RE: H9-F6F Hellcat 60 ARF   
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
    Search This Thread  
 
Printable Version

All Forums >> RC Airplanes >> RC Warbirds and Warplanes >> RE: H9-F6F Hellcat 60 ARF
Page: <<   < prev  47 48 49 50 51 52 53 54 55 [56]

Login
Message << Older Topic   Newer Topic >>
RE: H9-F6F Hellcat 60 ARF - 11/7/2009 1:18 PM   
chuck993


 

Posts: 628
Score: 100
Joined: 1/17/2007
Last Login: 11/17/2009
From: Virginia Beach, VA, USA
Status: offline 		I have a zenoah G20EI sitting around that I keep thinking of putting in the hellcat, but I figured it would weigh too much and make it a sled on dead sticks. What do you think? Also, what did you do for re-enforcing the horizontal stab?

Hide Signatures

(in reply to RBean)
       Post #: 1376

RE: H9-F6F Hellcat 60 ARF - 11/7/2009 2:29 PM   
da Rock



Posts: 8080
Score: 109
Joined: 10/11/2005
Last Login: 11/21/2009
From: western, NC, USA
Status: offline
quote:

ORIGINAL: chuck993

I have a zenoah G20EI sitting around that I keep thinking of putting in the hellcat, but I figured it would weigh too much and make it a sled on dead sticks. What do you think? Also, what did you do for re-enforcing the horizontal stab?


That is a quandry. The OS90FX has just under 3hp and weighs what most 60s weigh. I've put them into the Corsair, Spitfire and P47 and not had to add any weight at all to balance. The glows that suit that plane are at least 10 ounces lighter than the G20EI is without it's ignition system.

They may be warbirds, but they're fighters not C130 warbirds.

The gasser mfgs definitely need to make their little guys lighter somehow.


Hide Signatures

(in reply to chuck993)
       Post #: 1377

RE: H9-F6F Hellcat 60 ARF - 11/7/2009 3:48 PM   
chuck993


 

Posts: 628
Score: 100
Joined: 1/17/2007
Last Login: 11/17/2009
From: Virginia Beach, VA, USA
Status: offline 		That was how I was feeling, I have an OS 91FS and an OS 91FX, both with a couple of flights on them, which way would you go? The 91FX would provide HP.

Hide Signatures

(in reply to da Rock)
       Post #: 1378

RE: H9-F6F Hellcat 60 ARF - 11/7/2009 6:43 PM   
da Rock



Posts: 8080
Score: 109
Joined: 10/11/2005
Last Login: 11/21/2009
From: western, NC, USA
Status: offline
quote:

ORIGINAL: chuck993

That was how I was feeling, I have an OS 91FS and an OS 91FX, both with a couple of flights on them, which way would you go? The 91FX would provide HP.


I chose the 91 over a 61 for my first H9, which was the P47, simply because I knew it'd swing a significantly larger 3-blade prop. I knew the model wouldn't really need the almost 50% increase in power. A few other guys were flying H9 Warhawks back then, and their 61s were more than adequate.

Since I wasn't looking for the extra power, I really didn't use it to begin with. Well, one day I decided to see what it did for the flying. Yeah, the plane will be faster but not much. I discovered that the speed I'd been getting with about 2/3 throttle wasn't much slower than full throttle. It had appeared to be faster with the throttle at 2/3 and darned if the extra speed did much for the flying. Until the pylon guys start up an Unlimited class based on full scale unlimited all you seem to get out of having all that extra power is a throttle that's less sensitive. The useful speed range you can get is in the first half of the stick movement. The stick doesn't change things much in it's top half of the movement.

I'd choose the weaker of those two. It still should turn a decently large 3-blader.

BTW, the 3-blader turned out to fly the suckers just as good as the best 2's I tested. You're not giving up, you're gaining from using a 3 on this plane with that engine.

Hide Signatures

(in reply to chuck993)
       Post #: 1379

RE: H9-F6F Hellcat 60 ARF - 11/8/2009 12:09 AM   
Navy0968


 

Posts: 54
Score: 100
Joined: 7/11/2007
Last Login: 11/14/2009
From: Pinecliffe, CO, USA
Status: offline 		This will supplement my previous posting of 9/15/09. Finally found the time to fully complete the "cat". Here are a few pics showing the dummy engine and pitts muffler installation.

