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Author Topic: i build my first biplane  (Read 1147 times)

Offline Michael Novobrantsev

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i build my first biplane
« on: February 05, 2020, 08:51:37 AM »
Hello !
 Now i  build my first biplane like biceps   wingspan 47"
  Chord   without flaps    is 8"
 Engine in side position.
Now i am in  choice betwenn engines :
MERCO 49  or  ~>  FOX 60 EAGLE I ?
 weight  of   both engines  is 350 -370 gramm
I know  Merco is  is good stunt engine  , but  his weight  like Fox 60
I don t know about  stunt experience of  Fox Eagle I  60 .
 Anybody have ideas ?
 Thanks


« Last Edit: February 05, 2020, 11:07:37 AM by Michael Novobrantsev »

Offline Air Ministry .

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Re: i build my first biplane
« Reply #1 on: February 05, 2020, 05:11:19 PM »
looks nice .

No experiance with the Fox Eagle , but a Merco 49 . With This intake . the Trumpet ish one . But the long lug case , single plug , & a 49 not a 61 . Tho Ive two 61s now , & no 49s .  :-\ :-X :P
Incidently , theres two C'Case Intake bore diameters . Bored one of the 61s to the 1/2 bore Of the Trumpet intake .

The 49 was initially a bit tight , but loosened of & on the Fox Fuel , 27 % oil , 15 & 20 % Nitro , with stock head clearance , ran superbly . Even when you put a muffler on it .  :-X o.k. I was out in the sticks .
The big heavy ugly Super Tigre Quite Muffler, it ran well . No power loss . tho snapped the puny 6 B.A. bolt aft , doing squares .  :P Stock Head Clearance . Australia . Might be ' Nitro ' Comp Ratio for Here ? .

Windsor Wood 12 x 6 , thinned . on the 72 Oz 72 Span Mew Gull . tho'd be more with 4 Oz. muffler !

SO , think a GOOD Merco ( This was as new ) would be dependable & trouble free .

Had the tourque to hold a steady speed , even when it was blowing . Something Id think youd need . As theres a bit of frontal area having several wings & suchlike .

NEEDS GOOD COOLING FLOW , a decent intake area and free flowing cowl discharge . Mine was 7.5 mm intake bore. Will dig out the timing figures . they Vary .
Was a round hole to passage in crank , whereas the 61s I have are rectulinear . One 61 has a 1/4 prop thread/ shaft . & its shorter nosed than the usual 5/16 thread shaft .

I suppose a Merco Muffler would even fit .  S?P Was much gruntier & steadier , rich , with the Nitro . So 10% might be the idea . Ran a steady ' top of ' the four stroke , puled uphill well .with the weight .
Good in the Squares , would stay ' fueled ' . Probly a 6 Oz / 150 c.c. fuel tank .

p.s. Hope youve got a good strong ' no slop ' control system . 1/8 wire ( 3.2 m.m. dia. )  horn wire etc . Plus the 4 inch bellcrank . for leverage . Even a 4 1/2 " bellcrank ! .

Online Dave Hull

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Re: i build my first biplane
« Reply #2 on: February 05, 2020, 09:38:49 PM »
Michael,

That looks like a fun project!  You might check this thread for some ideas on the Fox Eagle vs. the Merco:

https://stunthanger.com/smf/engine-set-up-tips/fox-eagle-engine/


The Divot

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #3 on: February 06, 2020, 06:49:41 AM »
Quote
You might check this thread for some ideas on the Fox Eagle vs. the Merco:

https://stunthanger.com/smf/engine-set-up-tips/fox-eagle-engine/
Thank  you guys .
 This is useful information

Offline Air Ministry .

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Re: i build my first biplane
« Reply #4 on: February 07, 2020, 07:21:00 PM »
Quote
I know  Merco is  is good stunt engine  , but  his weight  like Fox 60

Saves Noseweight, so the planes lighter .  :-X

Think mines 130 Ex 110 Trans . Superb run. Will check ' the book ' ( when I find it  :-[)

Keep the pictures flowing .  H^^

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #5 on: February 08, 2020, 01:41:41 PM »
Quote
Saves Noseweight, so the planes lighter .  :-X

Think mines 130 Ex 110 Trans . Superb run. Will check ' the book ' ( when I find it  :-[)

Keep the pictures flowing .  H^^
Hello Air Ministry !
 I do not undestand you fully, english is not my native language n~
You offer to me making nose more shortly  ?

