CMP BF109F BUILDING THREAD
10-18-2008 | 08:40 PM
#401
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From: , NEW ZEALAND
RE: CMP BF109F BUILDING THREAD
thought that was what he meant... just checking, I am as I type (having a break) making two rod supports for inside the fuselage using cardboard as a template first without them the rods will be bouncing around inside the plane during flight! not the best situation actually I would love to see an internal cam taking vid of the inside to see what it really does! some speeds I bet the rods will resonate like a guitar string! in other words not the best in a cross wind landing?
10-18-2008 | 08:49 PM
#403
RE: CMP BF109F BUILDING THREAD
ORIGINAL: snappa
did Kahlog use the serria retracts with the 85 deg position?
did Kahlog use the serria retracts with the 85 deg position?
10-18-2008 | 08:55 PM
#404
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From: , NEW ZEALAND
RE: CMP BF109F BUILDING THREAD
sorry i meant Ramstein44 is this site playing up? yes I have the same retracts and they are 80 deg did Ramstein44 get the angled retracts?
10-18-2008 | 09:30 PM
#405
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RE: CMP BF109F BUILDING THREAD
ORIGINAL: kahloq
If its a new 220, the vibrations will settle down once the motor is broke in well. Also, not sure exactly how you mounted it, but using vibration dampening mounts sometimes actually amplifies the problem.
Now, you said it slowed to a crawl with the landing flaps only yes? I wonder how fast you could slow the plane down once the mains touch if you flipped the air brakes on. Since these kinda act like a "crow" setup, it should create a lot of drag. of course, you'd want to test this in the air up high to see what the plane does first. You may end up having to mix in an elevator to airbrake setting if it balloons are loses altitude(more likely it will climb a little if you have the top airbrake set to stock configuration where it doesnt deflect up as much as the lower portion goes down).
Where did you set the CG? Did you think it flew really well at the point, or do you think a different location would be better and why?
If its a new 220, the vibrations will settle down once the motor is broke in well. Also, not sure exactly how you mounted it, but using vibration dampening mounts sometimes actually amplifies the problem.
Now, you said it slowed to a crawl with the landing flaps only yes? I wonder how fast you could slow the plane down once the mains touch if you flipped the air brakes on. Since these kinda act like a "crow" setup, it should create a lot of drag. of course, you'd want to test this in the air up high to see what the plane does first. You may end up having to mix in an elevator to airbrake setting if it balloons are loses altitude(more likely it will climb a little if you have the top airbrake set to stock configuration where it doesnt deflect up as much as the lower portion goes down).
Where did you set the CG? Did you think it flew really well at the point, or do you think a different location would be better and why?
10-18-2008 | 09:34 PM
#407
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RE: CMP BF109F BUILDING THREAD
ORIGINAL: kahloq
The landing gear on ME-109's are pretty close to the center of the fuse when down. This makes the plane relatively unstable on the ground. its a trait of the real plane and is why many of the real ones were damaged or lost during the war due to landing accidents.
The gear locations on the CMP is actually spread farther out from the fuse then is scale to the real plane, so even with this slightly wider wheel stance, Ramstein is saying the plane behaves like the real thing.
My KMP Me-109 is like this and its gear is closer together. They take off usually ok, but landing, well, you gotta let the speed bleed off on the ground before you stear with rudder to turn it around or head to the pits cuz it will scrape a wing tip due to the centrifigal force caused by really close together langing gear.
Think of a mustang.....when the gear is down....the wheels are quite far apart....at least twice the distance as the wheels are on an ME-109.........and this is why the mustang lands and taxi's so easy.
ORIGINAL: snappa
what do you mean gear so close?
what do you mean gear so close?
The gear locations on the CMP is actually spread farther out from the fuse then is scale to the real plane, so even with this slightly wider wheel stance, Ramstein is saying the plane behaves like the real thing.
My KMP Me-109 is like this and its gear is closer together. They take off usually ok, but landing, well, you gotta let the speed bleed off on the ground before you stear with rudder to turn it around or head to the pits cuz it will scrape a wing tip due to the centrifigal force caused by really close together langing gear.
Think of a mustang.....when the gear is down....the wheels are quite far apart....at least twice the distance as the wheels are on an ME-109.........and this is why the mustang lands and taxi's so easy.
10-18-2008 | 09:35 PM
#408
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RE: CMP BF109F BUILDING THREAD
ORIGINAL: snappa
sorry i meant Ramstein44 is this site playing up? yes I have the same retracts and they are 80 deg did Ramstein44 get the angled retracts?
sorry i meant Ramstein44 is this site playing up? yes I have the same retracts and they are 80 deg did Ramstein44 get the angled retracts?
10-18-2008 | 10:31 PM
#409
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RE: CMP BF109F BUILDING THREAD
Ram44
Congrats on your 1st flight and safe landing. 109s are a bit more challenging than your average model to take off and land. One reason why not to many at the field..
