Yippee! I got a Lanyu F5b Hotliner

[PeterB]

Thanks Chris,

It's a good start when the web is vertical. Time will tell how strong it is.

Pete

[C-MIC]

Chris,
The wing is built OK and strong enough for proper F5B 10 CELLs runs.Full16 cells would be OK too but I hate stuff things too tight.
-you may reinforce the servo bay by laying a carbon cloth patch with epoxy resin.
-or you could make a rib (half) with 3-5mm thick balsa, (shape app. by trial /error). I just use carbon cloth method and works ok,so far so good.

I may post some pic when I go home later today. the PC here is crap, cannot type prope,rly. see the edit oof my earlier post.

david

[Chris F]

Hi David,

Thanks for the information. I have put a tiny blob of thin CA in the hole but it is so small I'll leave it at that.

I was wondering what happened to your last post as it just stopped, so thanks for giving me the CoG and recommended servos. I don't intend on abusing this model too much and at the most it will have 4s2p in it so that should be a fair bit lighter than 16 sub-c size cells. I just want it for fast but graceful aerobatics, no square loops at top speed or eggbeaters for me. I want this model to last a long time because when it dies it will be a while before I'll be getting another.

I think the power system will be running well under spec (except maybe the motor), but I will check the temperature and open up some cooling holes if I need to.

Looking at the links posted by shhhhh, my scratch building experience with balsa isn't going to help me with repairs to this model, but if the time comes, I'll be giving it a go .

I'm a bit strapped for cash (as usual ) so it may take a while for me to get the servos and esc, but I will post any progress I make.

Chris.

[Chris F]

I have been made an offer on Waypoint W-092MB servos for my Lanyu hotliner which is only marginly cheaper than the HS56HB servos C-MIC recommended. The Waypoint have better specs but I was wondering if anyone here knows if they are as reliable? A few dollars isn't going to sway me either way, I just want the most reliable servo that will do the job.

Thanks

Chris.

[Chris F]

It may seem a silly question, but I would really appreciate some advice before doing anything dumb.

I have bought three HS56HB servos to install in the Lanyu. I have a slight problem with the aileron servos. They are slightly too thick to fit inside the wing without hacking away at the wing. David (C-MIC), did you have this problem when installing these servos, or was the wing on your model a bit thicker?

I might be able to get away with dremeling a bit of the inner lip of the servo bay to allow the servo to meet the spar (see attached picture), but I wanted to ask here before doing anything stupid. Should I buy thinner servos? I can't return these ones now as I've cut off the lugs.

[Mike Seale]

These servos are not the thinnest, but I can understand why you chose them and buying thinner servos is an expensive way to solve the slight issue you have.
Cutting the lip as you show in your diagram is the simplest option and might not show at all depending on what you have to cover the hole.
Another option is to carefully use your dremel and remove part of the servo case. I have done this often and it is not as scary as it sounds. If you decide to do this, make sure you remove the servo screws first because the dremel will cut through the plastic case easily but not the hardened steel screws. You could even remove the whole bottom of the servo if you want as long as you glue it in in such a way that the servo motor and pot stay firmly in place. Then you'd only have to cut a small part of the gear housing.

[Chris F]

Hi Mike,

Once I am able to slide the servo up to the spar I should only have about 1 mm of servo case to get rid of, so a bit of careful work with the Dremel should do the trick. I'll open up the servo and try to see how much I can take off without doing too much damage. The model comes with some thin moulded fibreglass servo covers so with your advice I think I'll get away with it. It's nice to get a second opinion from someone who knows, so thanks Mike.

[flightmare]

I wouldnt let the the cost of 2 mediocre hs56 servo's get you down,so what if you cant take them back,save them for the next plane,or put them up on rc groups and eat a little bit of it..Dymond 60 servo's are way small with plenty of torque.Thats just my take on it.Small things like that bug me to no end,and that to me is the best fix..

[Mike Seale]

Originally Posted by flightmare

I wouldnt let the the cost of 2 mediocre hs56 servo's get you down,so what if you cant take them back,save them for the next plane,or put them up on rc groups and eat a little bit of it..Dymond 60 servo's are way small with plenty of torque.Thats just my take on it.Small things like that bug me to no end,and that to me is the best fix..

Personally, I would not use D60's in a sport model like this. I use them in my competition models because there really is no other option. But the plastic gears and very weak output arm on the D60's would worry me over time in a sport model. And I would not describe the HS56 as a mediocre servo. My experience is that it is a robust and accurate servo.

[Synth]

And I would not describe the HS56 as a mediocre servo. My experience is that it is a robust and accurate servo.[/quote]

Agreed.

[Chris F]

Originally Posted by flightmare

I wouldnt let the the cost of 2 mediocre hs56 servo's get you down,so what if you cant take them back,save them for the next plane,or put them up on rc groups and eat a little bit of it..Dymond 60 servo's are way small with plenty of torque.Thats just my take on it.Small things like that bug me to no end,and that to me is the best fix..