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #6 on: February 08, 2020, 02:19:31 PM »
Quote
130 Ex 110 Trans
this  is  about timing of engine . LL~
 I measured compression ratio on merco 49 III dual plug  , it  sign compression ratio is 8 !!?
I think it is so few ? But engine run so good 13/6 prop


Offline Avaiojet

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Re: i build my first biplane
« Reply #7 on: February 08, 2020, 02:38:01 PM »
Michael,

Welcome to the forum.

Your own design?

CB
Trump Derangement Syndrome. TDS. 
Avaiojet Derangement Syndrome. ADS
 Please visit my updated Website! www.cfcgraphics.com  If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot.  Owner of CFC Graphics. "Model Airplane Graphics from a Model Airplane Builder."  "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten.  I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.  "Ya gotta love it when a plane comes together."  Proverb 11.9  "With his mouth the Godless destroys his neighbor..."  "Perhaps the greatest challenge in modeling is to build a competitive control line stunter that looks like a real airplane." David McCellan, 1980.

Offline Air Ministry .

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Re: i build my first biplane
« Reply #8 on: February 08, 2020, 07:17:31 PM »
Sorry,
one of our silly English Jokes ! .

Heavy Engine = needs no nose weight = lighter aeroplane ! . ( obviously 1 + 1 = 11 theory )

The 130 - 110 is the timing -> piston opens closes exhaust & transfer ports .



Differant gasket under sleeve . the thickness . Varies Timing .



A pointer from lug , find top & bottom of stroke . Measure across from piston right down , ea side of b.d.c. , say 65 + 65 = 130 .
the MERCO cylinder is OFFSET ( Desaxe ) to crankshaft , so figue each side not identical .

Very Easy to ' drop ' the timing on a Merco . Lower Sleeve = thinner gasket .
BUT IF ITS GOOD , DONT STUFF WITH IT . Just keep it oiled .
==================================================
 :P

Yes. Very intresting aeroplane . Nice look .

To see drawings would be good .

http://sceptreflight.com/Model%20Engine%20Tests/Merco%2049%20&%2061%20Mk1.html

see last / bottom . " back to index "  also .

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #9 on: February 09, 2020, 04:01:20 AM »
Quote
Sorry,
one of our silly English Jokes ! .
Heavy Engine = needs no nose weight = lighter aeroplane ! . ( obviously 1 + 1 = 11 theory )The 130 - 110 is the timing -> piston opens closes exhaust & transfer ports .
Differant gasket under sleeve . the thickness . Varies Timing .
A pointer from lug , find top & bottom of stroke . Measure across from piston right down , ea side of b.d.c. , say 65 + 65 = 130 .
the MERCO cylinder is OFFSET ( Desaxe ) to crankshaft , so figue each side not identical .
Very Easy to ' drop ' the timing on a Merco . Lower Sleeve = thinner gasket .
BUT IF ITS GOOD , DONT STUFF WITH IT . Just keep it oiled .
Thank yuo for  you anglemeter
I will use in  in my other engines too.


Quote
Your own design?
this is "BICEPS" , it have simply forms for easy productions .

https://www.airplanesandrockets.com/airplanes/biceps-article-plans-apr-1969-AAM.htm

 I made change on some moments : I want  cylinder in side position and  disassembled construction for transportation .

 




Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #10 on: February 21, 2020, 04:13:49 AM »
 I keep making my Bipe .
 Now it weight 950 gr 33.5 oz  ( summary wing area 810 sq.in)
 weight will be more  from:
-engine+prop+spinner+tank
-wheels axle=wheels
- farbe +cording film
- upper flaps
- lateral struts between wings





 wings sceletons are still not grinding ,

Leftovers of foam glue not yet cleaned .
I use PU foam glue because  i work and obtain balsa and foam parts not very accurate yet :-(
and foam glue fills the gaps.
This connection obtained strong and elastic.



Online Dave Hull

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Re: i build my first biplane
« Reply #11 on: February 21, 2020, 09:43:35 PM »
Michael,

Looks like you are making good progress! Thank you for sharing your project with us.

You might find it fun to compare your biplane design to one from the 1955 Flying Models magazine. This design was named after the hunting dog, because it was supposed to "be a mean one," and keep the pilot "on his toes."

     https://aerofred.com/details.php?image_id=80412#plan

Maybe it being so short coupled had something to do with that.

I recently finished a plans-built BiSlob, and find it to be twitchy, which is probably not really what I enjoy flying.

Dave


Offline Air Ministry .

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Re: i build my first biplane
« Reply #12 on: February 23, 2020, 07:43:25 PM »
Dont know if thats a NYLON elevator horn ! ?

You have to be very carefull with controls .  Bullet Proof .

Steel 1 inch arm ( 25 to 28 m.m. ) and 1/8 in wire ( 3.2 m.m ) so no twisting or                slack  .

