Two questions regarding UH-1 assembly

I have used soft foam rubber with sucess on engine nacelles and cockpits to keep out the dust and overspray before.  Just cut a litle oversize and lightly fit in the openings.  With wet sanding, just put a tape dam above the openings after your close them off, and dry excess as you go.  Stick the lower edge of the tape to the model and let most of the tape width stick straight up to deflect water like a rain gutter.

Washing the whole thing just before painting is an option, just need to allow time for all the water in the crevices and nooks/crannies to dry completely.

If you are talking about the flat plate just forward of the tailboom attachment point, it is part of the IR suppression system.  It deflect the heat from the oil drain tubes.  If my cut&past did not work, here a link.

https://www.google.com/search?q=ir+supressor+kit+uhi1&biw=1159&bih=804&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjqyMaUnezOAhVG1CYKHfx5A80Q_AUIBygC#tbm=isch&tbs=rimg%3ACSZPRwwEGXWgIjhfIp3ZhYJeb6jQBmJO1SJ7GhlyRyj9v6Mr0QKFaUWT3Mr4alN914Wi27mN0t-AcZ_1meUkD99cQ9yoSCV8indmFgl5vEc9uGdcaOrJCKhIJqNAGYk7VInsR7iZeLjlHegsqEgkaGXJHKP2_1oxFntpA7p80dAyoSCSvRAoVpRZPcEXUbvazExlVVKhIJyvhqU33XhaIRhiGUGvsb7nMqEgnbuY3S34BxnxH3x6X7VVZ-uyoSCeZ5SQP31xD3Ebg0UHEx79GT&q=uh1%20huey&imgrc=Ksfg8pZgoT_8aM%3A

Hello!

Let's start with a photo of the real thing first:

Which one do you mean? The large black one is the so-called "hell hole", there should be an opening there going all the way up to the main gearbox.

As for protecting the cockpit - you can do a lot of things and clean most of the dirt through the large doors - if they are open or removable. If the doors are closed/fixed, you probably have to make sure  they are sealed right, so as not to et the dust in. As I wrote, it's best to do most of the sanding while the insides are still acessible (although the fuselage might be glued then).

Hope it helps, good luck with your build and have a nice day

Paweł

Many thanks to all for the helpful advice on keeping sanding residue at bay.  Will use a combination of all suggestions to completely eliminate problems when the time comes.

The square cover(?) Im curious about appears to be found only on some military varients.  Pics respectfully borrorowed from the web.  First one shows the actual item in question circled.  The second photo shows the LOCATION of where it would be found (if equipped).

OK, since I can't get the damn photos to upload here, find a military Huey kit and turn it over.  Apx midway towards the back is where the hoist hole should be, then just behind you'll see the groove & cross tube for the rear portion of the skids, NOW just behind that on some Hueys there is a shallow square pan. That is the item I am referring to.  Need to know WHAT it is so I'll know whether to keep it or omit it.

Toshi

Hi Pawel

I have the same problem posting  photos, as in my first reply, I think you are referring to the IR Suppressor kit.  The square plate attached at each corner.  In order from front to rear is the hell hole (cargo hook placement) in font of aft cross tube.  A secondary hell hole cover (circular screwed cover), and then the IR Suppressor plate at the end of the cabin and fwd of the tailboom attachment point.  This is a part of the overall suppressor kit also consisting of the exhaust IR suppressor or toilet seat. Use this link to see the pic I was trying to post.

https://www.idrive.com/idrive/sh/sh?k=b7b8t8a3v3

Hi Huey638, thank you for your continued help with this.  I joined PhotoPHucket, uploaded two clear photos and still can not get pics to this forum, or even the URL for that matter.  So close but so very far.

The photo you have showing a metal plate attached to bottom rear portion is the EXACT LOCATION, but it is a square bolted on pan (think a car's automatic transmission pan).

Out of curosity, in your pic, if that plate is part of an IR kit, I didn't think there would be anything in that location to warrent one?  Is it possible the pan of which I refer to is a type of IR supressor as well, only some tool thought it be more "fun" to mount it using about 3 dozen bolts instead of just an simple open plate as is in your photo?

I am building ihe Mon-Rvl 1/24 Huey and it is molded on the fuselage halves.

Toshi

From what I undarstand, I depends on the model of UH-1 your asking about. The D model had an oil pan bulge behind the rear skid. This was removed and replaced by a cut out for the oil cooler fan with a screen on the H model. The photo above of the orange and white huey is an H model. Gary

Toshio-  To post up a pic, hit share on the PB pic and on the hit the URL line.  It will flash copied, then come over to here and on a reply (not quick reply) put in your text, hit enter to move to a fresh line.  In the icons box look for the scissors and two other icons (bottom left).  Hit the right one and the URL will appear.  To add more pics, hit enter to get a fresh line and repeat.  When you hit post reply the pics will show up.

