mike-rc

My Feedback: (142)

Hello Al,
I am going to use teh BCMA 26 engine I was going to use in the FW. I think it will work out better than vice versa. I will need to get a 2 blade spinner. I checked the Amp draw with the 15.75 x 13 3 blade and only got about 55A and less than 1800W. With a 19 x 12 2 blade I got 67A and about 2200W. I will call Paul tomorrow.
Have you followed any threads for the Monocoupe?
Thanks, Mike

NoFlaps

My Feedback: (131)

So, I have to ask...and hope I get a response from at least 3 of you. [8D]
How much do your planes weigh, and have you figured out what that wing loading comes to ?
Is the airfoil particulary fatm as a means to alleviate the high wing-loading ?

Randyt26

My Feedback: (9)

the Video of the electric conversion looks to fly reallly well so i dont think its overweight by any means. I am impressed with this arf you pay more but I believe its worth it.
Randy

dvs1

Seeing more progress from you guys helped get me more motivated this weekend. I ended up doing a little more
on the drop tank and pylon. It's getting there, just have to finish with the standoffs and tank mounts. Then add a few rivots
and panel lines to the pylon.

mobyal

NoFlaps --
I don't know what mine'll weigh. I'll be interested to hear what others have to say.
Was your question prompted by the article on the KMP Typhoon in the latest MAN? Just got my copy today and read the article over lunch. (Left it in my shop so I'm working from memory here.) The reviewer -- one of the Ronges -- initially had to add seven and a half pounds of lead to get it to balance! After he went back and put the largest/heaviest engine in it he could fit, he still had to add a lot of lead -- was it 4+ pounds? -- to balance it. The whole thing came out at 19+ pounds if i remember correctly. He does say it flies all right and does mention the Typhoon's airfoil as a help. But states clearly that it's not for a beginner. Either assembling or flying. Takes a swipe or two at the instructions, too.
The Taffy doesn't have much of a nose moment, but then the FW "A"s don't either.
Still hope to begin on mine next week. Engine shipped from Tower, so once I find an aluminum mount for it, I'll have everything.
Al

LDM

My Feedback: (15)

Moby ,you read my mind , I just got that same issues of Man and was thinking wow 73" span , 19.2 pound model and they claim that its flys good ???and you wonder why some warbirds have a bad reputation . I look at it like this , when they build the real plane , was it designed to carry 25% or more in dead weight for simple CG balance ??? no way in He....ll .
To me that is not a fun inticeing warbird to buy , build and fly .
I would pull that entire thing apart and move every possible servos forward --as far forward as possible , move the EI battery to the firewall and more the radio battery under the fule tank and add the largest battery possible , go to light weight wheels .
The FW190 , the seafury , the hellcats ect all have the same tendency to be tail heavy , so every possible move forward must be made in the assembly/ build process .

nicostoffi

Hello,

now I've finished my FW 190.
Building time ca. 14 days, only the engine doesn't mounted.
Weight over all, with servos, accu, Glowaccu, without engine - 5,1 kg = 11,22 p.

alanc

the full size tiffy was indeed designed to carry dead weight---in the form of the napier sabre, 1 ton of deadweight, we had a choice, which was discussed in open forum in the UK, go for scale, and ballast, or stretch the front end, not one vote for the latter, it does indeed fly well, just go try it, it was always going to be the one that had lots of ballast, friend of mine once owned a DAennis Bryant one, about 63", i think, it weighed nothing---until you tried to balance it for flight, it needed 3lb up front, it flew superbly, as this one will, BUT, learnt to use flaps, the model is designed to use them on landing, we chose the tiff, for its superb thick wing, and huge flaps, its a winner, go fly it the FW and bearcat also need ballast, not as much though, these too are flying quite happily, they are well designed aerodynamically, trust us

LDM

My Feedback: (15)

Alan your misunderstanding me , my critisum is that of the builder , everyone knows that every short nose warbird will be tail heavy .He even makes the comment that the "wheels seem heavy " and not having the model for my own I would imagine that the wheels are near/on are slighty ahead of the CG considering they retract towards the rear , so useing lighter wheels (that can be made to look scale ) is one simple option to shed weight . IN addition his choice of power could have been advoided if he simply checked the tower website , you can get 3lbs 3 oz of engine turning a standard 18/10 prop out of the FugiBT 32 EI , if i am not mistaken he was one engine smaller .
Also if the CG was show at /on or near the wing servos , then do the work and move the servos forward .

Redback

After much deliberation finally got mine balanced at the recommended 130mm back position (wheels up). This took 800gms of lead (about 1.5lbs) plus a large battery mounted in the cowl on a very substantial steel bracket (which also carries the ballast.

Yet to check the final weight but based on a previous check expect it to be about 8Kgm. Considered moving the servos foward when assembling but given that these are close to the CG anyway didn't think it would make much difference.