Most people use 4 inch ( 100 m.m. ) bellcranks with maybe 22  arm . Carbon Fibre ( Arrow Shaft ) pushrod .

Controls are one of the most important parts of the aeroplane .

that Asside , its looking good . What are the cabane struts made from .Not Steel wire ? .

 H^^

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #13 on: February 26, 2020, 08:02:49 AM »
Horn made from Ф3.2 mm strong durAl  bar , it bar use to Argon welding for ALMg  alloy
Nylon  part is connecting  horn arm  with carbon pushrod .
 Horn arm  have thread and nylon connector too ,  i can turn connector to high or low for change to ratio .

Offline FLOYD CARTER

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Re: i build my first biplane
« Reply #14 on: February 27, 2020, 10:21:20 AM »
Has anyone else noticed?  The wire to the elevator pushrod seems very small.  Is the pushrod straight?  Any bends in it?  Be careful there is no flexing in the pushrod.
"Growing old is easy.
 Staying old is hard"
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Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #15 on: March 01, 2020, 12:26:24 PM »
Now pushrod  is stright  , diameter  2mm Bicycle spoke
( it may be  3.2mm Al)
that do you think ?

Offline Air Ministry .

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Re: i build my first biplane
« Reply #16 on: March 01, 2020, 08:31:03 PM »
3/32 inch , is 2.4 mm .

In Kiwiland in 76 , the wire was ' S .W.G. ' which is English Sizes . 10 G = 1/8 In ; 8 G. = 1/10 in .

2.7 mm was a good size , more ' bearing area ' than 2.4 , and for other things . But .35 models & .15 Combat wings at the ton . 160 + kph .

PUSHROD ends at 3 mm diameter will save some weight over 3.2 mm ( 1/8 ) Wire . But either is o.k. ,

Best to have the ' L ' bend at the end say 25 mm to pushrod . say 38 mm ' binding ' to rod . So Wire 2 1/2 inch say 65 mm overall .

i whack the pushrod end over , then cut the bent end tto 3 mm high , to stick in hole , or slot for fine setting , then epoxy & bind
with strong thread . Pushrod on the OUTSIDE of the tube .

Offline Air Ministry .

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Re: i build my first biplane
« Reply #17 on: March 01, 2020, 08:45:38 PM »
Couple a pictures , out of a Staler 76 in a 9 now 0 80 ounce 800 sq in plane .  1/8 inch - 3.2 m m Wire .





Often the pushrod at the bellcrank , the C.F. rod needs to start ' past the arm ' , mainly to clear the leadout wire .
Therefore the wire at that end, may be way longer . like 4 inch , plus . Over 100 m.m. , to get good adhearance on / to pushrod .

If you build em tough .

Offline Air Ministry .

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Re: i build my first biplane
« Reply #18 on: March 01, 2020, 08:53:41 PM »
Some in a STREGA - 90 Oz . 1/8 wire .



60 inch Mustang Bellcrank .



https://stunthanger.com/smf/stunt-design/60-span-51-size-p-51-mustang/

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #19 on: June 27, 2020, 06:02:16 AM »
Hello Friends !
 During  3 month i was hard working in bicycle  service , I back to build my biceps project
now .
I  cover wings flaps and stab by monocote .


 was painting  fuselage .
wife and daughter made to me two  variants of pilots


construction of fuselage make possible  simple changing of pilots body by "SCREW IN THE ASS "
engine , tank and other parts ready to installation . 


Offline Air Ministry .

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Re: i build my first biplane
« Reply #20 on: June 28, 2020, 06:32:15 PM »
 8)

Online john e. holliday

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Re: i build my first biplane
« Reply #21 on: June 28, 2020, 07:40:52 PM »
Love the colors.  H^^
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530  Have fun as I have and I am still breaking a record.

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #22 on: July 06, 2020, 12:28:13 PM »


 i think , needed circle on the lower wing or no ?
 may be no ...

Offline Peter Grabenstein

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Re: i build my first biplane
« Reply #23 on: July 08, 2020, 10:21:54 PM »
I believe nobody can pay attention to it during flight  8)

 H^^
Peter
I hate pessimists, I prefer optimists.
Impossible is done immediately, miracles take longer.
I don't care who your father is ......... as long as I fly here,
Nobody walks, runs, floats or flies across my circle ......... not even to fetch fish, wine or bread.

