Please email Richard your questions by clicking on "Contact US". Please label your email "Richard: Question".

Some questions and answers will be posted in this section.

Page 3: Questions 49-69, click links or browse page.
Q49 Hangar 9 P-61 advice ? Q60 Hangar 9 Hellcat engine choice
Q50 Correct prop for Saito 1.80 ? Q61 Hangar 9 Spitfire engine choice
Q51 Hangar 9 engine mounting ? Q62 Nitroplanes Corsair retract installation
Q52 Hangar 9 P-47 pneumatic retracts ? Q63 Helldiver/SBD ARF availability
Q53 Motor for Spit ? Q64 Corsair cowling paint shceme
Q54 Another Motor for Spit ? Q65 Hangar 9 Corsair CG
Q55 Air retracts for H9 Corsair ? Q66 ARF comparisions
Q56 P-51 choice ? Q67 Hangar 9 P-51 servo selection
Q57 Hangar 9 Corsair retract install ? Q68 Hangar 9 Corsair w/ Saito 90R3 radial
Q58 Top Flite Mustang aileron install Q69 Hanger 9 P-40& Corsair retracts
Q59 CMPro 70" Hellcat    

Question49: "hello, ive read your responses to H9 p51 .60 but i was curious about your overall opinion on this ARF. I am considering the Miss America model and was looking for all kinds of input, hope to hear from you!"

Richard:"Overall, the H9 P-51 .60 is a pretty good ARF with decent craftsmanship. It is very easy to fly and land, just like any other H9 warbirds. I think you will have tons of fun with it"

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Question50: "Hi Richard, I am in a process of putting together Hangar9 P-51 Mustang 1.50. It will be powered by Saito 1.80. What prop would you recommend - I am thinking of using APC 18X6, also do you know anything about the retracts that come with this arf? Do you recommend upgrading them (I fly from grass field)? Thanks, Paul."

Richard: "Paul, prop the engine to run between 8500 - 9000 rpm on the ground. An 18x6 would work, but your Mustang will be slow. I would try a 17x8 or a 16x10 if you are looking for speed. Sorry, I do not know anything about the retracts that come with the H9 Mustang 1.50."

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Question51: "Hi there, Really enjoy the site and the advice. I currently fly a Hangar 9 corsair which I am really pleased with. I am running it with a side mounted supertigre .60 with pitts muffler and swinging a 14/4 APC prop. This prop gives nice pull but not excessive speed which is definitely good for scale like flying and it sounds good as well. The .60 gives plenty of power for this warbird and scale-like cruising requires no more than 1/3 throttle. Love to bring it in for beautiful landings on the mains with the tail settling down as the ground speed decreases. Definitely a fair weather airplane as landings are much more challenging in windy conditions which usually results in bent retract gear unless the landing is near perfect. Trying to flare out on landing too early is definitely a no-no as it'll be more than happy to float back up into the air. I find that one has to keep some power on until just prior to flaring out and the model must be "flown" to touchdown. Takeoffs are much much easier with this corsair than my greatplanes .40 corsair and it flies much more stable as well. A question I'd like to pose to you is this: I just purchased a H9 thunderbolt and am indesicive as to what kind of engine to run on it. I wish to keep everything cowled in. The kit is designed for an inverted 45 degree mounting. Can I draw centering lines on the firewall and try to mount sidemount and use a pitts muffler as I have in my corsair? I do have another .60 supertigre. The "bolt" obviously has the most room at the bottom of the cowling so inverted mounting would be ideal. However, this presents more problems with idling? Would this be solved by an on-board glow system? And what kind of muffler would I use? I have no experience with four-strokes but should I get some by getting a 4 for this bird? Any recommendations u may have are much appreciated! Lloyd "

Richard: "Lloyd, Yes, you can draw centerlines on the firewall and try to mount your 2-stroke sideway and use a Pitts muffler. Mounting your 2-stroke at the factory 45-degree angle would also work and would allow you to use the stock muffler. Mounting your 2-stroke inverted might also work provided that you take the time to carefully tune your low end to prevent flooding. Any .91-1.00 four stroke engine would work just fine, and a four stroke can handle being mounted at 45-degree or inverted better than a 2-stroke."