The supplied retracts were very sluggish in operation until I replaced the suppied coupler with a Robart one. The one with the kit has an O ring in it which seems to constrict the airflow when the connector is tightened. Once I changed it out the retracts are now very positive.

Just need the rain to stop now!


Terry

alanc

also check if your retracts are brass bushed, or nylon, brass bushes are available from KMP These bushes are on the pivot pins that run in the slider slots

mike-rc

My Feedback: (142)

My plane weighs just over 17lbs with the 2 5S 4900mah batteries in it. It balances at 150mm back from where the wing meets the fuse. If you extend the leading edges of the wings to the centerline, that point is about 20mm back from the front of the wing where it meets the fuse. I believe this is where the the CG should be as it is on the main spar. I would like to here from someone who flew it as to where their CG is. Flying this plane tail heavy on the first flight would not be enjoyable!
Mike

Redback

Mike,

Interested in your view of where the CG should be as I was thinking along the same lines, although at the moment I have gone with 130mm back from the wing/fuse join. Moving it back 20mm would lose me best part of 1lb, which would make mine about the same weight as yours.

Would sure be good to hear from someone who has flown one, I share your concerns on a tail heavy 1st flight.

Terry

Sarah

The instructions don't mention any side thrust, or down thrust. How much side thrust are you guys using?

Many thanks

Redback

Sarah,

I posted on this some time ago but no one responded.

As you say there is nothing in the instructions, also there is no oppportunity to align the cowl to allow any to be added without having the prop at an odd angle.

As of now I have my engine with zero side/down thrust. Not too concerned about the downthrust but some reassurance on the side thrust would be good!

Just about ready to fly once the rain stops and the strip dries out a bit.


Terry

NoFlaps

My Feedback: (131)

Mobyal,

Actually, I had the KMP tiffy with a 26cc gas engine in it, but sold it after a handful of flights...it was georgeous, and looked soo fine in the air, but mine too was over 19 lbs, and it kinda took the fun out of flying her.
I sold it back in the early summer months ago. I got word from the buyer that it went down..He was kind enough to mail back some of the custome nose art I did on it.
I had a build thread on the plane...I ended up taking all uneccessary stuff out of the plane 9especially in the rear to help with the wing loading.
It did have a fat airfoil, which helped tremendously, but just like the write up in Model Airplane magazine, it was a plane for the experienced, and although I feel I meet those criteria, , it's nice to not have to be worrying about it the whole time.
I really like the FW190 and wondered if she was heavy too. [8D]

dvs1

Pylon and fuel tank are mounted. Still have a little work to do on the pylon. I made the pylon to be mid air dropable if I desire,
it is also removable. So for the first few flights I will leave it off. Retracts have plenty of clearance so that is not an issue. Also its
CG is really close to the planes CG so I will not have to rebalance the plane for flight with the pylon and tank installed or not.

My FW-190 is pretty close to completion, I just have to install my tail retract, and my pushrods for my elevators, as well as a scale cockpit.
I still would like to put Sierra main gear and wheels on it when I get some extra cash.

As the plane sits right now it is at 13.5 lbs. Depending on the outcome with the tailgear and any other scale accessories I put on it. I place the
total ready to fly balanced weight at 16 lbs give or take 8 oz. I placed it on my balancer tonight and that number is with the fuel tank and pylon
installed.

NoFlaps

My Feedback: (131)

That sure is a great looking plane...I can't wait for someone to put it on video. [8D]

nicostoffi

Hello everybody,
after 14 days work my FW 190 are ready to fly.
Powered by a Saito 170 radial and weight 6,3 kg = 13,86 lbs.

About C.G., you say in the instructions they said 130 mm.

Without more weight at this moment the C.G. is near 130 mm.

Randyt26

My Feedback: (9)

Nice looking pilot and love the cap . Hope to get mine started this weekend.
Randy

PE2fan

My Feedback: (8)

Thank you Nico,
I have that same engine and was hoping it would work. Now lets get her in the air and let me know how it flies with that 170.

Good luck.
Mike

nicostoffi

OW,

I put some weight in the front for the right C.G.

[&o][&o][&o]

Finalweight 17,6 lbs are the result.
I don't know if the Saito has power enough for this.

LDM

My Feedback: (15)

Would someone be kind enought to tell me how far the retract mounting rails are from the leading edge of the wing and do the retracts on the model/real plane retract in a straight line to the center wing rib or on an angle forward ?
Thanks for your consideration
Lou

Redback

Nico,

Mine weighs 17.4 lbs balanced. Have an OS 120AX in mine.

Haven't fitted the drop tank yet but am considering putting it on and filling with Helium to reduce the weight a bit. Have already done this with the retract tank

First flight will happen as soon as it dries out enough to mow the runway. Plan to do some fast taxis down the strip first to see how it tracks and get a feel for whether it want to fly!

BTW. what is the German word for brick?

Terry

nicostoffi

Ziegelstein or only Stein.

Schwer wie ein Ziegelstein.

The same as mine.