This is just a suggestion ................ I would buy the engine that is easier for you to get parts and service , they are both great engines . Look at it so you have the advantage . Are you going to put a scale exhaust system ?
Michel
< Message edited by michel gravelle -- 6/14/2008 10:30:52 PM >
well about the parts, i think the 3W dealer has more spare parts than the DA shop, also the price of the 3W is almost half of the DA's price. so if they both have the same performance, i'll go with the 3W for sure, about the Keleo's exhaust, i'm still not sure, i know it look's good but i don't want to modify the firewall. or is it a direct fit without modifications?? also, i've just placed my order from towerhobbies, i ordered the robarts and all the small neccessary stuff to complete the plain, unfortunately, the main gears are out of stock and they should have them in few days, other than that, i'll get the servos/reciever/batteries from here in Kuwait, servos will be JR digitals around 11Kg, a 9CH reciever but still not sure about the batteries, what do you suggest??
I am useing a Da50 with the Keleo exhaust system . To mount this engine at the proper distance I need to use the 3 inch stand-offs , plus , I have had machined other stand-offs 7/8 inch long . To-gether they give me the proper distance that I need for the engine . As it goes for the Keleo exhaust system , very little has to be removed from the firewall on each side , its really very little work to fit in the exhaust . As for battery's , get youre self two packs of at least 2500Mah , one for the engine and one for the radio system . Some suggestions that I do have for you , is to get a remote ignition cut-ff switch , two high quality power switches ( JR ) , two matchboxs from JR .
Also if you look at page 51 on this thread you will see a modifications to the wings where the ribs hold the retract mounting plate . I believe that this is a critical part of this plane . just fiberglasing the retract mount area is not worth the time , it will only add weight and tear out in another place . You must stop the spars from twisting . I went a little more in depth than that , and I extended the doublers of the ribs that hold the mounting plates , mine now go behind the spars and I added the plywood webs . See post # 1542
Another note , put the wings to-gether before you install the retracts . This way you can use a string to line up the struts and they will be identical in both wings . It helps a lot when youre going down the runway , It tracks much , much easier . Place the wing upside down on a table , Push the retracts outwards towards the wing tips . Install the inside front ( leading edge ) screw . Than take a string in youre hands and hold it over the retracts . You will see if the struts are parralel to each other . I have never heard of anyone doing this , but I did it to a friend of mine ( and my own ) and you wouldn t believe how well it tracts down the runway
These are only thoughts that I am sharing
Michel
< Message edited by michel gravelle -- 6/15/2008 1:47:11 AM >
Posts: 175
Joined: 4/13/2004 From: Redlands,
CA, USA Status: offline
Michel, I was reading your last post about the 3" standoffs which will be used to set out the DA to the proper distance for the prop motor to firewall etc. but didnt understand what the 7/8" standoffs be used for? Another question is, as i would like to also use this same setup with the DA 50 and the Keleo scale exhaust, is the only protrusion from the cowling the head and spark plug boot? I read somewhere about an aftermarket cowl which is two piece that supposedly has the more accurate to scale lines of the 51s cowl area, it seemed as though it might accomodate more room for motor as well, and wonder if it would actually enclose the motor entirely. Thanks. Louis
< Message edited by Tisoy909 -- 6/15/2008 5:49:12 AM >
On page 27 of the instruction manual it says to mount the engine 7-1/2 to 7-3/4 from the firewall . With the standoffs that I have had made . they will be an addition to the 3 inch standoffs , which will give me 7-3/4 inches from the fire wall As for the cowling , a two piece cowl would be great . Yes........ there is a two piece cowl sold by another company , but I do not know who that is , I believe that I read it in this thread , and I do not know where . As for the DA 50 hanging out of the cowl , YES...... the lower part of the cowl , has the head of the engine sticking out , and that is OK with me , I accept that . It is better than many other engines , where you have to really chop up the sides of the cowl to fit the engine As I am building this bird ...... more of a sport scale , I do not mind the head sticking out from the bottom of the cowl . It will NOT have an overheating problem as some engines do
Michel
< Message edited by michel gravelle -- 6/15/2008 10:28:56 AM >
thanks alot for all the great info and tips your providing me with
i have a question about modifing the retract place, i have a WM p-51 powered with a 120OS 4stroke, all the guys told me to reinforce the retract area and all of them guaranteed that i will break them if i dont modify it, I DIDNT MODIFY THE AREA and i flew my mustang for 5 monthes, at least 10 tanks a week with no problems, our runway is asphalt and i have a good level of flying and specially landing, never had a rough landing even when it's windy or when i have a did stick. so do you think that i HAVE TO MODIFY IT ON MY 1/5 MUSTANG??