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Question52: "I have a P47D by hanger 9 I wish to change the retracts to Pneumatics I have striped the plane and are glassing it also adding pannel lines ect. I am trying to deside which retacts would be suitable for the plane, it will have a weight of aproximitly 22 lbs. currently it has mechanical retracts. also i whant to fit a pneumatic tail wheel assembly i am trying to delete the arf look of this plane regards trevor"

Richard: "Trevor, any 85-degree heavy duty retracts from the major retract manufacturers would work. I would go for a set with functional oleo struts or a set that's bored out to accept oleo struts directly. "

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Question53: "first i'm french and my english is not very good!! my question is very simple: i would like to know if you could help me to choise motor for my spitfire (eurolight) why not a 4 stroke but i don't know could you help me? ;) thank you very much for your help! Best regards, Mick.

Richard: "I would use a large, heavy 4-stroke for your Spitfire, such as the OS 120, ASP 120, Saito 125, Saito 150, or RCV 130CD. Your Spitfire will require at least 680 grams of nose weight and will end up around 6.5 kg."

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Question54: "Hi Richard. Got myself the TOPGUN Mk9 spitfire but am confused as to what engine to use. Front cover of manual states 1.20 four stroke and inside tells you 0.91 four stroke. Was thinking of the RCV 91CD to reduce cowling cutting but then look at the OS 120 surpass. Stated weight is 9 – 10 lbs. Which way would you go ?"

Richard: "The OS 120 Surpass has a much taller cylinder head than the RCV 91CD. If the dry weight ends up around 9 - 10 lbs, then the RCV 91CD would be the way to go and would provide sufficient power for the plane. "

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Question55: "Hi Richard, I have the Corsair of Hangar 9 and would want replace the mechanical retracts with retracts to air . It is possible ? which model you suggest to me ? Thanks from Itali. Marco "

Richard: "Hi Marco, Yes, it is possible to replace the stock mechanical retracts with air retracts. You can go with either Century Jet or Sierra Precision rotating retracts."

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Question56: "Richard, I am planning on bying my father one of the two listed P51's below. The only difference i can see is one has longer alerons than the other. But they both fit my price range. Would having longer alerons make it harder to fly cause I would want the easier of the two. Which would you buy, Thank you Mike"

Richard: "Mike, Having longer ailerons doesn't necessarily make a plane harder to fly. Either plane will suit you just fine. I would go for the larger of the two since larger planes tend to fly nicer and won't be affected by the wind as much."

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Question57: "Hangar 9 Corsair: Installing the Centuryjet retracts. It looks as though I have to grind out quite a bit of material including the original mounting blocks to fit the CentrutyJet Retracts in and screw them in place. Is this normal or do I have an older wing. Also, it seems as thought it will greatly weaken the wing. Any tips on reinforcing. Thank you, John"

Richard: "John You only need to widen the original mounting blocks by shaving a little wood off each one. But then you will need to glue in new blocks of wood to mount the retracts, and these new blocks of wood will add strength back in. "

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Question58: "I am building my first warbird and chose the Top Flite P51 Mustang (0.6-1.2 size). The manual calls for a single servo for the ailerons with a bellcrank mechanism in both wings. The bellcranks eliminate the need for servo hatches and maintain a more realistic wing surface but my intuition is to substitute individual servos for better responsiveness and reliability.What do you suggest? Dick"

Richard: "Dick, The bellcrank mechanism can develop play overtime if you are not careful with the installation. I would go with individual aileron servos for better responsiveness. In addition, if one aileron servo fails, then you would still have the other one you can use to land the plane."

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Question59: "Richard, I’m thinking about purchasing the CMPro 70” Hellcat. What do you think of this plane? It seems they are a bit tail heavy so do you think the extra weight of a Saito 150 would help up front or would it be too much power? Also which retracts do you suggest using for this model? Thanks, Aaron"

Richard: "Aaron, The CMPro Hellcat is a fine flyer, but it tends to be floaty on landing. Mine is not tail heavy with an OS 120 four stroke. A Saito 150 would also work. Just make sure you reinforce the rear horizontal stab since it tends to flutter at high speed. As for retracts, go with any high quality rotating pneumatics, such as Sierra."