Alright, at last I have posted the two photos I've been fighting all morning!

.

.

Centaur567

From what I undarstand, I depends on the model of UH-1 your asking about. The D model had an oil pan bulge behind the rear skid. This was removed and replaced by a cut out for the oil cooler fan with a screen on the H model. The photo above of the orange and white huey is an H model. Gary 

You are incorrect on the oil cooler bulge on early UH-1Ds.  All long-bodied Hueys (UH-1D/H/N) had/have rectangular cut-out with the oil cooler tucked up inside the fuselage.

Here is a Vietnam-era UH-1D/H showing the cut-out with the oil cooler inside. 

and a more modern UH-1H showing the cut-out.

The square bulge was present on short-boadied UH-1B/C models and did contain the oil cooler, which stood proud of the fuselage due to a space issue. 

UH-1B/C w/oil cooler bulge.  You can just make out the bulge in the below pics.

The issue with most UH-1D/H kits still having the bulge comes from the original Revell UH-1D kit from the late '60s which incorrectly had the bulge and all other companies copied that feature.  If you are building a long-bodied Huey, the bulge should be removed and replaced by the cut-out.

Additionally, the orange and white helo above is actually a twin-engine UH-1N, which also has the opening for the oil cooler.  Not sure what type your video game Huey in your pic is supposed to be since the US Military never used that gun configuration.  Aussie UH-1D/H Bushrangers did use the forward miniguns and rear M60s though.

The issue you have is confusing the type of Huey you are looking at.  Your pics are of short-bodied UH-1B/C Hueys.  These versions did have the oil cooler bulge.  Long-bodied UH-1D/H/N models have the cut-out with the oil cooler inside as I showed above.

Hi, HeavyArty.

Thank you for your response and the use of one of your photos (It was the clearest on I could snag), so again thank you.

That was my delima.  My 1/24 Mon-Rvl Huey short body B/C)  has this square pan molded on and I had no idea WHAT it was.

So there would be an oil cooler inside that cover.  I never would've guessed that.  Thank you so much!

HeavyArty

 

 

Centaur567

From what I undarstand, I depends on the model of UH-1 your asking about. The D model had an oil pan bulge behind the rear skid. This was removed and replaced by a cut out for the oil cooler fan with a screen on the H model. The photo above of the orange and white huey is an H model. Gary 

 

 

 

You are incorrect on the oil cooler bulge on early UH-1Ds.  All long-bodied Hueys (UH-1D/H/N) had/have rectangular cut-out with the oil cooler tucked up inside the fuselage.

Here is a Vietnam-era UH-1D/H showing the cut-out with the oil cooler inside. 

and a more modern UH-1H showing the cut-out.

 

The square bulge was present on short-boadied UH-1B/C models and did contain the oil cooler, which stood proud of the fuselage due to a space issue. 

UH-1B/C w/oil cooler bulge.  You can just make out the bulge in the below pics.

The issue with most UH-1D/H kits still having the bulge comes from the original Revell UH-1D kit from the late '60s which incorrectly had the bulge and all other companies copied that feature.  If you are building a long-bodied Huey, the bulge should be removed and replaced by the cut-out.

Additionally, the orange and white helo above is actually a twin-engine UH-1N, which also has the opening for the oil cooler.  Not sure what type your video game Huey in your pic is supposed to be since the US Military never used that gun configuration.  Aussie UH-1D/H Bushrangers did use the forward miniguns and rear M60s though.

 

 

I have no idea where you are ghetting your info, Gino, but that is NOT an oil cooler bulge.  It is the ADF Sense antenna (number 9) visible on this UH-1B dash 10 figure.  The UH-1A,B,C,E,K,L, and M all had the Sense antenna on the belly right behind the skids.

   Ray

Toshi,

  The Monogram 1/24 kit is a UH-1B.  It is an old kit, but dimenionally correct as fara s I can tell.  If you let us know what markings you will be using, we may be able to help with some specifics mods if you are interested.  If you are building the armed versions, you are pretty much limited to early B models as the M16 quad M60 gun system which comes in the kit was only used up unitil about 1966 or maybe early 67 in Vietnam.

    Ray

rotorwash

I have no idea where you are ghetting your info, Gino, but that is NOT an oil cooler bulge.  It is the ADF Sense antenna (number 9) visible on this UH-1B dash 10 figure.  The UH-1A,B,C,E,K,L, and M all had the Sense antenna on the belly right behind the skids.