Again, congratulations on your flight and thanks for the valuble info.
Steve
Congrats on your 1st flight and safe landing. 109s are a bit more challenging than your average model to take off and land. One reason why not to many at the field..
Again, congratulations on your flight and thanks for the valuble info.
Steve
10-18-2008 | 10:48 PM
#410
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RE: CMP BF109F BUILDING THREAD
ORIGINAL: SCALECRAFT
Ram44
Congrats on your 1st flight and safe landing. 109s are a bit more challenging than your average model to take off and land. One reason why not to many at the field..
Again, congratulations on your flight and thanks for the valuble info.
Steve
Ram44
Congrats on your 1st flight and safe landing. 109s are a bit more challenging than your average model to take off and land. One reason why not to many at the field..
Again, congratulations on your flight and thanks for the valuble info.
Steve
I was against getting a 109 because of the landing gear but I'm happy with it so far. 
10-18-2008 | 11:07 PM
#411
RE: CMP BF109F BUILDING THREAD
ORIGINAL: Ramstein44
ORIGINAL: SCALECRAFT
Ram44
Congrats on your 1st flight and safe landing. 109s are a bit more challenging than your average model to take off and land. One reason why not to many at the field..
Again, congratulations on your flight and thanks for the valuble info.
Steve
Ram44
Congrats on your 1st flight and safe landing. 109s are a bit more challenging than your average model to take off and land. One reason why not to many at the field..
Again, congratulations on your flight and thanks for the valuble info.
Steve
Thanks. I normally fly the Focke wulf 190 and I'm more adapt to their wider stance. I got tired of people confusing the two so I bought the ME and would you know it, today someone confused this with a Fw190.. It must be the cross.
I was against getting a 109 because of the landing gear but I'm happy with it so far.
10-19-2008 | 11:00 AM
#413
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RE: CMP BF109F BUILDING THREAD
ORIGINAL: snappa
Ramstein44 did you use the original rods and wires for the rudder and elevator?
Ramstein44 did you use the original rods and wires for the rudder and elevator?
10-19-2008 | 12:43 PM
#414
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From: Almelo, NETHERLANDS
RE: CMP BF109F BUILDING THREAD
ORIGINAL: Ramstein44
I did use them. The only thing I did different was reinforce the 256 rods with carbon inserts and used gorilla glue to connect them. Added G10 to support the rods on the two formers in the fuse to prevent flex. Now there’s absolutely no bowing.
ORIGINAL: snappa
Ramstein44 did you use the original rods and wires for the rudder and elevator?
Ramstein44 did you use the original rods and wires for the rudder and elevator?
Maybe a stupid question, but what is a G10 which you used to support the rods.
Thanks in advance,
Eric Schumacher, Netherlands
10-19-2008 | 05:30 PM
#415
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RE: CMP BF109F BUILDING THREAD
Its basicly plain circuit board sheets. You can get it here but it's sold many places. http://www.fliteskin.com/. I've found that if you go to an computer electronics store, they have the really hard stuff which is what I use the most.
10-20-2008 | 01:18 AM
#416
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From: , NEW ZEALAND
RE: CMP BF109F BUILDING THREAD
see photo one show a solution I am thinking of, photo two shows the balsa rod supports, rest are obvious.... now photo one should provide a straighter run for the rods, the bulkheads I really dont like either as the rods are "ribbed" and you feel the running through the holes...
10-20-2008 | 07:31 AM
#417
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RE: CMP BF109F BUILDING THREAD
Congrats on your first flight Ramstein. I won't be getting mine done before the weather goes bad here, so I'll be taking my time and be ready for next spring.
Here's my latest scale mods. I made some exhaust blast guards out of thin plastic (picked up at the hobby shop). Paint match was done with some stuff I had laying around. I will coat everything with Polyurethane once I am done detailing. They turned out pretty nice even though the exhaust sticks out more than it should to be scale.
I also started on my gear doors. I found that the plastic pieces provided in the kit for strut covers fit over my Sierra gear and make for a nice way to mount the plastic doors. I plan to add a rubber band to the lower part of the door so it will hold it into the wing when the gear is retracted.
Here's my latest scale mods. I made some exhaust blast guards out of thin plastic (picked up at the hobby shop). Paint match was done with some stuff I had laying around. I will coat everything with Polyurethane once I am done detailing. They turned out pretty nice even though the exhaust sticks out more than it should to be scale.
I also started on my gear doors. I found that the plastic pieces provided in the kit for strut covers fit over my Sierra gear and make for a nice way to mount the plastic doors. I plan to add a rubber band to the lower part of the door so it will hold it into the wing when the gear is retracted.
10-20-2008 | 10:20 AM
#418
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From: Easton, PA
RE: CMP BF109F BUILDING THREAD
Ramstein44, congratulations on the first flight !
One question, if you had used the air brake once you got her back on the ground and rolling do you think you would have got the tail down quicker ?