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Question60: "Hi, I was given a hanger 9 hellcat for christmas 06'. I have been saving up for a motor for this plane and I was thinking about two different types. One the ys110fz due to the smaller size close to a ys .91 and will give me speed which I I was given the option to pick up and RCV 120 for a good price and was wondering because of it's slow RPM range and a 15.75X13 prop minimum would this be enough and not too big for this plane. I know it would fly more scale like which I would like, but the prop size may be to big? Let me know what you think please. Ryland Berg"

Richard: "The RCV 120 will be more than enough for the Hangar 9 Hellcat. In fact, that engine will fly a 14-15 lbs warbird. Since it spins the prop at half the crank speed, one must use a high pitched prop to compensate and gain back the air speed. In fact, a large diameter, multi-bladed prop will be more efficient at lower rpm. The real Hellcat engine spins a 3-blade prop at less than 4000 rpm. With the right prop, the Hangar 9 Hellcat will still be fast when powered by the RCV 120. Richard"

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Question61: "Mr. Richard I have a new H9 spitfire, and i was wanting the think to be as fast as possable, withen reason. i kno the saito 1.00 and 1.25 will work fine with no modifications. But horizon also said the Zenoah 20ei will fit. What are your thoughts on this, and how many changes will I have to make for this engine to fit. Also, do you know of any website where there are pictures i can see this plane with this zenoah 20 installed, i am also concerned about having to cut the cowel to much. Last question, how would the performance be effected to a saito 1.00 or 1.25 by using a Keleo exhaust? Thank you so much for your help."

Richard: "If you want your Spitfire to be as fast as possible, then you don't want it to be powereed by a Zenoah 20ei. In general, small glow engines will put out more power and spin a prop at higher rpm than their gas counterparts. I'm not sure what modifications are needed if you go with the 20ei, but that engine has bigger footprint than the Saito 1.25, so thing will be sticking out of the cowl. Performance will not be affected that much if you use a Keleo exhaust."

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Question62: "Richard, I have a .50 size F4U that I bought from Nitroplanes, and I want to install the mechanical retracts, but I’ve never installed retracts before. Any tips would greatly be appreciated. P.S. The only mechanical retracts that I can find are from AK-MODLES, and their for a .60 size plane. Would they fit, or are there some out there that would fit my model better? Regards, Brian"

Richard: "Hi Brian,If you bought the retract-ready version, then it's straight forward to drop in a set of rotating retracts. You can order the Hobbico's from Tower Hobbies. You will also need to get a low profile high torque retract servo.Richard"

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Question63: "Is there any ARF out there for a Helldiver/SBD Dauntless ?? Been looking to no avail. Gerry Poirier"

Richard: "Sorry Gerry, I have not seen a Helldiver/SBD Dauntless ARF. Hopefully some manufacturer will bring one out in the future."

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Question64: "Richard, Saw a picture of your old h-9 .60 size corsair on warbird obsession, and was wondering how you did the cowling. I'm currently doing one in an old french corsair design that flew during the suez. I need to find the easiest way to get the numbers "416" off. Did you sand the cowl then repaint? If so, do you recall the paint you used? or did you get a replacement cowl from a kit? or just paint it? any help is greatly appreciated. By the way, Love what you guys are doing here."

Richard: "Hi Mike, I used a curved x-acto blade to carefully scrape off the numbers "416" on the cowl. Then I lightly sanded the cowl and repainted it. I brought a piece of covering to my local Home Depot and had them mixed a pint of gloss exterior latex paint. You could also order a replacement cowl for the Top Flite Gold Edition Corsair kit, prime, and paint it."

