: CMP BF109F BUILDING THREAD
 

kahlog,

I'm making a mold of the chin scoop so I can have a supply of extra ones if I loose it or want to put an electric motor, but mostly because CMP parts are not plentiful.

If I like the model and I can get HVACMAN to help me out, I may make an epoxy composite one after some corrections and more detail. But then again, I want to mold everything.


Steve

RE: CMP BF109F BUILDING THREAD
 

cool. I sure hope my retracts show up tomorrow. Quite bummed I couldnt take the plane to Warbirds over the Rockies, but anyways.................

RE: CMP BF109F BUILDING THREAD
 

How was it? How many planes were you able to take?
Link us to the photos, good man.

RE: CMP BF109F BUILDING THREAD
 

I took 7 planes total:
KMP ME-109
H9 1.50 P-51
Kyosho 90 Spitfire(german markings)
80" B-17
90mm df size F-86(german markings)
RClander F9F panther
Hobby-lobby F-4

I have some pics yes. Will download them from camera tomorrow which will include shots of FULL SCALE fly-overs of a Hawker Sea Fury and an AT6- Texan.

The event was decent. Had about 135 registered pilots....most with at least 3-4 planes each. We also had live pyro shows along with some of the scheduled formation flights.
This included flak style fireworks and a host of explosives representing bomb hits on the "target"

RE: CMP BF109F BUILDING THREAD
 

The OS 1.60 in my Ki-61 starts by hand no problem. I do wear leather gloves since I use a sharp APC prop. It is quite thirsty for glow fuel. Looks like running it inverted will allow the head to stick out giving it plenty of cooling in the BF-109.

RE: CMP BF109F BUILDING THREAD
 

Hello Kahloq,

These Sierra retracts you get, are they the air-up, air down type. Or the air-up spring down type. The reason I ask is that the supplied air system with the kit is for the one-way spring down type.

Regards,

Eric Schumacher, Netherlands

RE: CMP BF109F BUILDING THREAD
 

Huh?? No supplied air system with any CMP kit I have ever seen, including the BF-109. The Sierra retracts are air-up, air-down. I am going to use a robart deluxe kit to power mine. I'm just waiting for Kahloq to get his and make sure they work OK before I order a set. I'm not worried about the retract strut length since I will be using a 17" prop, but those with the big electrics and a two blade may have clearance problems.

RE: CMP BF109F BUILDING THREAD
 

glued up the wing front pins last night... bit of a pain to do, how did you do yours? I drilled a pair of holes into the firewall to gain access to the back of the locating holes in the fuselage, then placed the wing into the fuselage and marked them through the holes you need to be very accurate with them to fit correctly

RE: CMP BF109F BUILDING THREAD
 

Just emailed Doug from Lado retracts to get some coment about if any would fit this plane, I like the look of his system

RE: CMP BF109F BUILDING THREAD
 

I have the LAdo 90deg rotating retracts and love them, but they are designed for .60 sized planes.
You'll need to drill out part of the unit to accept a larger diameter strut. Otherwise, they are a great product ! ;)

RE: CMP BF109F BUILDING THREAD
 

Hello Hot Rod Todd,

I got the Jamara version of the plane. Look at www.jamara.de. It is the CMP 109, even the box is the same, and on the plane are the CMPro signs. The pneumatic retracts are already build in. It is a air-up, spring down version. It includes also the complete air kit. I'm not sure of the quality because it retails at € 300,- total over here in Europe . I plan to use the Sierra retracts, so i'll need the Robart kit also. I'll use a 16x8 two blade, or a 15x8 three blade on my OS 120 AX. So I also don't expect ground clearance problems.

Regards,

Eric Schumacher, Netherlands.

RE: CMP BF109F BUILDING THREAD
 

Schummie...so the supplied gear in the Jamara kit is wire struts then?

Now...I just got the retracts today. Test fit they look good and fit with no modifications except possibly needing to sand down the insides of the retract rails in the wing as they are quite snug.
These gear have the forward strut angle built in so they fit the strut channel in the wing without any changes needed.

RE: CMP BF109F BUILDING THREAD
 

I am very interested in this plane.. I have a set of retracts from my dimised dave platt 109. I am not sure of the brand..Maye robinair?? Just wonder how they would fit in the wing of the cmp.. I think the dave platt wingspan was 78"-80" or so.. Any dimensions??Thanks chad.

RE: CMP BF109F BUILDING THREAD
 

Kahloq, glad to see you got the retracts. I'd like to see how they look with the Williams bros. wheels mounted. I'm interested in how they angle up into the wells since they have a bit of angle in the down position. I will order a set once I know Sierra got them right with yours. Thanks for being the trend setter!

Taildragger, The Platt 109 has a larger wing, the CMP is only about 73" The fuse is very close in size, and I even ordered a spinner from Dave since I believe they are identical in size. I'll post pics of the spinner when I get it next to the stock one. How the retracts fit will depend on how the Platt wing is set up. I would imagine you could make them work even if they do not fit perfect.

RE: CMP BF109F BUILDING THREAD
 

Ramstien44,
It looks like you're rather close to having your 109 completed...How soon do you think it'll be before she takes to the air ?

RE: CMP BF109F BUILDING THREAD
 

Good evening. Has anyone contemplated installing a gas engine (other than an evolution) into this model? Curious as to how much nose reconstruction would take place in order to accomodate a firewall mounted engine. I don't recall any previous mention of such an installation.

Nose construction was a major turn-off in my desicion not to purchase the CMP P-40 Warhawk. I have limited time, however, I would greatly appreciate advise from modelers experienced in such a retro-fit.

Thanks

RE: CMP BF109F BUILDING THREAD
 

http://www.lado-tech.net/proddetail.php?prod=60-5 the manufacturer tells me this one will probably fit

RE: CMP BF109F BUILDING THREAD
 

[quote]ORIGINAL: HW50

I recently received my CMP BF109F, and I look forward to start working on it. would like to install all servos, battery, receiver, retracts etc. and see how much weight is needed in the nose to balance it. Then decide on engine. I guess the factory recommendation on engine size is minimum.

Up till now my planes have had engines not greater than .90. Looking at the engine compartment I wonder if any reinforcements or extra glueing is needed. There is little glue on some of the joints, and the ply is not very thick in places.

Any views on this?

Thanks,
Helge.

Helge,
I used an O.S. 1.60FX and Slimline inverted Pitts muffler. With everything installed it balances at 112 mm from leading edge without adding any weight.
Dave
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