about the batteries, i was thinkin about going Lipo battery, what do you think? lipos are lighter and last longer...
also about the servos, the manual says minimum 50oz/in, i think its too weak for a plane this big with a 50 size gas engine, what will be a good range of torque??
thanks alot
Ali
< Message edited by Q8Nitro -- 6/15/2008 9:53:05 PM >
Posts: 429
Joined: 2/15/2002 From: Monrovia,
MD, USA Status: offline
quote:
ORIGINAL: Q8Nitro
about the batteries, i was thinkin about going Lipo battery, what do you think? lipos are lighter and last longer...
also about the servos, the manual says minimum 50oz/in, i think its too weak for a plane this big with a 50 size gas engine, what will be a good range of torque??
thanks alot
Ali
I am using Fut 3010 servos all around and they seem to be doing fine, plenty of power for 120mph straffing runs! As far as batts, I am using A123 cells. 2 cells are 6.6 to 7 volts and 2300mah. The pack is mounted on the rear wing mount as per instructions. I use a 4 cell nihm pack for my ignition on my DA50. With this setup, I am good for 60 minutes of flying time before a recharge. I love the way this bird flys and lands with full flaps - smooth and easy. Good luck with yours.
First .............. modifying the retract area is a decision only one self can make . I am not such a good flyer , I know that I will have those less than perfect landings . I did the modifications on my wing because they ( the grain on the webs are the wrong way , period ) will break off . and I would rather do it while it is in one piece , than when it will be in a damaged state .
Thanks Cobra 1 for answering the battery question . many of our flyers here are going for these A123 lipo battery's
As for servos ............ I am useing Hitec HS-5625MG , they give 110oz at 4.8 volt . I am useing them all around except for the retract valve and the throudle . They are very reasonable in price and the company stands behind there product . And they are programmable .
Hi I wish to clarify something here . I modified my retract mount support , NOT THE RETRACT MOUNTS THEM SELFS . I want my retract mounts to tear out with a more than hard landing . I did not modify nor add extra strength to the mounts . Gary Makers modification is excellent , I did add to his modification though . I extended the rib doublers to go behind the spars , this is the way the kit is built , and I agree with it The last picture , which was taken from this thread , shows that the retract area was built strong , but around it was not , I want the opposite of this picture . Look how the retract area is in one piece
Michel
< Message edited by michel gravelle -- 6/16/2008 3:42:07 PM >
I have recieved my 7/8 inch stand-offs to-day . I immediatly went to work to install them . For me this is very pleaseing to the eyes . The spinner backplate is exactly 7-3/4 inch from the fire wall . I keep the engine as far forward as possible because the engine is so light . It looks neat and clean , and I like that . Ali ............. I have included a couple of pictures of the exhaust system and how the firewall is cut to install it , it took an hour to complete
Michel
< Message edited by michel gravelle -- 6/17/2008 12:41:26 AM >
Did some more work on the assembly , the guid tubes for the wing bolts are finished and I added the fairing to te bottom frint wing ( which sucks ) and I have done some work on the front pannel of the cock-pit .
Printable Version
All Forums >> RC Airplanes >> RC Warbirds and Warplanes >> RE: TF 1/5 Scale P-51 ARF Assembly (1ST MISHAP!!!) 
RE: TF 1/5 Scale P-51 ARF Assembly (1ST MISHAP!!!) - 
As far as batts, I am using A123 cells. 2 cells are 6.6 to 7 volts and 2300mah. The pack is mounted on the rear wing mount as per instructions. I use a 4 cell nihm pack for my ignition on my DA50. With this setup, I am good for 60 minutes of flying time before a recharge. I love the way this bird flys and lands with full flaps - smooth and easy. Good luck with yours.