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Question65: "Finishing up a hangar 9 corsair. It recommends the cg to be 5" from leading edge. I've heard this is tail heavy and should be at 4" aft. Big difference here. Can you shed some light on this? Don't want to fly a porpoise. Going to use a saito 125. Is this OK. If it needs nose weight, could I go to a bigger engine like a saito 150? Thanks in advance"

Richard: "I feel 5" from the leading edge is too far back. I balanced mine at 4.5", and the plane flies great. The plane doesn't need nose weight, so a Saito 125 should be more than enough. Richard"

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Question66: "Hi Richard, Do you know what manufacturer this ARF is from, how easily & well it assembles and it’s flying characteristics? I also wanted to ask you what you think if VQ warbirds: how is the quality of these ARF kits, how well do they assemble, and fly by comparison to the other 40 and 50 sized kits? The VQ kits remind me of the older EZ ARF kits that were offered several years ago, and now have since went out of business I believe. Do you know if VQ is the same product as EZ? Also noticed that VQ offers a different kind of covering on their models, so can this be repaired easily or does a man have to order their replacement parts separately? I also noticed they are now offering KMP kits, any opinions on these larger scale kits in comparison to Hanger 9, Top flight and other model makers? What are the leading ARF kit manufacturers or do you have a complete list? I’ve noticed many different ARF models, seem to bare different company names, but basically look identical and appear to be coming from the same factories in China or their countries of origin (I’ve seen this in particular of models offered by Global, Model tech and Hanger 9. Thank and Congrats on this position! It’s long past overdue that someone offers this sort of service and informational discussion on the internet, especially an R/C dedicated site! Keep up the great work guys! Tracy"

Richard: "Hi Tracy, The 75.5" span F4U Corsair ARF in the picture you sent me is made by China Model Productions, or CMPro for short. It flies great based on owners' testimonials that I've read. VQ warbirds are good quality and fly great compared to other similar sized ARF's. VQ is not the same product as EZ. The covering on VQ warbirds can be repaired, but not as easily as repairing heat shrink film covering. KMP warbirds are top notch, have pretty scale lines, and fly great. If you are looking for a scale warbird ARF, then KMP is the way to go. I would say the leading warbird ARF manufacturers would be Hangar 9, China Model Productions, KMP, and VQ."

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Question67: "Hey richard, Im looking for a new plane, i have my eye set on some P-51s and i think im ready to go to a new plane after my Nexstar. Im trying to figure out which P-51 i would want to buy. Im really looking into the Hangar 9 Miss America P-51 can you suggest some servos that would be sufficient on that plane. And im thinking about the Saito-FA 100 to put. Let me know what you think about those two. thanks, Matt (Franklin Wisconsin)"

Richard: "Hi Matt, The Hangar 9 Miss America P-51 is a great plane to step up to after your Nexstar since it's forgiving and easy to fly and land. The Saito FA100 is a great engine for it. Any high quality standard ball bearing servos would be sufficient."

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Question68: "Hello Richard, I have built a Corsair .60 from Hangar 9 and fit a Saito 90R3 (.90 radial 3 cyl engine.) The aircraft looks great and sounds great but I haven't flown this aircraft since due to winter and snow. I started in the hobby in November/06 and just realize now that the corsair is made to fit a saito 82 to 100 that develops 1.5 & 1.8 hp. The saito 100 also weighs 550grams + 175 grams for the engine mount. The saito 90R3 weighs 850grans with the built-on engine mount but requires an extra battery and the MCD473...All in all the aircraft weighs approximately 1.3 lbs extra weight and just noticed that the 90R3 develops only 0.75hp! (saito just published a pamphlet) It spins a 14 x 6 prop @ 8500RPM. I figured that a .90 is the strenght."

Richard: "Hello Normand, Due to the extra weight of the Saito 90R3, you will need to add lead to the tail of the plane to get it to balance. Also, the plane will feel slightly underpowered because the Saito 90R3 is basically three small 30 four strokes. Extra care must be taken on take off to avoid forcing the plane off the ground too soon. Also, one must be sure to fly the plane on the wing."

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Question69: I just purchased a Hangar 9 P-40 AND Corsair kits. I would like toinstall a good quality retract in to both models. Could you tell me what would work best. servo operated or Pneumatic? And what brand to use? Daryl

Richard: I went with pneumatic rotating retracts in my P-40 and Corsair for durability and reliability. As for the brand, I like Sierra.

Notice: Questions or statements regarding product quality and/or usage are solely the opinion of the writer and not necessarily the opinion or recommendation of or owner/webmaster. By asking a question you are giving or owner/webmaster the right to post your question and name on this page. Not all questions are answered or posted. All questions and answers are copyright


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