   Ray

I have been told that was where the oil cooler was on the short-bodied Hueys, I guess not.  Either way, it is not a feature seen on long-bodied Hueys and should be removed from any long-body kit that has it.

HeavyArty

 

 

rotorwash

I have no idea where you are ghetting your info, Gino, but that is NOT an oil cooler bulge.  It is the ADF Sense antenna (number 9) visible on this UH-1B dash 10 figure.  The UH-1A,B,C,E,K,L, and M all had the Sense antenna on the belly right behind the skids.

   Ray

 

 

I have been told that was where the oil cooler was on the short-bodied Hueys, I guess not.  Either way, it is not a feature seen on long-bodied Hueys and should be removed from any long-body kit that has it.

 

Agreed, but he has the 1/24 Monogram B model kit.  The ADF antenna definitely belongs on the belly of that aircraft.

  Ray

No idea if this has been discussed before but I believe there was a "field mod" done on some Hueys re the oil cooler.

Basically a sheet of armour plate with standoffs to keep it about 4-6 inches beneath the belly to protect the oil cooler from small arms fire but allow for good air flow.

The armour plate was slightly larger than the oil cooler opening. Probably thick enough plate to stop a 7.62 round.

Hope this makes sense. Saw some photos of it in a USA pilot vet's log book. I asked and he explained what it was for. 1974 so that about all I remember.

I assume some scrounged plate, some long AN bolts and some tubing to provide the standoff distance. Four standoffs one at each corner.. probably scrounged hydraulic tubing, rivnuts to replace 4 rivets on the belly and AN washers on each side of the plate and one on the belly for each standoff.

Oh yeah just trivia but the oil cooler was run by bleed air off the engine. The fan ran at very high speed and if the bearings started to fail you knew it immediately due to a high pitched scream. 

Perhaps model makers portrayed this mod as a box?

What you are describing is the armor plate that was part of the ASE (Aircraft Survivability Equipment) added in the early '70s.  The ASE set also included the toilet bowl exhaust, cooling covers on the sides of the engine cowls, and a particle separator on the main intakes.  It was not a field mod though, but a MWO-applied kit.

You can see most of the ASE parts on the ROK Huey below.

Thanks for the info.

HeavyArty

What you are describing is the armor plate that was part of the ASE (Aircraft Survivability Equipment) added in the early '70s.  The ASE set also included the toilet bowl exhaust, cooling covers on the sides of the engine cowls, and a particle separator on the main intakes.  It was not a field mod though, but a MWO-applied kit.

You can see most of the ASE parts on the ROK Huey below.

 

Actually most of the ASE upgrades came out in the 80's. The two exceptions are the toilet bowl and engine cowl covers which came out in the early 70's in Vietnam and the APR 39 blisters were added in the late 70's.  Also, it is NOT armor plate.  It was a heat shield for the oil cooler to mask it from heat seeking missiles fired form below.  I doubt it would stop a 22!  Here's a couple of better shots of it on a UH-1H at Ft. Eustis I took this spring.

   Ray

The photos I saw had single post standoffs and the plate was much thicker. I saw the photos in 1974 so perhaps there was a field mod done beforehand...according to the stories told there were quite a few "in unit" mods carried out. I reserve the right to be wrong. At the time I was flying a DHC-3 Otter on the James Bay Power project in northern Quebec Canada and a huge precentage +_ 30% of the helicopter pilots were Vietnam vets ..some only back in North America for 4-6 months. Great guys.

sharkbait

The photos I saw had single post standoffs and the plate was much thicker. I saw the photos in 1974 so perhaps there was a field mod done beforehand...according to the stories told there were quite a few "in unit" mods carried out. I reserve the right to be wrong. At the time I was flying a DHC-3 Otter on the James Bay Power project in northern Quebec Canada and a huge precentage +_ 30% of the helicopter pilots were Vietnam vets ..some only back in North America for 4-6 months. Great guys.

 

Very interetsing.  I don't doubt you saw what you claim, sir.  Lord knows there are no absolutes when it comes ot Huey mods.  I would love to see a photo.  Was it an Army pilot's log book or Air Force pilot's log book you saw the photos in?  

   Ray

rotorwash

Also, it is NOT armor plate.  It was a heat shield for the oil cooler to mask it from heat seeking missiles fired form below.  

I thought it was actually a heat shield, but wasn't sure.  Thanks for confirming my suspicion.

Geez Ray

Long time ago in a tent in the bush..but the pilot was US Army.

As I stated..just going by memory.

I could well be wrong.