Jim

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


Hide Signatures

(in reply to da Rock)
       Post #: 1380

RE: H9-F6F Hellcat 60 ARF - 11/8/2009 2:58 AM   
RBean


 

Posts: 204
Score: 100
Joined: 4/14/2007
Last Login: 11/21/2009
From: Easton, PA, USA
Status: offline 		Chuck993

I love my gasser. Don't miss the cost and the mess of glow. The weight is a little more than glow because not only is the engine heavier, you need an ignition battery. However, the Hellcat has a large wing and handles the weight well. It's not a floater at this weight, but its not tricky or difficult to fly. Unlike some of the heavy scale warbirds, take offs are quick and easy and the landing speed is not real fast. I did have to mount both batteries in the rear fuslage about three or four inches in front of the horizonal stablizer to get the cg correct. Stalls are gentle. It stalls and falls off on the left wing some but that it controllabe with rudder and recovery can be made with little altitude loss . I have a Top Flight P-40, and when it stalls, it snaps inverted to the left and heads straight down. Also, at this weight and with somewhat faster landings and takeoffs, the stock landing gear is marginal. My Century Jet retracts are fine. If you have a gasser and want to use it, go for it. I reinforced the horizonal stablizer by removing the top covering and placing diagonal tusses between the ribs. I reinforced the wing by adding ply wood panels that went between the retracted gear legs and the air cylinder in front of and behind the spar.

Hide Signatures

(in reply to Navy0968)
       Post #: 1381

RE: H9-F6F Hellcat 60 ARF - 11/8/2009 3:02 AM   
RBean


 

Posts: 204
Score: 100
Joined: 4/14/2007
Last Login: 11/21/2009
From: Easton, PA, USA
Status: offline 		I forgot, I did have a dead stick once and had to 360 it down to the runway and land. This is when the throttle linkage came off on Hellcat one and I had to fly around until it ran out of gass. I didn't have an electronic kill switch.

Hide Signatures

(in reply to RBean)
       Post #: 1382

RE: H9-F6F Hellcat 60 ARF - 11/8/2009 3:36 AM   
aghost



Posts: 461
Score: 100
Joined: 5/7/2002
Last Login: 11/21/2009
From: Amarillo, TX, USA
Status: offline 		chuck993: I have a Magnum XLS 91 (similar to the OS 91FX) with a Pitts style muffler in my Hellcat. I modified the firewall to rotate the engine to 9 o'clock position. Its not a trivial modification because the firewall is set up for a four stroke engine at 7 o'clock. The backside of the firewall is not flat, but has a cross shaped reinforcing for the four stoke set up, but does not quite fit the two stroke at 9 o'clock. I filled in "holes" to make the back of the firewall flat, then drilled new mounting holes. With all the firewall mods and reinforcing I had to add 3 ozs of lead on the tail.

I had the H9 Corsair and with the Magnum XLS 91 at 7 o'clock. With the Pitts muffler, the exhaust came out on the wing and left wheel well. I did not like that. Hence the current setup in the Hellcat.

To strengthen the horizontal stab, I ran a piece of carbon fiber along the bottom of the trailing edge of each side and put a white covering over carbon fiber. Worked so far.

Everything else is stock, including the retracts. 159 flights over two seasons and counting.

Brian

Hide Signatures

(in reply to RBean)
       Post #: 1383

RE: H9-F6F Hellcat 60 ARF - 11/10/2009 1:18 AM   
mrsand


 

Posts: 55
Score: 100
Joined: 4/21/2008
Last Login: 11/17/2009
From: sarasota, FL, USA
Status: offline 		My slow assembly project is within sight of completion....I am trying to mount the rear landing wheel and rudder...Could I trouble you fellows to give me the distance from the top of the rear wheel to the fuze diectly above it..for a stock wheel setup...thanks in advance for your help

MrSand

Hide Signatures

(in reply to aghost)
       Post #: 1384

RE: H9-F6F Hellcat 60 ARF - 11/10/2009 8:22 PM   
CRG


 

Posts: 182
Score: 100
Joined: 6/1/2005
Last Login: 11/21/2009
From: , CA, USA
Status: offline 		Fantastic job on the entire build, very well done.