Hi flightmare,

I did think of the D 60 servos as a lot of good thing have been said about them here, but they are not easy to get where I live. I was offered a deal on Waypoint W-092MB servos which are .5 of a mm thinner, but I couldn't find much information on them and I want durable servos.

If the HS 56HB servos were impossible to get in my model I would happily keep them for another model, but I'm financing this project through the sale of some of my very old IC stuff. If I really need to get new servos I'll be waiting a while for them. I'm sure I will get these servos in nice and neatly and hopefully they will stay there for a long time.

[C-MIC]

Originally Posted by Chris F

It may seem a silly question, but I would really appreciate some advice before doing anything dumb.

I have bought three HS56HB servos to install in the Lanyu. I have a slight problem with the aileron servos. They are slightly too thick to fit inside the wing without hacking away at the wing. David (C-MIC), did you have this problem when installing these servos, or was the wing on your model a bit thicker?

I might be able to get away with dremeling a bit of the inner lip of the servo bay to allow the servo to meet the spar (see attached picture), but I wanted to ask here before doing anything stupid. Should I buy thinner servos? I can't return these ones now as I've cut off the lugs.

Hi Chris,
Glad to see your beauty has come though with the creased tip which has happened to many of 1 Pc wing airframes, a ZOOM, a RW2 and a RW2 SPORT.

Sorry to reply late because I just get back 'home' yesterday night and slept like a dog....
Regarding the protruding servo issue, imho, it will not be that bad as you thought. I used HS56Hb all around in an EXCITE F5D, and same thing happens to the wing and the tail. I don't notice any bad effects so far. It may make the whirling (whisper) sound bigger I believe.

And in my no.1 CAT (AKA tiger,and speed freak) , I am using D-60 (also badged as PROTECH 109, 9G etc in difference countries) for Ailerons, and HS56hb for ele in the vertical fin in which part of servo horn is protruded. One feature I like those D60 is the 'stools' come along as accessories, so it lets me to change without pry them out leave scars on to the wings.
But anyway, I won't agree with the judgement of those 56hb as mediocre! those HS56hb are still my NO.1 favourite when it comes to sub micro servos. Good centerings, and really tough. I even use them in the Trilerons(outter most Ailerons) of my 3,5M Moebius. And I have them in the elevator of ALL OF MY HOTLINERS including RW2s, and will be using them in the coming RW-F5F, ie a 2,6m SPEEDY! So I would say one may be assured to use them in 2 M ship.
I don't know what the WAYPOINT servos are you refering to, but if it is same as those 'BMS' badged in blue transparent plastic cases, then you must be careful, and monitor it all the time. I and several buddies (glow guys) have VERY BAD experience on them!

Currently I am flying the no. 1 as with a Kontronik's old generation BL500-52+5,2:1 , 10 cells, and rfm7deg and Aeronaut 17x13 blades (3s3p Conions ), this combo turns it into a rocket and I could fly it all day long. I have recorded the longest flight of it with mentioned combo, .....38 mins, with 1/2 current capacity!

I may post some photo here later, because the CAT is in the car and I am too lazy to get it.
I want to built my second CAT as a TRUE 7cells ship, and I want a truly HOT motor into it, any suggestions?
Could any one tell me what is the difference (EXCEPT the gearbox ? or any more?) between the carbon cased B40-5L-F5F hackers'6,7:1 box and the 5L+4,4:1Maxon box?? The maxon has a 'wimpy' output shaft of 4mm ,that make me difficult to use with rfm spinners, or even many plain spinners.

David

[flightmare]

Originally Posted by flightmare

I wouldnt let the the cost of 2 mediocre hs56 servo's get you down,so what if you cant take them back,save them for the next plane,or put them up on rc groups and eat a little bit of it..Dymond 60 servo's are way small with plenty of torque.Thats just my take on it.Small things like that bug me to no end,and that to me is the best fix..

Must be allot of Hitec users out there.my apologees for the offending comment..
But you absolutely missed my point.The point I was trying to make is that when you put that much time and money into an airplane it is kinda your pride and joy..and want it to be perfect,It wasnt my intention to point out the mediocrity of the servo..I dont like to be retrofitting an expensive airframe that came from halfway around the world,and may or may not be available.

[Synth]

No offence taken I'm sure, but the mediocrity of this servo is non existent. It is one of the best mini servos available. Look at the heli guys who are hard on servos. They swear by the 56.

[Mike Seale]

Originally Posted by flightmare

But you absolutely missed my point.

I got it but did not understand why you would recommend a cheap 'park-flyer' servo. Like I said, I will use D60's when needs must, but they are nowhere near as good as the HS56. Now, if you'd recommended Volz Wingmaxx, that's a different matter.

And because the servos have to be glued in it really does not matter that you cut the case a bit...assume they are in there for good and you'll never need or want to use them in another model.

Originally Posted by C-MIC

One feature I like those D60 is the 'stools' come along as accessories, so it lets me to change without pry them out leave scars on to the wings.

I'm amazed you can fly your models like this. Even slight movement of the servo will equal slop and flutter at high speed. And flutter will very quickly cause the flimsy servo horn hole to stretch which adds even more flutter, and so on.