Online David Hoover

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Re: i build my first biplane
« Reply #24 on: July 09, 2020, 10:22:21 AM »
Love it!!!!
Life is simple. Eat. Sleep. Fly!
Best, Hoovie

Offline Gerald Arana

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Re: i build my first biplane
« Reply #25 on: July 09, 2020, 02:52:13 PM »
Personally, I'd go with the Fox on a 12 X 6 at 10 K. I ran one that way and it flew beautifully. It was a mono plane......can't think of the Bleeping name. Darn old timers!

Good luck, Jerry

PS: Love the cover job!

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #26 on: July 18, 2020, 04:44:42 AM »
Hello!
made  5 flying on this week , 
engine FOX 60 Eagle  (abc p/l)
Bipe  very sharp - maneuvr .
speed is good-comfortable
prop 13.5/6or7
I  tried  to fly with different  position of cable on inner wing end  and  made choice of comfortable position .




Offline Oldenginerod

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Re: i build my first biplane
« Reply #27 on: July 19, 2020, 03:57:11 AM »
Wooden venturi?? That's a new one to me.  Well done with the build.
Rod.

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #28 on: July 19, 2020, 07:09:28 AM »
I made   wooden ventury several times on different engines .
It s simple.
 Easy to  grind  by conventional drill or screwdriver , no need  lathe.
 just  soak this part in  fluid epoxy ( before installing)  S?P .
It may been resistant  to methanol and nitro.


we are the people also  not iron and no eternal H^^


Online John Leidle

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Re: i build my first biplane
« Reply #29 on: September 02, 2020, 10:11:55 AM »
  Have you gotten the Biceps in the air yet ?

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #30 on: September 12, 2020, 04:03:33 AM »
Yes I started  to fly   month ago , but  Bipe is CrAzy  %^@



Yesterday i was reduced rudder and flap costs , distance between cords too,
the iron cone and  muffler is heavy , but still very sharp - I will lengthen the nose S?P

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #31 on: October 03, 2020, 03:51:16 AM »
Nose  was made longer 60 millemeters  .
 Result  - more stability.
 i taking  good bipe .
 This is second trying of all figures .
 I will taining   for  better flying %^@



Offline Air Ministry .

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Re: i build my first biplane
« Reply #32 on: October 03, 2020, 06:05:51 AM »
Very Good .
Glad to see your not just playing with it . It flys very good .
Every body should have a Bi Plane . After all, real aeroplanes all have two wings .  H^^

Offline gene poremba

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Re: i build my first biplane
« Reply #33 on: October 04, 2020, 03:59:42 AM »

 Looks like it flies very well. Nice job all around!.....Gene

Offline Oldenginerod

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Re: i build my first biplane
« Reply #34 on: October 06, 2020, 01:05:17 AM »
Nice steady engine run also.  It was really stable even through all the twists & turns. AP^

Online john e. holliday

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Re: i build my first biplane
« Reply #35 on: October 07, 2020, 12:01:24 AM »
Looks like it is doing good even though it may be a little fast.   Might try a lower itch prop as you don't say which prop you have.  On my 38 Special I have an LA 40 using an Top Flight 11-4 prop on 60 foot .018 lines. D>K
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530  Have fun as I have and I am still breaking a record.

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #36 on: October 11, 2020, 10:52:52 AM »
fuel 80/20 methanol/castor
 line 53 feet , because quickly
 propeller

Offline FLOYD CARTER

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Re: i build my first biplane
« Reply #37 on: October 11, 2020, 01:11:39 PM »
Your biplane has nice proportions, and looks good in the air.  With your large engine, you should do better with longer lines.  53 feet lines would be normal for a .35-size plane..
"Growing old is easy.
 Staying old is hard"
AMA #796  SAM #188  LSF #020

Online Ty Marcucci

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Re: i build my first biplane
« Reply #38 on: October 11, 2020, 01:53:50 PM »
I would utilize lines that give you a 5.2 +/- second lap time. Plus open up the maneuvers so they occupy 45 degrees of arc. Smooth counts. Great promise, you and the model. H^^ y1
Ty Marcucci

Offline Michael Novobrantsev

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Re: i build my first biplane
« Reply #39 on: October 12, 2020, 10:40:24 AM »
I will happy flying on more long lines , but nearest site  for everyday training  so small. On beginning build bipe  i was wanted  more  powerfull and heavy plane for this  small circle , because  i made bipe  thinking that  just bipe compact size and  powerfull engine  for sharp maneuvers on 53ft lines . every sunday i going to big area and fly on 63 ft  lines .
 I like it !
Time and space added in sphere. I dream on small circle training learn me flying more sharp and clear.
 Today i try to used 12.5x6 prop - 4-2-4 transitions occur more easy, traction almost did not decrease .
I think 13.5 slightly heavy to my engine,
 Tomorrow i  try  13x6 prop.

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