News:


  • March 28, 2024, 07:26:03 AM

Login with username, password and session length

Author Topic: Hatch Access For all the "E" Stuff?  (Read 831 times)

Offline Avaiojet

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 7468
  • Just here for the fun of it also.
Hatch Access For all the "E" Stuff?
« on: January 23, 2022, 11:14:20 AM »
I see in conversions plus in general, all on board gear is located where the tank would normally be. Is this correct?

My interest is the size of these openings? Height, width and length inside the box.

I have to make a hatch in front of the cockpit and behind the cowling then box it in for the on board gear, I don't want to make this too large or too small.

 I believe I can place the battery pack behind the firewall, "vertical." The rest of the stuff can be placed through the hatch I'll be making.

I was hoping to keep "everything" in the cowling but it looks as though this isn't possible. That motor mount is 3" x 3" and the cowling is 7" in diameter.

I'd also like to eliminate that small arched piece and just glue it. Keep the nose as clean as possible. With a hatch behind it I should be able to do this?

Thanks in advance.

Charles
« Last Edit: January 24, 2022, 07:06:43 AM by Avaiojet »
Trump Derangement Syndrome. TDS. 
Avaiojet Derangement Syndrome. ADS.
Amazing how ignorance can get in the way of the learning process.
If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   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.

Online Ken Culbertson

  • 24 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 6035
Re: Hatch Excess For all the "E" Stuff?
« Reply #1 on: January 23, 2022, 11:44:43 AM »
Charles:

Where does the air coming in the front exit?  What ESC and timer are you using?  You have to have airflow over all 4 components, motor, battery, esc and timer.   Wire length matters but in your case probably not too much.  You might need to use the cockpit as a vent!  You need "per flight" access to the battery and timer.  From what I can see, and assuming you have open vents for the radial cowl, I would put the battery vertical behind the firewall, the timer under the removable hatch cover and the ESC over/under the motor mount or on a slide out tray behind the hatch. 

Looking at it again I am wondering how you are going to get the battery in and out without removing the cowl? 


Ken
AMA 15382
If it is not broke you are not trying hard enough.
USAF 1968-1974 TAC

Offline Avaiojet

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 7468
  • Just here for the fun of it also.
Re: Hatch Excess For all the "E" Stuff?
« Reply #2 on: January 23, 2022, 12:27:12 PM »
Charles:

Where does the air coming in the front exit?  What ESC and timer are you using?  You have to have airflow over all 4 components, motor, battery, esc and timer.   Wire length matters but in your case probably not too much.  You might need to use the cockpit as a vent!  You need "per flight" access to the battery and timer.  From what I can see, and assuming you have open vents for the radial cowl, I would put the battery vertical behind the firewall, the timer under the removable hatch cover and the ESC over/under the motor mount or on a slide out tray behind the hatch. 

Looking at it again I am wondering how you are going to get the battery in and out without removing the cowl? 


Ken

Ken,

Thanks for the help.

If you visit the TEXACO 13 build, you will see there's a "tunnel" which starts at the motor mount, a 3" x 3" opening and exits at the cockpit. So, you guessed it, air will exit from the cockpit and from the cowling rear perimeter.

I haven't decided on an ESC or Timer yet. With my mind, I need the simplest. In another Thread, recommendations were made and I'm looking into this. You replied to that thread.

Yes, unfortunately, I'll have to remove the cowling to replace the battery. Four 4-40 bolts for this from the front of the cowling. The cowling former is removed with the cowling in place. OR! Removal of the four screws which hold the cowling to the cowling former. The first method is really easy, I took care to make sure everything lined up.

Thanks again.

Charles
Trump Derangement Syndrome. TDS. 
Avaiojet Derangement Syndrome. ADS.
Amazing how ignorance can get in the way of the learning process.
If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   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.

Online Ken Culbertson

  • 24 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 6035
Re: Hatch Excess For all the "E" Stuff?
« Reply #3 on: January 23, 2022, 01:02:37 PM »
Ken,

Thanks for the help.

If you visit the TEXACO 13 build, you will see there's a "tunnel" which starts at the motor mount, a 3" x 3" opening and exits at the cockpit. So, you guessed it, air will exit from the cockpit and from the cowling rear perimeter.

I haven't decided on an ESC or Timer yet. With my mind, I need the simplest. In another Thread, recommendations were made and I'm looking into this. You replied to that thread.

Yes, unfortunately, I'll have to remove the cowling to replace the battery. Four 4-40 bolts for this from the front of the cowling. The cowling former is removed with the cowling in place. OR! Removal of the four screws which hold the cowling to the cowling former. The first method is really easy, I took care to make sure everything lined up.

Thanks again.