One question, if you had used the air brake once you got her back on the ground and rolling do you think you would have got the tail down quicker ?
10-20-2008 | 10:49 AM
#419
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RE: CMP BF109F BUILDING THREAD
ORIGINAL: Hot Rod Todd
Congrats on your first flight Ramstein. I won't be getting mine done before the weather goes bad here, so I'll be taking my time and be ready for next spring.
Here's my latest scale mods. I made some exhaust blast guards out of thin plastic (picked up at the hobby shop). Paint match was done with some stuff I had laying around. I will coat everything with Polyurethane once I am done detailing. They turned out pretty nice even though the exhaust sticks out more than it should to be scale.
I also started on my gear doors. I found that the plastic pieces provided in the kit for strut covers fit over my Sierra gear and make for a nice way to mount the plastic doors. I plan to add a rubber band to the lower part of the door so it will hold it into the wing when the gear is retracted.
Congrats on your first flight Ramstein. I won't be getting mine done before the weather goes bad here, so I'll be taking my time and be ready for next spring.
Here's my latest scale mods. I made some exhaust blast guards out of thin plastic (picked up at the hobby shop). Paint match was done with some stuff I had laying around. I will coat everything with Polyurethane once I am done detailing. They turned out pretty nice even though the exhaust sticks out more than it should to be scale.
I also started on my gear doors. I found that the plastic pieces provided in the kit for strut covers fit over my Sierra gear and make for a nice way to mount the plastic doors. I plan to add a rubber band to the lower part of the door so it will hold it into the wing when the gear is retracted.
10-20-2008 | 11:03 AM
#420
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RE: CMP BF109F BUILDING THREAD
ORIGINAL: rchorn
Ramstein44, congratulations on the first flight ! One question, if you had used the air brake once you got her back on the ground and rolling do you think you would have got the tail down quicker ?
Ramstein44, congratulations on the first flight !
One question, if you had used the air brake once you got her back on the ground and rolling do you think you would have got the tail down quicker ?
10-20-2008 | 11:22 AM
#421
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From: Easton, PA
RE: CMP BF109F BUILDING THREAD
Snappa, I see you purchased the Sierra retracts from Darrel, could you take a picture of the the gear down from the side view . I'd like to see where the wheel will be in relation to the leading edge . What degree are your retracts 80 , 85 ?
thanks Dick
thanks Dick
10-20-2008 | 11:27 AM
#422
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From: Easton, PA
RE: CMP BF109F BUILDING THREAD
Ramstein44, are you going to keep her that way, I mean with the air brakes not used . I know it's a pain to go back and change things, at least for me it is , once and done . Glad to hear that it's all in one piece anyway , maiden flights are wobbly knee days !
10-20-2008 | 12:20 PM
#423
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RE: CMP BF109F BUILDING THREAD
ORIGINAL: rchorn
Ramstein44, are you going to keep her that way, I mean with the air brakes not used . I know it's a pain to go back and change things, at least for me it is , once and done . Glad to hear that it's all in one piece anyway , maiden flights are wobbly knee days !
Ramstein44, are you going to keep her that way, I mean with the air brakes not used . I know it's a pain to go back and change things, at least for me it is , once and done . Glad to hear that it's all in one piece anyway , maiden flights are wobbly knee days !
10-20-2008 | 12:42 PM
#424
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RE: CMP BF109F BUILDING THREAD
This should be one fast plane with any of the recommended engines. I have no doubt that my OS 1.60 with a 17X10 prop will pull this thing to about 120mph. I'll be making the control surfaces as tight as I can, don't want a bit of flutter to take it out!
I think I'll set the airbrakes up, but I will not have the top flap move up much (use the short of the horn for the top flap). I find I like the drag split flaps give me, so the air brakes should make it pretty close to a plane with large split flaps in how it lands. If I do end up running the 17X10 I will need some drag or the thing will never slow down! Split flaps also don't seem to have as much ground effect as regular flaps, something that can get a bit tricky if your flaps have a lot of throw causing the tail to want to stay up after touch down.
I think I'll set the airbrakes up, but I will not have the top flap move up much (use the short of the horn for the top flap). I find I like the drag split flaps give me, so the air brakes should make it pretty close to a plane with large split flaps in how it lands. If I do end up running the 17X10 I will need some drag or the thing will never slow down! Split flaps also don't seem to have as much ground effect as regular flaps, something that can get a bit tricky if your flaps have a lot of throw causing the tail to want to stay up after touch down.
10-20-2008 | 01:27 PM
#425
My Feedback: (157)
RE: CMP BF109F BUILDING THREAD
I guess I'll have to add that the landing flaps are NOT beyond the recomended range for flight and landing but are capable of going beyond the recomended range for slowing the plane which didnt work well enough after touch down in my opinion. Once again I hope someone else will fly this bird so we'll have more data on this bird and their experiences on her.