Would love some more details on the dummy engine.

quote:

ORIGINAL: Navy0968

This will supplement my previous posting of 9/15/09. Finally found the time to fully complete the ''cat''. Here are a few pics showing the dummy engine and pitts muffler installation.

Jim



Hide Signatures

(in reply to Navy0968)
       Post #: 1385

RE: H9-F6F Hellcat 60 ARF - 11/16/2009 1:00 PM   
mrsand


 

Posts: 55
Score: 100
Joined: 4/21/2008
Last Login: 11/17/2009
From: sarasota, FL, USA
Status: offline 		I just finished sawing off my ca glued elevators and re-attached them with dubro hinged pins. Its the first time doing this. The elevators work fine..all the hinges are swinging good and are tight...however the gaps are +- 1/8 inch along the control surfaces. Is the gap to big..if so whats the right way to close it. Thanks for your advice.

MrSand.

Hide Signatures

(in reply to mr.scale)
       Post #: 1386

RE: H9-F6F Hellcat 60 ARF - 11/16/2009 3:08 PM   
CRG


 

Posts: 182
Score: 100
Joined: 6/1/2005
Last Login: 11/21/2009
From: , CA, USA
Status: offline 		Definitely too big of a gap. The pinned hinges need a groove in each surface to accept the larger section of the hinge (with the pin), though it may be too late for that. Iron a strip of UltraCote along the hingeline to close it, not much else you can do at this point. Clear tape would work also but then you would still see the gap.

One of the nice things about CA hinges is the small gap they typically produce. Why'd you change them?

Hide Signatures

(in reply to mrsand)
       Post #: 1387

RE: H9-F6F Hellcat 60 ARF - 11/16/2009 3:49 PM   
Wulf



Posts: 320
Score: 100
Joined: 2/3/2003
Last Login: 11/17/2009
From: PENTWATER, MI, USA
Status: online 		CA hinges are OK but keep your eye on them.I`ve had them tear in the past.

_____________________________

Wulfmann

Hide Signatures

(in reply to CRG)
       Post #: 1388

RE: H9-F6F Hellcat 60 ARF - 11/16/2009 4:09 PM   
chuck993


 

Posts: 628
Score: 100
Joined: 1/17/2007
Last Login: 11/17/2009
From: Virginia Beach, VA, USA
Status: offline 		I put a 91FSII four stoke in it and ran the muffler straight down, does anyone know how much clearance this plane has? I'm going slow myself putting it together, but it looks sort of weird with that much muffler sticking out. I fly off of a grass field too.

Hide Signatures

(in reply to Wulf)
       Post #: 1389

RE: H9-F6F Hellcat 60 ARF - 11/16/2009 5:26 PM   
mrsand


 

Posts: 55
Score: 100
Joined: 4/21/2008
Last Login: 11/17/2009
From: sarasota, FL, USA
Status: offline 		CRG

I wasn't paying enough attention to the arf manual...forgot to include the joiner wire first...snafu..I also did not recess the hinge center into the control service..don't want to pull them off again sooo
guess I can place some tape on each side to help tighten the gap.

Hide Signatures

(in reply to chuck993)
       Post #: 1390

RE: H9-F6F Hellcat 60 ARF - 11/16/2009 6:04 PM   
CRG


 

Posts: 182
Score: 100
Joined: 6/1/2005
Last Login: 11/21/2009
From: , CA, USA
Status: offline 		That happens, have done similar things. You should be ok with tape to seal the gap. That'll improve control authority and reduce flutter potential a little.

Hide Signatures

(in reply to mrsand)
       Post #: 1391

Page:   <<   < prev  47 48 49 50 51 52 53 54 55 [56]
All Forums >> RC Airplanes >> RC Warbirds and Warplanes >> RE: H9-F6F Hellcat 60 ARF
Page: <<   < prev  47 48 49 50 51 52 53 54 55 [56]





Jump to:


 
Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

1.125RCU1