gibb

My Feedback: (7)

Fellas, the cylinder head of my engine sits very low behind the lower section of the cowl. Have any of you had cooling issues with a single cylinder engine? Also, have you cut any addition.al holes in the cowl for air exit?

Jim

butlern

My Feedback: (15)

Jim, that should not be an issue, as long as you baffle the engine such the airflow is forced over the cylinder. The side cowl flaps should afford plenty of negative exit pressure to ensure extraction of the hot air... as long as the baffling is close and tight to the cylinder and stops airflow around the top and side of the engine.

I have a radial, but both upper and lower cylinders are in the same situation as your lower single cylinder. My baffling has worked well and none of the cylinders are running any hotter that the others, regardless of their location.

See my installation on page 17, post 413: http://www.rcuniverse.com/forum/fb.asp?m=9201680

Happy new year, everyone!

Noah

Kinner

Deepest condolences for your loss Chic.

My Dad too, was a turret gunner during WWII.  Mostly PBY and PB4Y with an occassional hop in the turret of a TBF/M.  He really didn't like flying backwards especially in a glide bombing dive.  Made him quite sick he told me.

Ray W

Fleet Brotherhood #7

peter w h

"HOW DOES THIS THING WORK AGAIN" ???????

redtail

My Feedback: (15)

Firebar, you are a very special guy. Hope to fly formation with our Avengers one day. Many thanks. Chic

peter w h

Hey guys,

More pics., still have to dirty it up with some weathering.

Peter

Kinner

Is that a functioning castle nut on the axle??  If so, what thread size did you use?

Ray W.

peter w h

Hi Ray,

The nut is 1/4 -28

Kinner

Thanks. I'm assuming that is National Course? Second, where did you get the nut? Same place as the rivets?

In my aviation world, I can't find 1/4-28 Course ..only fine and not castleated. Perhaps a Nylock would work but wouldn't look as cool. You got to put some excess grease coming from the center. I believe a hub cap was on the orginal.

I had some great 35mm of the gear from a plane I worked one time oh so long ago. Long gone I fear.

Ray W.

WARBIRDRCER

My Feedback: (22)

Aircraft Spruce

http://www.aircraftspruce.com/catalo.../an310_320.php

Cad Plated AN310-4 1/4-28

MS17825-4 1/4-28 Self Locking Castle

butlern

My Feedback: (15)

Peter,

I see that you were able to manage a full-length torpedo bay... I must not have done enough thinking about positioning the MokI and associated accessories

How and where are you stuffing the fuel tank, ignition, throttle & choke servos, and batteries?!?! I think I recall that you made you own custom tank(s) (like side saddles?), but now I cannot remember for sure.

Looks like you also made a false firewall for the motor mount... can you snap a picture when you get a chance?

Looking REALLY good (but yes, a little too clean hahahahah).

All the best,

Noah

Kinner

Thanks Warbird.

I'll opt for the SS version.  My experience with the CAD hardware was tight tolerance.   Still, I bet it is Fine thread and not UNC.  All considered, a UNF die wouldn't be that far removed.  I've one of those.

Ray W.

WARBIRDRCER

My Feedback: (22)

¼ 28, I believe are considered Fine Thread, normally ¼ 20 were the Course Thread ¼ hardware choice.

U.S. Department of Transportation Federal Aviation Administration

Advisory Circular AC 43.13-1B

CHAPTER 7. AIRCRAFT HARDWARE, CONTROL CABLES, AND TURNBUCKLES

SECTION 4. NUTS

7-63. General........................................... .................................................. .................................................. .........7-11
7-65. Nut Identification - Finishes .................................................. .................................................. ...................7-11
7-66. Castle Nut (AN310)........................................... .................................................. .......................................7-12

From TABLE 7-1

Thread Size

FINE THREAD SERIES

8-36
10-32
1/4-28
5/16-24
3/8-24
7/16-20
1/2-20
9/16-18
5/8-18
3/4-16
7/8-14
1-14
1-1/8-12
1-1/4-12

COARSE THREAD SERIES

8-32
10-24
1/4-20
5/16-18
3/8-16
7/16-14
1/2-13
9/16-12
5/8-11
3/4-10
7/8-9

AC 43.13-2B - Acceptable Methods, Techniques, and Practices - Aircraft Alterations

STRUCTURAL DATA

Chapter 1, Paragraph 108.

FASTENERS. Use hardware conforming to an accepted Government or industry standard such as AN, NAS, TSO, or MIL-SPEC. Attach equipment in such a way that prevents loosening in service due to vibration.

However this may be your resourse for SS Stainless Steel Hardware for aircraft use.

SkyBolt Aerospace Fasteners

http://www.skybolt.com/index.htm

AN310-4 Castle Nut 1/4-28: I found these listed in the SkyBolt Stainless Hardware section.

If not please let me know and I will dig through my old hardware stock and see if I have any I can send you; free of course for a fellow modeler

peter w h

Hey Noah,

Here is a mock-up of the maximum room availible which translates to just over 70.2 oz.
Obviously way too big but that is whats there to work with.
What size are you running and how long a flight do you get?

I think a reduction of 30 percent and fabricated from .040" aluminum should be ok and no too heavy.

Kinner

I've delt with Skybolt over the years with their cowl fasteners and they have become quite pricey.   Spruce usually has no min. quantity and I've an account with them so I'll go to them for some hardware.  I've all the cotter keys in bench stock.

I've had problems with the Cadmium plating on hardware as it seemed to fill the threads on bolts and nuts.  Nice corrosion resistance but not needed on the Avenger model. 

Ray W.

peter w h

Should be using zinc plated not cad..

WARBIRDRCER

My Feedback: (22)

Kinner, understand about the cad plating. It has its place, but not RC. Thanks for the tip on Spruce.

Peter w h, agreed on the zinc hardware.

Amazing how a conversation can be kicked off about full scale (scale) hardware. Only on a RC scale build thread could a builder benefit from this information. The planes on this thread are amazing.

I can also tell you this Avenger looks great in flight from seeing Noah’s airborne. Amazing plane, and Noah makes its operation look effortless. I will capture some video of it this year and share it here.

Thanks for sharing your builds guys. I enjoy the progress photos.

butlern

My Feedback: (15)

Looks great, Peter!

I wish I had spent more time thinking through my motor installation, so I could have finished off my cockpit properly... seems you got the Moki snuggled in there perfectly!

I have a 32 oz. tank installed, and I bet I could easily get 15-20 minutes when flying around 3/4 throttle. That said I generally only fly for about 8-12 minutes. When I come down and refill (or de-fuel), I know I have at least 10-12 oz. left in the tank.

I can't wait to see you torpedo drop mechanism!! (I still need to finish my installation).

All the best,

Noah

peter w h

Latest.

glazier808

My Feedback: (1)

As always....

lkahn4

Peter
Did you ever think of working for the movie industry, love the instrument panel detail.

Larry

peter w h

I have always thought of myself as a leading man,, sort of Cary Grant type ,, ???? NOT.

You mean as a modeler I bet HAHA.

Too cold and wintery for maiden unitll spring now Larry.

Thanks Casey



Peter

lkahn4

Peter,
Weather has been in to mid 40''s - low 50's but it's either too windy or light raqin.. can't wait to get the maiden flight in...

peter w h

Anyone seen my knife????

Kinner

Could have lost your wrist watch.  X-actos are cheaper.

Ray W,