Charles
Betcha a nickle we can find a way to slide the battery into place without having to take off the cowl.  You forgot the prop has to come off too.  Did the spinner screw fall into the grass?   Go to a contest some time and see what causes about half of the attempts.  Loose props.  Less of a problem with electric but still there.  Put in a ramp that will let the battery slide into place with the hatch off and mount the ESC and timer on the hatch bottom so that they are out of the way when you slide the battery in.  You owe me a nickle.

ken
AMA 15382
If it is not broke you are not trying hard enough.
USAF 1968-1974 TAC

Offline pmackenzie

  • Pat MacKenzie
  • 24 supporter
  • Trade Count: (0)
  • Captain
  • *
  • Posts: 765
Re: Hatch Excess For all the "E" Stuff?
« Reply #4 on: January 23, 2022, 01:20:23 PM »
There should be enough cooling air exit between the rear lip of the cowl and the fuse, this is where it would have been on the full scale model.
It might have had cowl flaps for take-off/landing. If so, you could add them but fixed open.

Why not split the cowl horizontally to access the battery, perhaps leaving the front ring in one piece?
MAAC 8177

Online Ken Culbertson

  • 24 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 6035
Re: Hatch Excess For all the "E" Stuff?
« Reply #5 on: January 23, 2022, 01:36:15 PM »
There should be enough cooling air exit between the rear lip of the cowl and the fuse, this is where it would have been on the full scale model.
It might have had cowl flaps for take-off/landing. If so, you could add them but fixed open.

Why not split the cowl horizontally to access the battery, perhaps leaving the front ring in one piece?

Or that!  Where are the panel lines on the real thing?  Great place for a real panel!  While I am at it, is the fake radial going to block much of the airflow into the cowling?


Ken
AMA 15382
If it is not broke you are not trying hard enough.
USAF 1968-1974 TAC

Offline pmackenzie

  • Pat MacKenzie
  • 24 supporter
  • Trade Count: (0)
  • Captain
  • *
  • Posts: 765
Re: Hatch Excess For all the "E" Stuff?
« Reply #6 on: January 23, 2022, 01:49:46 PM »
I just looked at the picture of the real one that was up on his RCG thread.
https://static.rcgroups.net/forums/attachments/2/2/1/9/2/1/a15755323-235-7212%20%281%29.jpg
The cowl is split in 4 equal pieces, with the seams running all the way from front to back, rotated 45 degrees.
So top section would be just about perfect as a hatch.

If you look at the way radial cowls work, they are much more streamlined then they would appear at first glance.
The hole is the sized for the correct amount of cooling air, and it flows through the cowl then around the rounded nose on the fuselage.
So they don't really block the flow, they simply direct the portion required through the engine.
MAAC 8177

Offline Avaiojet

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 7468
  • Just here for the fun of it also.
Re: Hatch Excess For all the "E" Stuff?
« Reply #7 on: January 23, 2022, 02:57:06 PM »
Ken, Pat,

Both of you have come up with great suggestions. Thank you.

I think the cutting the fiberglass cowling in half may work. I wouldn't have to cut a hatch.

I also think sliding the battery in from the front is also a great idea. I'll examine this possibility.

The smaller the ESC and Timer are, the better. Maybe all this stuff could fit in the cowling.

I think it's time for me to have the ESC and Timer in hand so I can figure this out using your suggestions.

I'm still in the dark as which ESC and Timer to purchase.

Thanks again for the help.

Charles

I just took this photo. You can get an idea as to the room I have under the cowling. Equipment can be attached to the sides of the firewall extension.
Trump Derangement Syndrome. TDS. 
Avaiojet Derangement Syndrome. ADS.
Amazing how ignorance can get in the way of the learning process.
If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   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 Avaiojet

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 7468
  • Just here for the fun of it also.
Re: Hatch Excess For all the "E" Stuff?
« Reply #8 on: January 23, 2022, 05:14:44 PM »
Or that!  Where are the panel lines on the real thing?  Great place for a real panel!  While I am at it, is the fake radial going to block much of the airflow into the cowling?


Ken

Ken,

It may block a little, but the one I plan on using has cylinders that look real, not just something that was vacuum formed or made with resin.
It's a William's Brothers, so air will go between the cylinders.

Charles
Trump Derangement Syndrome. TDS. 
Avaiojet Derangement Syndrome. ADS.
Amazing how ignorance can get in the way of the learning process.
If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   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 FLOYD CARTER

  • 24 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 4458
    • owner
Re: Hatch Excess For all the "E" Stuff?
« Reply #9 on: January 23, 2022, 07:46:54 PM »
My hatches are not "excess".  I really do need them

But as far as hatch "access"....Yes, access is important, especially if you need to get to  the inside of your fuselage.
89 years, but still going (sort of)
AMA #796  SAM #188  LSF #020


Advertise Here
Tags:
 


Advertise Here